The remote Redhat Enterprise Linux 6 / 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2018:3558 advisory.

    The Apache HTTP Server is a powerful, efficient, and extensible web server. The httpd24 packages provide a     recent stable release of version 2.4 of the Apache HTTP Server, along with the mod_auth_kerb module.

    The following packages have been upgraded to a later upstream version: httpd24-httpd (2.4.34),     httpd24-curl (7.61.1). (BZ#1590833, BZ#1648928)

    Security Fix(es):

    * httpd: Improper handling of headers in mod_session can allow a remote user to modify session data for     CGI applications (CVE-2018-1283)

    * httpd: Out of bounds read in mod_cache_socache can allow a remote attacker to cause DoS (CVE-2018-1303)

    * httpd: mod_http2: Too much time allocated to workers, possibly leading to DoS (CVE-2018-1333)

    * httpd: DoS for HTTP/2 connections by continuous SETTINGS frames (CVE-2018-11763)

    * httpd: Out of bounds write in mod_authnz_ldap when using too small Accept-Language values     (CVE-2017-15710)

    * httpd: <FilesMatch> bypass with a trailing newline in the file name (CVE-2017-15715)

    * httpd: Out of bounds access after failure in reading the HTTP request (CVE-2018-1301)

    * httpd: Weak Digest auth nonce generation in mod_auth_digest (CVE-2018-1312)

    * curl: Multiple security issues were fixed in httpd24-curl (CVE-2016-5419, CVE-2016-5420, CVE-2016-5421,     CVE-2016-7141, CVE-2016-7167, CVE-2016-8615, CVE-2016-8616, CVE-2016-8617, CVE-2016-8618, CVE-2016-8619,     CVE-2016-8620, CVE-2016-8621, CVE-2016-8622, CVE-2016-8623, CVE-2016-8624, CVE-2016-8625, CVE-2016-9586,     CVE-2017-1000100, CVE-2017-1000101, CVE-2017-1000254, CVE-2017-1000257, CVE-2017-7407, CVE-2017-8816,     CVE-2017-8817, CVE-2018-1000007, CVE-2018-1000120, CVE-2018-1000121, CVE-2018-1000122, CVE-2018-1000301,     CVE-2018-14618)

    For more details about the security issue(s), including the impact, a CVSS score, and other related     information, refer to the CVE page(s) listed in the References section.

    Red Hat would like to thank the Curl project for reporting CVE-2017-8816, CVE-2017-8817, CVE-2017-1000254,     CVE-2017-1000257, CVE-2018-1000007, CVE-2018-1000120, CVE-2018-1000122, CVE-2018-1000301, CVE-2016-9586,     CVE-2017-1000100, CVE-2017-1000101, CVE-2018-14618, and CVE-2018-1000121. Upstream acknowledges Alex     Nichols as the original reporter of CVE-2017-8816; the OSS-Fuzz project as the original reporter of     CVE-2017-8817 and CVE-2018-1000301; Max Dymond as the original reporter of CVE-2017-1000254 and     CVE-2018-1000122; Brian Carpenter and the OSS-Fuzz project as the original reporters of CVE-2017-1000257;
    Craig de Stigter as the original reporter of CVE-2018-1000007; Duy Phan Thanh as the original reporter of     CVE-2018-1000120; Even Rouault as the original reporter of CVE-2017-1000100; Brian Carpenter as the     original reporter of CVE-2017-1000101; Zhaoyang Wu as the original reporter of CVE-2018-14618; and Dario     Weisser as the original reporter of CVE-2018-1000121.

    Bug Fix(es):

    * Previously, the Apache HTTP Server from the httpd24 Software Collection was unable to handle situations     when static content was repeatedly requested in a browser by refreshing the page. As a consequence, HTTP/2     connections timed out and httpd became unresponsive. This bug has been fixed, and HTTP/2 connections now     work as expected in the described scenario. (BZ#1518737)

    Enhancement(s):

    * This update adds the mod_md module to the httpd24 Software Collection. This module enables managing     domains across virtual hosts and certificate provisioning using the Automatic Certificate Management     Environment (ACME) protocol. The mod_md module is available only for Red Hat Enterprise Linux 7.
    (BZ#1640722)

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Software Collections 3.2 Release     Notes linked from the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote MiracleLinux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2019-3739:01 advisory.

    * httpd: Improper handling of headers in mod_session can allow a remote user to modify session data for     CGI applications (CVE-2018-1283)
    * httpd: Out of bounds read in mod_cache_socache can allow a remote attacker to cause DoS (CVE-2018-1303)
    * httpd: mod_http2: Too much time allocated to workers, possibly leading to DoS (CVE-2018-1333)
    * httpd: DoS for HTTP/2 connections by continuous SETTINGS frames (CVE-2018-11763)
    * httpd: Out of bounds write in mod_authnz_ldap when using too small Accept-Language values     (CVE-2017-15710)
    * httpd:  bypass with a trailing newline in the file name (CVE-2017-15715)
    * httpd: Out of bounds access after failure in reading the HTTP request (CVE-2018-1301)
    * httpd: Weak Digest auth nonce generation in mod_auth_digest (CVE-2018-1312)
    * curl: Multiple security issues were fixed in httpd24-curl (CVE-2016-5419, CVE-2016-5420, CVE-2016-5421,     CVE-2016-7141, CVE-2016-7167, CVE-2016-8615, CVE-2016-8616, CVE-2016-8617, CVE-2016-8618, CVE-2016-8619,     CVE-2016-8620, CVE-2016-8621, CVE-2016-8622, CVE-2016-8623, CVE-2016-8624, CVE-2016-8625, CVE-2016-9586,     CVE-2017-1000100, CVE-2017-1000101, CVE-2017-1000254, CVE-2017-1000257, CVE-2017-7407, CVE-2017-8816,     CVE-2017-8817, CVE-2018-1000007, CVE-2018-1000120, CVE-2018-1000121, CVE-2018-1000122, CVE-2018-1000301,     CVE-2018-14618)

Tenable has extracted the preceding description block directly from the MiracleLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Apache httpd reports :

Out of bound write in mod_authnz_ldap with AuthLDAPCharsetConfig enabled (CVE-2017-15710)

mod_session: CGI-like applications that intend to read from mod_session's 'SessionEnv ON' could be fooled into reading user-supplied data instead. (CVE-2018-1283)

mod_cache_socache: Fix request headers parsing to avoid a possible crash with specially crafted input data. (CVE-2018-1303)

core: Possible crash with excessively long HTTP request headers.
Impractical to exploit with a production build and production LogLevel. (CVE-2018-1301)

core: Configure the regular expression engine to match '$' to the end of the input string only, excluding matching the end of any embedded newline characters. Behavior can be changed with new directive 'RegexDefaultOptions'. (CVE-2017-15715)

mod_auth_digest: Fix generation of nonce values to prevent replay attacks across servers using a common Digest domain. This change may cause problems if used with round robin load balancers.
(CVE-2018-1312)

mod_http2: Potential crash w/ mod_http2. (CVE-2018-1302)

According to the versions of the httpd packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - In Apache httpd 2.0.23 to 2.0.65, 2.2.0 to 2.2.34, and     2.4.0 to 2.4.29, mod_authnz_ldap, if configured with     AuthLDAPCharsetConfig, uses the Accept-Language header     value to lookup the right charset encoding when     verifying the user's credentials. If the header value     is not present in the charset conversion table, a     fallback mechanism is used to truncate it to a two     characters value to allow a quick retry (for example,     'en-US' is truncated to 'en'). A header value of less     than two characters forces an out of bound write of one     NUL byte to a memory location that is not part of the     string. In the worst case, quite unlikely, the process     would crash which could be used as a Denial of Service     attack. In the more likely case, this memory is already     reserved for future use and the issue has no effect at     all.(CVE-2017-15710)

  - In Apache httpd 2.4.0 to 2.4.29, the expression     specified in could match '$' to a newline character in     a malicious filename, rather than matching only the end     of the filename. This could be exploited in     environments where uploads of some files are are     externally blocked, but only by matching the trailing     portion of the filename.(CVE-2017-15715)

  - In Apache httpd 2.2.0 to 2.4.29, when generating an     HTTP Digest authentication challenge, the nonce sent to     prevent reply attacks was not correctly generated using     a pseudo-random seed. In a cluster of servers using a     common Digest authentication configuration, HTTP     requests could be replayed across servers by an     attacker without detection.(CVE-2018-1312)

  - A specially crafted HTTP request header could have     crashed the Apache HTTP Server prior to version 2.4.30     due to an out of bound read while preparing data to be     cached in shared memory. It could be used as a Denial     of Service attack against users of mod_cache_socache.
    The vulnerability is considered as low risk since     mod_cache_socache is not widely used, mod_cache_disk is     not concerned by this vulnerability.(CVE-2018-1303)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The version of AOS installed on the remote host is prior to 5.17.1. It is, therefore, affected by multiple vulnerabilities as referenced in the NXSA-AOS-5.17.1 advisory.

  - When using the Apache JServ Protocol (AJP), care must be taken when trusting incoming connections to     Apache Tomcat. Tomcat treats AJP connections as having higher trust than, for example, a similar HTTP     connection. If such connections are available to an attacker, they can be exploited in ways that may be     surprising. In Apache Tomcat 9.0.0.M1 to 9.0.0.30, 8.5.0 to 8.5.50 and 7.0.0 to 7.0.99, Tomcat shipped     with an AJP Connector enabled by default that listened on all configured IP addresses. It was expected     (and recommended in the security guide) that this Connector would be disabled if not required. This     vulnerability report identified a mechanism that allowed: - returning arbitrary files from anywhere in the     web application - processing any file in the web application as a JSP Further, if the web application     allowed file upload and stored those files within the web application (or the attacker was able to control     the content of the web application by some other means) then this, along with the ability to process a     file as a JSP, made remote code execution possible. It is important to note that mitigation is only     required if an AJP port is accessible to untrusted users. Users wishing to take a defence-in-depth     approach and block the vector that permits returning arbitrary files and execution as JSP may upgrade to     Apache Tomcat 9.0.31, 8.5.51 or 7.0.100 or later. A number of changes were made to the default AJP     Connector configuration in 9.0.31 to harden the default configuration. It is likely that users upgrading     to 9.0.31, 8.5.51 or 7.0.100 or later will need to make small changes to their configurations.
    (CVE-2020-1938)

  - rtl_p2p_noa_ie in drivers/net/wireless/realtek/rtlwifi/ps.c in the Linux kernel through 5.3.6 lacks a     certain upper-bound check, leading to a buffer overflow. (CVE-2019-17666)

  - The Linux kernel before 5.1-rc5 allows page->_refcount reference count overflow, with resultant use-after-     free issues, if about 140 GiB of RAM exists. This is related to fs/fuse/dev.c, fs/pipe.c, fs/splice.c,     include/linux/mm.h, include/linux/pipe_fs_i.h, kernel/trace/trace.c, mm/gup.c, and mm/hugetlb.c. It can     occur with FUSE requests. (CVE-2019-11487)

  - A flaw was found in the fix for CVE-2019-11135, in the Linux upstream kernel versions before 5.5 where,     the way Intel CPUs handle speculative execution of instructions when a TSX Asynchronous Abort (TAA) error     occurs. When a guest is running on a host CPU affected by the TAA flaw (TAA_NO=0), but is not affected by     the MDS issue (MDS_NO=1), the guest was to clear the affected buffers by using a VERW instruction     mechanism. But when the MDS_NO=1 bit was exported to the guests, the guests did not use the VERW mechanism     to clear the affected buffers. This issue affects guests running on Cascade Lake CPUs and requires that     host has 'TSX' enabled. Confidentiality of data is the highest threat associated with this vulnerability.
    (CVE-2019-19338)

  - The xz_decomp function in xzlib.c in libxml2 2.9.1 does not properly detect compression errors, which     allows context-dependent attackers to cause a denial of service (process hang) via crafted XML data.
    (CVE-2015-8035)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

This update for apache2 fixes the following issues :

  - CVE-2018-1283: when mod_session is configured to forward     its session data to CGI applications (SessionEnv on, not     the default), a remote user may influence their content     by using a \'Session\' header leading to unexpected     behavior [bsc#1086814].

  - CVE-2018-1301: due to an out of bound access after a     size limit being reached by reading the HTTP header, a     specially crafted request could lead to remote denial of     service. [bsc#1086817]

  - CVE-2018-1303: a specially crafted HTTP request header     could lead to crash due to an out of bound read while     preparing data to be cached in shared     memory.[bsc#1086813]

  - CVE-2017-15715: a regular expression could match '$' to     a newline character in a malicious filename, rather than     matching only the end of the filename. leading to     corruption of uploaded files.[bsc#1086774]

  - CVE-2018-1312: when generating an HTTP Digest     authentication challenge, the nonce sent to prevent     reply attacks was not correctly generated using a     pseudo-random seed. In a cluster of servers using a     common Digest authentication configuration, HTTP     requests could be replayed across servers by an attacker     without detection. [bsc#1086775]

  - CVE-2017-15710: mod_authnz_ldap, if configured with     AuthLDAPCharsetConfig, uses the Accept-Language header     value to lookup the right charset encoding when     verifying the user's credentials. If the header value is     not present in the charset conversion table, a fallback     mechanism is used to truncate it to a two characters     value to allow a quick retry (for example, 'en-US' is     truncated to 'en'). A header value of less than two     characters forces an out of bound write of one NUL byte     to a memory location that is not part of the string. In     the worst case, quite unlikely, the process would crash     which could be used as a Denial of Service attack. In     the more likely case, this memory is already reserved     for future use and the issue has no effect at all.
    [bsc#1086820]

  - gensslcert: fall back to 'localhost' as hostname     [bsc#1057406]

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Use-after-free on HTTP/2 stream shutdown

When an HTTP/2 stream was destroyed after being handled, the Apache HTTP Server prior to version 2.4.30 could have written a NULL pointer potentially to an already freed memory. The memory pools maintained by the server make this vulnerability hard to trigger in usual configurations, the reporter and the team could not reproduce it outside debug builds, so it is classified as low risk. (CVE-2018-1302)

Bypass with a trailing newline in the file name

In Apache httpd 2.4.0 to 2.4.29, the expression specified in <FilesMatch> could match '$' to a newline character in a malicious filename, rather than matching only the end of the filename. This could be exploited in environments where uploads of some files are are externally blocked, but only by matching the trailing portion of the filename. (CVE-2017-15715)

Out of bounds read in mod_cache_socache can allow a remote attacker to cause a denial of service

A specially crafted HTTP request header could have crashed the Apache HTTP Server prior to version 2.4.30 due to an out of bound read while preparing data to be cached in shared memory. It could be used as a Denial of Service attack against users of mod_cache_socache. The vulnerability is considered as low risk since mod_cache_socache is not widely used, mod_cache_disk is not concerned by this vulnerability.
(CVE-2018-1303)

Improper handling of headers in mod_session can allow a remote user to modify session data for CGI applications

It has been discovered that the mod_session module of Apache HTTP Server (httpd), through version 2.4.29, has an improper input validation flaw in the way it handles HTTP session headers in some configurations. A remote attacker may influence their content by using a 'Session' header. (CVE-2018-1283)

Out of bound write in mod_authnz_ldap when using too small Accept-Language values

In Apache httpd 2.0.23 to 2.0.65, 2.2.0 to 2.2.34, and 2.4.0 to 2.4.29, mod_authnz_ldap, if configured with AuthLDAPCharsetConfig, uses the Accept-Language header value to lookup the right charset encoding when verifying the user's credentials. If the header value is not present in the charset conversion table, a fallback mechanism is used to truncate it to a two characters value to allow a quick retry (for example, 'en-US' is truncated to 'en'). A header value of less than two characters forces an out of bound write of one NUL byte to a memory location that is not part of the string. In the worst case, quite unlikely, the process would crash which could be used as a Denial of Service attack. In the more likely case, this memory is already reserved for future use and the issue has no effect at all.
(CVE-2017-15710)

Out of bound access after failure in reading the HTTP request

A specially crafted request could have crashed the Apache HTTP Server prior to version 2.4.30, due to an out of bound access after a size limit is reached by reading the HTTP header. This vulnerability is considered very hard if not impossible to trigger in non-debug mode (both log and build level), so it is classified as low risk for common server usage. (CVE-2018-1301)

Weak Digest auth nonce generation in mod_auth_digest

In Apache httpd 2.2.0 to 2.4.29, when generating an HTTP Digest authentication challenge, the nonce sent to prevent reply attacks was not correctly generated using a pseudo-random seed. In a cluster of servers using a common Digest authentication configuration, HTTP requests could be replayed across servers by an attacker without detection. (CVE-2018-1312)

The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has httpd packages installed that are affected by multiple vulnerabilities:

  - A specially crafted request could have crashed the Apache HTTP Server prior to version 2.4.30, due to an     out of bound access after a size limit is reached by reading the HTTP header. This vulnerability is     considered very hard if not impossible to trigger in non-debug mode (both log and build level), so it is     classified as low risk for common server usage. (CVE-2018-1301)

  - In Apache httpd 2.0.23 to 2.0.65, 2.2.0 to 2.2.34, and 2.4.0 to 2.4.29, mod_authnz_ldap, if configured     with AuthLDAPCharsetConfig, uses the Accept-Language header value to lookup the right charset encoding     when verifying the user's credentials. If the header value is not present in the charset conversion table,     a fallback mechanism is used to truncate it to a two characters value to allow a quick retry (for example,     'en-US' is truncated to 'en'). A header value of less than two characters forces an out of bound write of     one NUL byte to a memory location that is not part of the string. In the worst case, quite unlikely, the     process would crash which could be used as a Denial of Service attack. In the more likely case, this     memory is already reserved for future use and the issue has no effect at all. (CVE-2017-15710)

  - In Apache HTTP Server 2.4 release 2.4.37 and prior, mod_session checks the session expiry time before     decoding the session. This causes session expiry time to be ignored for mod_session_cookie sessions since     the expiry time is loaded when the session is decoded. (CVE-2018-17199)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote NewStart CGSL host, running version CORE 5.05 / MAIN 5.05, has httpd packages installed that are affected by multiple vulnerabilities:

  - A specially crafted request could have crashed the Apache HTTP Server prior to version 2.4.30, due to an     out of bound access after a size limit is reached by reading the HTTP header. This vulnerability is     considered very hard if not impossible to trigger in non-debug mode (both log and build level), so it is     classified as low risk for common server usage. (CVE-2018-1301)

  - In Apache httpd 2.0.23 to 2.0.65, 2.2.0 to 2.2.34, and 2.4.0 to 2.4.29, mod_authnz_ldap, if configured     with AuthLDAPCharsetConfig, uses the Accept-Language header value to lookup the right charset encoding     when verifying the user's credentials. If the header value is not present in the charset conversion table,     a fallback mechanism is used to truncate it to a two characters value to allow a quick retry (for example,     'en-US' is truncated to 'en'). A header value of less than two characters forces an out of bound write of     one NUL byte to a memory location that is not part of the string. In the worst case, quite unlikely, the     process would crash which could be used as a Denial of Service attack. In the more likely case, this     memory is already reserved for future use and the issue has no effect at all. (CVE-2017-15710)

  - In Apache HTTP Server 2.4 release 2.4.37 and prior, mod_session checks the session expiry time before     decoding the session. This causes session expiry time to be ignored for mod_session_cookie sessions since     the expiry time is loaded when the session is decoded. (CVE-2018-17199)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

This update for apache2 fixes the following issues :

  - CVE-2018-1283: when mod_session is configured to forward     its session data to CGI applications (SessionEnv on, not     the default), a remote user may influence their content     by using a \'Session\' header leading to unexpected     behavior [bsc#1086814].

  - CVE-2018-1301: due to an out of bound access after a     size limit being reached by reading the HTTP header, a     specially crafted request could lead to remote denial of     service. [bsc#1086817]

  - CVE-2018-1303: a specially crafted HTTP request header     could lead to crash due to an out of bound read while     preparing data to be cached in shared     memory.[bsc#1086813]

  - CVE-2017-15715: a regular expression could match '$' to     a newline character in a malicious filename, rather than     matching only the end of the filename. leading to     corruption of uploaded files.[bsc#1086774]

  - CVE-2018-1312: when generating an HTTP Digest     authentication challenge, the nonce sent to prevent     reply attacks was not correctly generated using a     pseudo-random seed. In a cluster of servers using a     common Digest authentication configuration, HTTP     requests could be replayed across servers by an attacker     without detection. [bsc#1086775]

  - CVE-2017-15710: mod_authnz_ldap, if configured with     AuthLDAPCharsetConfig, uses the Accept-Language header     value to lookup the right charset encoding when     verifying the user's credentials. If the header value is     not present in the charset conversion table, a fallback     mechanism is used to truncate it to a two characters     value to allow a quick retry (for example, 'en-US' is     truncated to 'en'). A header value of less than two     characters forces an out of bound write of one NUL byte     to a memory location that is not part of the string. In     the worst case, quite unlikely, the process would crash     which could be used as a Denial of Service attack. In     the more likely case, this memory is already reserved     for future use and the issue has no effect at all.
    [bsc#1086820]

  - CVE-2018-1302: when an HTTP/2 stream was destroyed after     being handled, it could have written a NULL pointer     potentially to an already freed memory. The memory pools     maintained by the server make this vulnerability hard to     trigger in usual configurations, the reporter and the     team could not reproduce it outside debug builds, so it     is classified as low risk. [bsc#1086820]

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The CentOS Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare CENTOS6:CLSA-2026:1778152899 advisory.

  - In Apache httpd 2.0.23 to 2.0.65, 2.2.0 to 2.2.34, and 2.4.0 to 2.4.29, mod_authnz_ldap, if configured     with AuthLDAPCharsetConfig, uses the Accept-Language header value to lookup the right charset encoding     when verifying the user's credentials. If the header value is not present in the charset conversion table,     a fallback mechanism is used to truncate it to a two characters value to allow a quick retry (for example,     'en-US' is truncated to 'en'). A header value of less than two characters forces an out of bound write of     one NUL byte to a memory location that is not part of the string. In the worst case, quite unlikely, the     process would crash which could be used as a Denial of Service attack. In the more likely case, this     memory is already reserved for future use and the issue has no effect at all. (CVE-2017-15710)

  - In Apache httpd 2.4.0 to 2.4.29, the expression specified in <FilesMatch> could match '$' to a newline     character in a malicious filename, rather than matching only the end of the filename. This could be     exploited in environments where uploads of some files are are externally blocked, but only by matching the     trailing portion of the filename. (CVE-2017-15715)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

According to the versions of the httpd packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - The log_cookie function in mod_log_config.c in the     mod_log_config module in the Apache HTTP Server before     2.4.8 allows remote attackers to cause a denial of     service (segmentation fault and daemon crash) via a     crafted cookie that is not properly handled during     truncation.(CVE-2014-0098)

  - A race condition flaw, leading to heap-based buffer     overflows, was found in the mod_status httpd module. A     remote attacker able to access a status page served by     mod_status on a server using a threaded     Multi-Processing Module (MPM) could send a specially     crafted request that would cause the httpd child     process to crash or, possibly, allow the attacker to     execute arbitrary code with the privileges of the     'apache' user.(CVE-2014-0226)

  - It was discovered that the HTTP parser in httpd     incorrectly allowed certain characters not permitted by     the HTTP protocol specification to appear unencoded in     HTTP request headers. If httpd was used in conjunction     with a proxy or backend server that interpreted those     characters differently, a remote attacker could     possibly use this flaw to inject data into HTTP     responses, resulting in proxy cache     poisoning.(CVE-2016-8743)

  - A NULL pointer dereference flaw was found in the way     the mod_cache httpd module handled Content-Type     headers. A malicious HTTP server could cause the httpd     child process to crash when the Apache HTTP server was     configured to proxy to a server with caching     enabled.(CVE-2014-3581)

  - Multiple flaws were found in the way httpd parsed HTTP     requests and responses using chunked transfer encoding.
    A remote attacker could use these flaws to create a     specially crafted request, which httpd would decode     differently from an HTTP proxy software in front of it,     possibly leading to HTTP request smuggling     attacks.(CVE-2015-3183)

  - In Apache httpd 2.0.23 to 2.0.65, 2.2.0 to 2.2.34, and     2.4.0 to 2.4.29, mod_authnz_ldap, if configured with     AuthLDAPCharsetConfig, uses the Accept-Language header     value to lookup the right charset encoding when     verifying the user's credentials. If the header value     is not present in the charset conversion table, a     fallback mechanism is used to truncate it to a two     characters value to allow a quick retry (for example,     'en-US' is truncated to 'en'). A header value of less     than two characters forces an out of bound write of one     NUL byte to a memory location that is not part of the     string. In the worst case, quite unlikely, the process     would crash which could be used as a Denial of Service     attack. In the more likely case, this memory is already     reserved for future use and the issue has no effect at     all.(CVE-2017-15710)

  - A NULL pointer dereference flaw was found in the     httpd's mod_ssl module. A remote attacker could use     this flaw to cause an httpd child process to crash if     another module used by httpd called a certain API     function during the processing of an HTTPS     request.(CVE-2017-3169)

  - It was discovered that httpd used the value of the     Proxy header from HTTP requests to initialize the     HTTP_PROXY environment variable for CGI scripts, which     in turn was incorrectly used by certain HTTP client     implementations to configure the proxy for outgoing     HTTP requests. A remote attacker could possibly use     this flaw to redirect HTTP requests performed by a CGI     script to an attacker-controlled proxy via a malicious     HTTP request.(CVE-2016-5387)

  - A buffer over-read flaw was found in the httpd's     mod_mime module. A user permitted to modify httpd's     MIME configuration could use this flaw to cause httpd     child process to crash.(CVE-2017-7679)

  - A specially crafted HTTP request header could have     crashed the Apache HTTP Server prior to version 2.4.30     due to an out of bound read while preparing data to be     cached in shared memory. It could be used as a Denial     of Service attack against users of mod_cache_socache.
    The vulnerability is considered as low risk since     mod_cache_socache is not widely used, mod_cache_disk is     not concerned by this vulnerability.(CVE-2018-1303)

  - It was discovered that the httpd's mod_auth_digest     module did not properly initialize memory before using     it when processing certain headers related to digest     authentication. A remote attacker could possibly use     this flaw to disclose potentially sensitive information     or cause httpd child process to crash by sending     specially crafted requests to a server.(CVE-2017-9788)

  - A flaw was found in the way httpd handled HTTP Trailer     headers when processing requests using chunked     encoding. A malicious client could use Trailer headers     to set additional HTTP headers after header processing     was performed by other modules. This could, for     example, lead to a bypass of header restrictions     defined with mod_headers.(CVE-2013-5704)

  - A buffer over-read flaw was found in the httpd's     ap_find_token() function. A remote attacker could use     this flaw to cause httpd child process to crash via a     specially crafted HTTP request.(CVE-2017-7668)

  - A race condition was found in mod_auth_digest when the     web server was running in a threaded MPM configuration.
    It could allow a user with valid credentials to     authenticate using another username, bypassing     configured access control restrictions.(CVE-2019-0217)

  - A NULL pointer dereference flaw was found in the     mod_cache httpd module. A malicious HTTP server could     cause the httpd child process to crash when the Apache     HTTP Server was used as a forward proxy with caching.
    (CVE-2013-4352)

  - he dav_xml_get_cdata function in main/util.c in the     mod_dav module in the Apache HTTP Server before 2.4.8     does not properly remove whitespace characters from     CDATA sections, which allows remote attackers to cause     a denial of service (daemon crash) via a crafted DAV     WRITE request. (CVE-2013-6438)

  - A denial of service flaw was found in the mod_proxy     httpd module. A remote attacker could send a specially     crafted request to a server configured as a reverse     proxy using a threaded Multi-Processing Modules (MPM)     that would cause the httpd child process to crash.
    (CVE-2014-0117)

  - A denial of service flaw was found in the way httpd's     mod_deflate module handled request body decompression     (configured via the 'DEFLATE' input filter). A remote     attacker able to send a request whose body would be     decompressed could use this flaw to consume an     excessive amount of system memory and CPU on the target     system.(CVE-2014-0118)

  - A denial of service flaw was found in the way httpd's     mod_cgid module executed CGI scripts that did not read     data from the standard input. A remote attacker could     submit a specially crafted request that would cause the     httpd child process to hang     indefinitely.(CVE-2014-0231)

  - It was discovered that in httpd 2.4, the internal API     function ap_some_auth_required() could incorrectly     indicate that a request was authenticated even when no     authentication was used. An httpd module using this API     function could consequently allow access that should     have been denied. (CVE-2015-3185)

  - It was discovered that the mod_session_crypto module of     httpd did not use any mechanisms to verify integrity of     the encrypted session data stored in the user's     browser. A remote attacker could use this flaw to     decrypt and modify session data using a padding oracle     attack. (CVE-2016-0736)

  - It was discovered that the mod_auth_digest module of     httpd did not properly check for memory allocation     failures. A remote attacker could use this flaw to     cause httpd child processes to repeatedly crash if the     server used HTTP digest authentication.(CVE-2016-2161)

  - It was discovered that the use of httpd's     ap_get_basic_auth_pw() API function outside of the     authentication phase could lead to authentication     bypass. A remote attacker could possibly use this flaw     to bypass required authentication if the API was used     incorrectly by one of the modules used by     httpd.(CVE-2017-3167)

  - A use-after-free flaw was found in the way httpd     handled invalid and previously unregistered HTTP     methods specified in the Limit directive used in an     .htaccess file. A remote attacker could possibly use     this flaw to disclose portions of the server memory, or     cause httpd child process to crash. (CVE-2017-9798)

  - In Apache httpd 2.2.0 to 2.4.29, when generating an     HTTP Digest authentication challenge, the nonce sent to     prevent reply attacks was not correctly generated using     a pseudo-random seed. In a cluster of servers using a     common Digest authentication configuration, HTTP     requests could be replayed across servers by an     attacker without detection. (CVE-2018-1312)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:1121 advisory.

    The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.

    Security Fix(es):

    * httpd: mod_session_cookie does not respect expiry time (CVE-2018-17199)

    * httpd: Out of bounds write in mod_authnz_ldap when using too small Accept-Language values     (CVE-2017-15710)

    * httpd: Out of bounds access after failure in reading the HTTP request (CVE-2018-1301)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.8 Release Notes     linked from the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

* httpd: mod_session_cookie does not respect expiry time * httpd: Out of bounds write in mod_authnz_ldap when using too small Accept-Language values * httpd: Out of bounds access after failure in reading the HTTP request

ID	名稱	產品	系列	已發布	已更新	嚴重性
194113	RHEL 6 / 7 : httpd24 (RHSA-2018:3558)	Nessus	Red Hat Local Security Checks	2024/4/27	2025/3/16	critical
289086	MiracleLinux 7 : httpd24-nghttp2-1.7.1-7.el7, httpd24-curl-7.61.1-1.el7, httpd24-httpd-2.4.34-7.el7 (AXSA:2019-3739:01)	Nessus	Miracle Linux Local Security Checks	2026/1/16	2026/1/16	critical
108626	FreeBSD : apache -- multiple vulnerabilities (f38187e7-2f6e-11e8-8f07-b499baebfeaf)	Nessus	FreeBSD Local Security Checks	2018/3/27	2024/12/6	critical
110877	EulerOS 2.0 SP3 : httpd (EulerOS-SA-2018-1213)	Nessus	Huawei Local Security Checks	2018/7/3	2024/9/6	critical
164612	Nutanix AOS : Multiple Vulnerabilities (NXSA-AOS-5.17.1)	Nessus	Misc.	2022/9/1	2025/9/1	critical
108945	SUSE SLES12 Security Update : apache2 (SUSE-SU-2018:0901-1)	Nessus	SuSE Local Security Checks	2018/4/10	2024/11/12	critical
109555	Amazon Linux AMI : httpd24 (ALAS-2018-1004)	Nessus	Amazon Linux Local Security Checks	2018/5/4	2024/10/14	critical
143931	NewStart CGSL CORE 5.04 / MAIN 5.04 : httpd Multiple Vulnerabilities (NS-SA-2020-0066)	Nessus	NewStart CGSL Local Security Checks	2020/12/9	2020/12/10	high
143994	NewStart CGSL CORE 5.05 / MAIN 5.05 : httpd Multiple Vulnerabilities (NS-SA-2020-0110)	Nessus	NewStart CGSL Local Security Checks	2020/12/9	2020/12/10	high
118251	SUSE SLES12 Security Update : apache2 (SUSE-SU-2018:1161-2)	Nessus	SuSE Local Security Checks	2018/10/22	2022/2/7	critical
360351	CentOS Linux 6 [TuxCare] Security Update: httpd / httpd-devel / httpd-manual / httpd-tools / mod_ssl Multiple Vulnerabilities (CENTOS6:CLSA-2026:1778152899)	Nessus	CentOS Local Security Checks	2026/10/1	2026/10/1	high
124922	EulerOS Virtualization 3.0.1.0 : httpd (EulerOS-SA-2019-1419)	Nessus	Huawei Local Security Checks	2019/5/14	2024/5/23	critical
135072	RHEL 7 : httpd (RHSA-2020:1121)	Nessus	Red Hat Local Security Checks	2020/4/1	2024/11/7	high
135812	Scientific Linux Security Update : httpd on SL7.x x86_64 (20200407)	Nessus	Scientific Linux Local Security Checks	2020/4/21	2020/4/24	high

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