The version of squid installed on the remote host is prior to 4.14-1. It is, therefore, affected by a vulnerability as referenced in the ALAS2SQUID4-2023-005 advisory.

    A flaw was found in squid. Due to improper validation while parsing the request URI, squid is vulnerable     to HTTP request smuggling. This issue could allow a trusted client to perform an HTTP request smuggling     attack and access services otherwise forbidden by squid. The highest threat from this vulnerability is to     data confidentiality. (CVE-2020-25097)

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

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

The remote host is affected by the vulnerability described in GLSA-202105-14 (Squid: Multiple vulnerabilities)

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

    A remote attacker could send a specially crafted request, possibly       resulting in a Denial of Service condition or information leak.
  Workaround :

    There is no known workaround at this time.

The Rocky Linux 8.6 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ ciqsa-2026_0262 advisory.

    This advisory aggregates security fixes for the squid SRPM in CIQ LTS 8.6. It addresses 50 CVEs:
    CVE-2019-12520, CVE-2019-12524, CVE-2013-1839, CVE-2021-28116, CVE-2019-12529, and 45 more.

Tenable has extracted the preceding description block directly from the CIQ 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 CentOS Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2021:1135 advisory.

  - An issue was discovered in Squid through 4.13 and 5.x through 5.0.4. Due to improper input validation, it     allows a trusted client to perform HTTP Request Smuggling and access services otherwise forbidden by the     security controls. This occurs for certain uri_whitespace configuration settings. (CVE-2020-25097)

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

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2021:2025 advisory.

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

    Security Fix(es):

    * squid: improper input validation may allow a trusted client to perform HTTP request smuggling     (CVE-2020-25097)

    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.

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

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

The remote Oracle Linux 8 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2021-1979 advisory.

    squid     [7:4.11-4.2]
    - Resolves: #1944260 - CVE-2020-25097 squid:4/squid: improper input validation       may allow a trusted client to perform HTTP Request Smuggling

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

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

According to the version of the squid package installed, the EulerOS installation on the remote host is affected by the following vulnerability :

  - An issue was discovered in Squid through 4.13 and 5.x     through 5.0.4. Due to improper input validation, it     allows a trusted client to perform HTTP Request     Smuggling and access services otherwise forbidden by     the security controls. This occurs for certain     uri_whitespace configuration settings.(CVE-2020-25097)

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 MiracleLinux 4 host has a package installed that is affected by a vulnerability as referenced in the AXSA:2021-1659:01 advisory.

    * squid: improper input validation may allow a trusted client to perform HTTP     request smuggling (CVE-2020-25097)

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

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

The remote SUSE Linux SLES15 / SLES_SAP15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:1961-1 advisory.

    - update to 4.15:
    - CVE-2021-28652: Broken cache manager URL parsing (bsc#1185918)
    - CVE-2021-28651: Memory leak in RFC 2169 response parsing (bsc#1185921)
    - CVE-2021-28662: Limit HeaderLookupTable_t::lookup() to BadHdr and specific IDs (bsc#1185919)
    - CVE-2021-31806: Handle more Range requests (bsc#1185916)
    - CVE-2020-25097: HTTP Request Smuggling vulnerability (bsc#1183436)
    - Handle more partial responses (bsc#1185923)
    - fix previous change to reinstante permissions macros, because the wrong path has been used     (bsc#1171569).
    - use libexecdir instead of libdir to conform to recent changes in Factory (bsc#1171164).
    - Reinstate permissions macros for pinger binary, because the permissions       package is also responsible for setting up the cap_net_raw capability,       currently a fresh squid install doesn't get a capability bit at all (bsc#1171569).
    - Change pinger and basic_pam_auth helper to use standard permissions. pinger uses cap_net_raw=ep instead     (bsc#1171569)

Tenable has extracted the preceding description block directly from the SUSE 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 SUSE Linux SUSE15 host has a package installed that is affected by multiple vulnerabilities as referenced in the openSUSE-SU-2021:1961-1 advisory.

  - An issue was discovered in Squid through 4.13 and 5.x through 5.0.4. Due to improper input validation, it     allows a trusted client to perform HTTP Request Smuggling and access services otherwise forbidden by the     security controls. This occurs for certain uri_whitespace configuration settings. (CVE-2020-25097)

  - 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 4.x before 4.15 and 5.x before 5.0.6. If a remote server sends a certain     response header over HTTP or HTTPS, there is a denial of service. This header can plausibly occur in     benign network traffic. (CVE-2021-28662)

  - 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)

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

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

  - An issue was discovered in Squid before 4.12 and 5.x     before 5.0.3. Due to use of a potentially dangerous     function, Squid and the default certificate validation     helper are vulnerable to a Denial of Service when     opening a TLS connection to an attacker-controlled     server for HTTPS. This occurs because unrecognized     error values are mapped to NULL, but later code expects     that each error value is mapped to a valid error     string.(CVE-2020-14058)

  - An issue was discovered in Squid through 4.13 and 5.x     through 5.0.4. Due to improper input validation, it     allows a trusted client to perform HTTP Request     Smuggling and access services otherwise forbidden by     the security controls. This occurs for certain     uri_whitespace configuration settings.(CVE-2020-25097)

  - 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)

  - 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 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)

  - 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)

  - 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)

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 Rocky Linux 9.2 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ ciqsa-2026_0495 advisory.

    This advisory aggregates security fixes for the squid SRPM in CIQ LTS 9.2. It addresses 25 CVEs:
    CVE-2024-45802, CVE-2024-23638, CVE-2013-0189, CVE-2013-1839, CVE-2019-12528, and 20 more.

Tenable has extracted the preceding description block directly from the CIQ 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 Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4895-1 advisory.

    Alex Rousskov and Amit Klein discovered that Squid incorrectly handled certain Content-Length headers. A     remote attacker could possibly use this issue to perform an HTTP request smuggling attack, resulting in     cache poisoning. This issue only affected Ubuntu 20.04 LTS. (CVE-2020-15049)

    Jianjun Chen discovered that Squid incorrectly validated certain input. A remote attacker could use this     issue to perform HTTP Request Smuggling and possibly access services forbidden by the security controls.
    (CVE-2020-25097)

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 Rocky Linux 9.6 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ ciqsa-2026_1490 advisory.

    This advisory aggregates security fixes for the squid SRPM in CIQ LTS 9.6. It addresses 30 CVEs:
    CVE-2024-45802, CVE-2024-37894, CVE-2021-46784, CVE-2022-41318, CVE-2023-49286, and 25 more.

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

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

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
181949	Amazon Linux 2 : squid (ALASSQUID4-2023-005)	Nessus	Amazon Linux Local Security Checks	2023/9/27	2024/12/11	high
150021	GLSA-202105-14 : Squid: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	2021/5/27	2024/1/12	high
356925	Rocky Linux 8.6 [CIQ] Security Update: squid / squid-debuginfo / squid-debugsource Multiple Vulnerabilities (ciqsa-2026_0262)	Nessus	Rocky Linux Local Security Checks	2026/10/1	2026/10/11	critical
148885	CentOS 7 : squid (RHSA-2021:1135)	Nessus	CentOS Local Security Checks	2021/4/21	2024/10/9	high
149792	RHEL 8 : squid:4 (RHSA-2021:2025)	Nessus	Red Hat Local Security Checks	2021/5/20	2024/11/7	high
149994	Oracle Linux 8 : squid:4 (ELSA-2021-1979)	Nessus	Oracle Linux Local Security Checks	2021/5/27	2024/10/22	high
151046	EulerOS 2.0 SP8 : squid (EulerOS-SA-2021-1989)	Nessus	Huawei Local Security Checks	2021/6/28	2023/12/12	high
294326	MiracleLinux 4 : squid34-3.4.14-15.0.1.AXS4 (AXSA:2021-1659:01)	Nessus	Miracle Linux Local Security Checks	2026/1/20	2026/1/20	high
150734	SUSE SLES15 Security Update : squid (SUSE-SU-2021:1961-1)	Nessus	SuSE Local Security Checks	2021/6/12	2026/6/25	high
151713	openSUSE 15 Security Update : squid (openSUSE-SU-2021:1961-1)	Nessus	SuSE Local Security Checks	2021/7/16	2024/7/12	high
153296	EulerOS 2.0 SP2 : squid (EulerOS-SA-2021-2433)	Nessus	Huawei Local Security Checks	2021/9/14	2023/11/30	high
355986	Rocky Linux 9.2 [CIQ] Security Update: squid / squid-debuginfo / squid-debugsource Multiple Vulnerabilities (ciqsa-2026_0495)	Nessus	Rocky Linux Local Security Checks	2026/10/1	2026/10/12	critical
148218	Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : Squid vulnerabilities (USN-4895-1)	Nessus	Ubuntu Local Security Checks	2021/3/30	2025/9/3	high
354425	Rocky Linux 9.6 [CIQ] Security Update: squid / squid-debuginfo / squid-debugsource Multiple Vulnerabilities (ciqsa-2026_1490)	Nessus	Rocky Linux Local Security Checks	2026/10/1	2026/10/12	critical

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