The remote Ubuntu 14.04 LTS / 16.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-3557-1 advisory.

    Mathias Fischer discovered that Squid incorrectly handled certain long strings in headers. A malicious     remote server could possibly cause Squid to crash, resulting in a denial of service. This issue was only     addressed in Ubuntu 16.04 LTS. (CVE-2016-2569)

    William Lima discovered that Squid incorrectly handled XML parsing when processing Edge Side Includes     (ESI). A malicious remote server could possibly cause Squid to crash, resulting in a denial of service.
    This issue was only addressed in Ubuntu 16.04 LTS. (CVE-2016-2570)

    Alex Rousskov discovered that Squid incorrectly handled response-parsing failures. A malicious remote     server could possibly cause Squid to crash, resulting in a denial of service. This issue only applied to     Ubuntu 16.04 LTS. (CVE-2016-2571)

    Santiago Ruano Rincn discovered that Squid incorrectly handled certain Vary headers. A remote attacker     could possibly use this issue to cause Squid to crash, resulting in a denial of service. This issue was     only addressed in Ubuntu 16.04 LTS. (CVE-2016-3948)

    Louis Dion-Marcil discovered that Squid incorrectly handled certain Edge Side Includes (ESI) responses. A     malicious remote server could possibly cause Squid to crash, resulting in a denial of service.
    (CVE-2018-1000024)

    Louis Dion-Marcil discovered that Squid incorrectly handled certain Edge Side Includes (ESI) responses. A     malicious remote server could possibly cause Squid to crash, resulting in a denial of service.
    (CVE-2018-1000027)

Tenable has extracted the preceding description block directly from the Ubuntu 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 Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2016:2600 advisory.

    Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data     objects.

    The following packages have been upgraded to a newer upstream version: squid (3.5.20). (BZ#1273942,     BZ#1349775)

    Security Fix(es):

    * Incorrect boundary checks were found in the way squid handled headers in HTTP responses, which could     lead to an assertion failure. A malicious HTTP server could use this flaw to crash squid using a specially     crafted HTTP response. (CVE-2016-2569, CVE-2016-2570)

    * It was found that squid did not properly handle errors when failing to parse an HTTP response, possibly     leading to an assertion failure. A malicious HTTP server could use this flaw to crash squid using a     specially crafted HTTP response. (CVE-2016-2571, CVE-2016-2572)

    * An incorrect boundary check was found in the way squid handled the Vary header in HTTP responses, which     could lead to an assertion failure. A malicious HTTP server could use this flaw to crash squid using a     specially crafted HTTP response. (CVE-2016-3948)

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.3 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 Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2016-2600 advisory.

    - Resolves: #1322770 - CVE-2016-2569 CVE-2016-2570 CVE-2016-2571 CVE-2016-2572       CVE-2016-3948 squid: various flaws
    - Related: #1334509 - CVE-2016-4553 squid: Cache poisoning issue in       HTTP Request handling
    - Related: #1334492 - CVE-2016-4554 CVE-2016-4555 CVE-2016-4556       squid: various flaws
    - Related: #1330577 - CVE-2016-4052 CVE-2016-4053 CVE-2016-4054 squid: multiple       issues in ESI processing
    - Related: #1330577 - CVE-2016-4052 CVE-2016-4053 CVE-2016-4054 squid: multiple       issues in ESI processing

Tenable has extracted the preceding description block directly from the Oracle 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.

An update for squid is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects.

The following packages have been upgraded to a newer upstream version:
squid (3.5.20). (BZ#1273942, BZ#1349775)

Security Fix(es) :

* Incorrect boundary checks were found in the way squid handled headers in HTTP responses, which could lead to an assertion failure. A malicious HTTP server could use this flaw to crash squid using a specially crafted HTTP response. (CVE-2016-2569, CVE-2016-2570)

* It was found that squid did not properly handle errors when failing to parse an HTTP response, possibly leading to an assertion failure. A malicious HTTP server could use this flaw to crash squid using a specially crafted HTTP response. (CVE-2016-2571, CVE-2016-2572)

* An incorrect boundary check was found in the way squid handled the Vary header in HTTP responses, which could lead to an assertion failure. A malicious HTTP server could use this flaw to crash squid using a specially crafted HTTP response. (CVE-2016-3948)

Additional Changes :

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.3 Release Notes linked from the References section.

The Squid HTTP proxy has been updated to version 3.3.14, fixing the following security issues :

  - Fixed multiple Denial of Service issues in HTTP Response     processing. (CVE-2016-2569, CVE-2016-2570,     CVE-2016-2571, CVE-2016-2572, bsc#968392, bsc#968393,     bsc#968394, bsc#968395)

  - CVE-2016-3947: Buffer overrun issue in pinger ICMPv6     processing. (bsc#973782)

  - CVE-2015-5400: Improper protection of alternate path.
    (bsc#938715)

  - CVE-2015-3455: Squid http proxy configured with     client-first SSL bumping did not correctly validate     server certificate. (bsc#929493)

  - CVE-2016-3948: Fixed denial of service in HTTP Response     processing (bsc#973783)

  - CVE-2016-4051: fixes buffer overflow in cachemgr.cgi     (bsc#976553)

  - CVE-2016-4052, CVE-2016-4053, CVE-2016-4054: Fixed     multiple issues in ESI processing (bsc#976556)

  - CVE-2016-4553: Fixed cache poisoning issue in HTTP     Request handling (bsc#979009)

  - CVE-2016-4554: Fixed header smuggling issue in HTTP     Request processing (bsc#979010)

  - Fixed multiple Denial of Service issues in ESI Response     processing. (CVE-2016-4555, CVE-2016-4556, bsc#979011,     bsc#979008)

Additionally, the following non-security issues have been fixed :

  - Fix header size in script unsquid.pl. (bsc#902197)

  - Add external helper ext_session_acl to package.
    (bsc#959290)

  - Update forward_max_tries to permit 25 server paths With     cloud sites becoming more popular more CDN servers are     producing long lists of IPv6 and IPv4 addresses. If     there are not enough paths selected the IPv4 ones may     never be reached.

  - squid.init: wait that squid really dies when we kill it     on upgrade instead of proclaiming its demise prematurely     (bnc#963539)

This update was imported from the SUSE:SLE-12:Update update project.

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

  - Squid 3.x before 3.5.15 and 4.x before 4.0.7 does not     properly append data to String objects, which allows     remote servers to cause a denial of service (assertion     failure and daemon exit) via a long string, as     demonstrated by a crafted HTTP Vary     header.(CVE-2016-2569)

  - The Edge Side Includes (ESI) parser in Squid 3.x before     3.5.15 and 4.x before 4.0.7 does not check buffer     limits during XML parsing, which allows remote HTTP     servers to cause a denial of service (assertion failure     and daemon exit) via a crafted XML document, related to     esi/CustomParser.cc and     esi/CustomParser.h.(CVE-2016-2570)

  - http.cc in Squid 3.x before 3.5.15 and 4.x before 4.0.7     proceeds with the storage of certain data after a     response-parsing failure, which allows remote HTTP     servers to cause a denial of service (assertion failure     and daemon exit) via a malformed     response.(CVE-2016-2571)

  - http.cc in Squid 4.x before 4.0.7 relies on the HTTP     status code after a response-parsing failure, which     allows remote HTTP servers to cause a denial of service     (assertion failure and daemon exit) via a malformed     response.(CVE-2016-2572)

  - Squid 3.x before 3.5.16 and 4.x before 4.0.8 improperly     perform bounds checking, which allows remote attackers     to cause a denial of service via a crafted HTTP     response, related to Vary headers.(CVE-2016-3948)

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.

Squid security advisory 2016:2 reports :

Due to incorrect bounds checking Squid is vulnerable to a denial of service attack when processing HTTP responses.

These problems allow remote servers delivering certain unusual HTTP response syntax to trigger a denial of service for all clients accessing the Squid service.

HTTP responses containing malformed headers that trigger this issue are becoming common. We are not certain at this time if that is a sign of malware or just broken server scripting.

The remote host is affected by the vulnerability described in GLSA-201607-01 (Squid: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Squid. Please review       the CVE identifiers referenced below for details.
  Impact :

    An attacker can possibly execute arbitrary code or create a Denial of       Service condition.
  Workaround :

    There is no known workaround at this time.

ID	名稱	產品	系列	已發布	已更新	嚴重性
106619	Ubuntu 14.04 LTS / 16.04 LTS : Squid vulnerabilities (USN-3557-1)	Nessus	Ubuntu Local Security Checks	2018/2/6	2024/8/27	high
94563	RHEL 7 : squid (RHSA-2016:2600)	Nessus	Red Hat Local Security Checks	2016/11/4	2025/3/20	high
94719	Oracle Linux 7 : squid (ELSA-2016-2600)	Nessus	Oracle Linux Local Security Checks	2016/11/11	2024/10/22	high
95346	CentOS 7 : squid (CESA-2016:2600)	Nessus	CentOS Local Security Checks	2016/11/28	2026/1/16	high
92994	openSUSE Security Update : squid (openSUSE-2016-988)	Nessus	SuSE Local Security Checks	2016/8/17	2026/1/28	high
99818	EulerOS 2.0 SP1 : squid (EulerOS-SA-2016-1056)	Nessus	Huawei Local Security Checks	2017/5/1	2025/12/22	high
88944	FreeBSD : squid -- remote DoS in HTTP response processing (660ebbf5-daeb-11e5-b2bd-002590263bf5)	Nessus	FreeBSD Local Security Checks	2016/2/25	2021/1/4	high
91982	GLSA-201607-01 : Squid: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	2016/7/11	2021/1/11	high

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