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)

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.

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_rewrite configurations vulnerable to open     redirect (CVE-2020-1927)

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

  - httpd: mod_rewrite potential open redirect     (CVE-2019-10098)

  - httpd: mod_proxy_ftp use of uninitialized value     (CVE-2020-1934)

ID	名稱	產品	系列	已發布	已更新	嚴重性
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
110877	EulerOS 2.0 SP3 : httpd (EulerOS-SA-2018-1213)	Nessus	Huawei Local Security Checks	2018/7/3	2024/9/6	critical
141711	Scientific Linux Security Update : httpd on SL7.x x86_64 (20201001)	Nessus	Scientific Linux Local Security Checks	2020/10/21	2025/2/20	high

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