This update for squid3 fixes the following issues :

  - CVE-2018-1172: Fixed a DoS caused by incorrect handling     of ESI responses. (bsc#1090089, SQUID-2018:3)

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 remote Redhat Enterprise Linux 7 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - squid: Information disclosure in Collapsed forwarding (CVE-2016-10003)

  - This vulnerability allows remote attackers to deny service on vulnerable installations of The Squid     Software Foundation Squid 3.5.27-20180318. Authentication is not required to exploit this vulnerability.
    The specific flaw exists within ClientRequestContext::sslBumpAccessCheck(). A crafted request can trigger     the dereference of a null pointer. An attacker can leverage this vulnerability to create a denial-of-     service condition to users of the system. Was ZDI-CAN-6088. (CVE-2018-1172)

  - Squid before 4.4 has XSS via a crafted X.509 certificate during HTTP(S) error page generation for     certificate errors. (CVE-2018-19131)

  - Squid before 4.4, when SNMP is enabled, allows a denial of service (Memory Leak) via an SNMP packet.
    (CVE-2018-19132)

  - Squid through 4.14 and 5.x through 5.0.5, in some configurations, allows information disclosure because of     an out-of-bounds read in WCCP protocol data. This can be leveraged as part of a chain for remote code     execution as nobody. (CVE-2021-28116)

  - An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to a buffer-management bug, it     allows a denial of service. When resolving a request with the urn: scheme, the parser leaks a small amount     of memory. However, there is an unspecified attack methodology that can easily trigger a large amount of     memory consumption. (CVE-2021-28651)

  - An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to incorrect parser validation, it     allows a Denial of Service attack against the Cache Manager API. This allows a trusted client to trigger     memory leaks that. over time, lead to a Denial of Service via an unspecified short query string. This     attack is limited to clients with Cache Manager API access privilege. (CVE-2021-28652)

  - An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to a memory-management bug, it is     vulnerable to a Denial of Service attack (against all clients using the proxy) via HTTP Range request     processing. (CVE-2021-31806)

  - An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. An integer overflow problem allows a     remote server to achieve Denial of Service when delivering responses to HTTP Range requests. The issue     trigger is a header that can be expected to exist in HTTP traffic without any malicious intent.
    (CVE-2021-31807)

  - An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to an input-validation bug, it is     vulnerable to a Denial of Service attack (against all clients using the proxy). A client sends an HTTP     Range request to trigger this. (CVE-2021-31808)

  - Squid before 4.15 and 5.x before 5.0.6 allows remote servers to cause a denial of service (affecting     availability to all clients) via an HTTP response. The issue trigger is a header that can be expected to     exist in HTTP traffic without any malicious intent by the server. (CVE-2021-33620)

  - Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Affected versions of squid are     subject to a a Use-After-Free bug which can lead to a Denial of Service attack via collapsed forwarding.
    All versions of Squid from 3.5 up to and including 5.9 configured with collapsed_forwarding on are     vulnerable. Configurations with collapsed_forwarding off or without a collapsed_forwarding directive     are not vulnerable. This bug is fixed by Squid version 6.0.1. Users are advised to upgrade. Users unable     to upgrade should remove all collapsed_forwarding lines from their squid.conf. (CVE-2023-49288)

  - Squid is a caching proxy for the Web. Due to an expired pointer reference bug, Squid prior to version 6.6     is vulnerable to a Denial of Service attack against Cache Manager error responses. This problem allows a     trusted client to perform Denial of Service when generating error pages for Client Manager reports. Squid     older than 5.0.5 have not been tested and should be assumed to be vulnerable. All Squid-5.x up to and     including 5.9 are vulnerable. All Squid-6.x up to and including 6.5 are vulnerable. This bug is fixed by     Squid version 6.6. In addition, patches addressing this problem for the stable releases can be found in     Squid's patch archives. As a workaround, prevent access to Cache Manager using Squid's main access     control: `http_access deny manager`. (CVE-2024-23638)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

The version of tested product installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2020-1486 advisory.

  - This vulnerability allows remote attackers to deny service on vulnerable installations of The Squid     Software Foundation Squid 3.5.27-20180318. Authentication is not required to exploit this vulnerability.
    The specific flaw exists within ClientRequestContext::sslBumpAccessCheck(). A crafted request can trigger     the dereference of a null pointer. An attacker can leverage this vulnerability to create a denial-of-     service condition to users of the system. Was ZDI-CAN-6088. (CVE-2018-1172)

  - An issue was discovered in Squid before 4.10. It allows a crafted FTP server to trigger disclosure of     sensitive information from heap memory, such as information associated with other users' sessions or non-     Squid processes. (CVE-2019-12528)

  - An issue was discovered in Squid 2.x, 3.x, and 4.x through 4.8. Due to incorrect data management, it is     vulnerable to information disclosure when processing HTTP Digest Authentication. Nonce tokens contain the     raw byte value of a pointer that sits within heap memory allocation. This information reduces ASLR     protections and may aid attackers isolating memory areas to target for remote code execution attacks.
    (CVE-2019-18679)

  - An issue was discovered in Squid before 4.10. Due to incorrect buffer management, a remote client can     cause a buffer overflow in a Squid instance acting as a reverse proxy. (CVE-2020-8450)

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

According to its banner, the version of Squid running on the remote host is 3.1.x after or equal to 3.1.12.2 and prior or equal to 3.1.23, 3.2.x after or equal to 3.2.0.8 and prior or equal to 3.2.0.8, 3.3.x, 3.4.x, 3.5.x prior or equal to 3.5.27, or 4.x prior to 4.0.13. It is, therefore, affected by a denial of service (DoS) vulnerability in the ESI response processing component due to incorrect pointer handling. A remote attacker controlled server can exploit this issue, via a crafted ESI response, to cause a denial of service for all clients accessing the Squid service.

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

This update fixes the following issues :

  - CVE-2018-1172: Squid Proxy Cache Denial of Service     vulnerability (bsc#1090089). This update was imported     from the SUSE:SLE-12-SP2:Update update project.

This update fixes the following issues :

  - CVE-2018-1172: Squid Proxy Cache Denial of Service     vulnerability (bsc#1090089).

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.

ID	Name	Product	Family	Published	Updated	Severity
110032	SUSE SLES11 Security Update : squid3 (SUSE-SU-2018:1365-1)	Nessus	SuSE Local Security Checks	5/23/2018	1/19/2021	medium
195586	RHEL 7 : squid (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	5/11/2024	5/11/2024	high
140199	Amazon Linux 2 : squid (ALAS-2020-1486)	Nessus	Amazon Linux Local Security Checks	9/2/2020	5/12/2022	high
119725	Squid 3.1.12.2 <= 3.1.x <= 3.1.23 / 3.2.0.8 <= 3.2.x <= 3.2.14 / 3.3.x / 3.4.x / 3.5.x <= 3.5.27 / 4.x < 4.0.13 Denial of Service Vulnerability (SQUID-2018:3)	Nessus	Firewalls	12/17/2018	10/31/2019	medium
109537	openSUSE Security Update : squid (openSUSE-2018-412)	Nessus	SuSE Local Security Checks	5/3/2018	1/19/2021	medium
109547	SUSE SLES12 Security Update : squid (SUSE-SU-2018:1122-1)	Nessus	SuSE Local Security Checks	5/3/2018	9/10/2019	medium
195583	RHEL 6 : squid (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	5/11/2024	5/11/2024	critical

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