The remote Oracle Linux 8 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2022-5526 advisory.

    squid     [7:4.15-3.1]
    - Resolves: #2100782 - CVE-2021-46784 squid:4/squid: DoS when processing gopher       server responses

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.

The remote CentOS Linux 8 host has packages installed that are affected by a vulnerability as referenced in the CESA-2022:5526 advisory.

  - squid: DoS when processing gopher server responses (CVE-2021-46784)

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

The remote AlmaLinux 8 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2022:5526 advisory.

    * squid: DoS when processing gopher server responses (CVE-2021-46784)

Tenable has extracted the preceding description block directly from the AlmaLinux 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 7 host has a package installed that is affected by a vulnerability as referenced in the ELSA-2023-16656 advisory.

    - Resolves: #2100782 - CVE-2021-46784 squid:4/squid: DoS when processing gopher       server responses
    - Resolves: #1941506 - CVE-2021-28116 squid:4/squid: out-of-bounds read in WCCP       protocol data may lead to information disclosure
    - Resolves: #1944261 - 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.

The version of squid installed on the remote host is prior to 4.15-1. It is, therefore, affected by a vulnerability as referenced in the ALAS2SQUID4-2023-003 advisory.

    In Squid 3.x through 3.5.28, 4.x through 4.17, and 5.x before 5.6, due to improper buffer management, a     Denial of Service can occur when processing long Gopher server responses. (CVE-2021-46784)

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.

An update of the squid package has been released.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - In Squid 3.x through 3.5.28, 4.x through 4.17, and 5.x before 5.6, due to improper buffer management, a     Denial of Service can occur when processing long Gopher server responses. (CVE-2021-46784)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote MiracleLinux 7 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2022-3510:01 advisory.

    * squid: DoS when processing gopher server responses (CVE-2021-46784)

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 Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2022:5530 advisory.

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

    Security Fix(es):

    * squid: DoS when processing gopher server responses (CVE-2021-46784)

    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 SUSE Linux SLES12 / SLES_SAP12 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:2367-1 advisory.

  - 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)

  - In Squid 3.x through 3.5.28, 4.x through 4.17, and 5.x before 5.6, due to improper buffer management, a     Denial of Service can occur when processing long Gopher server responses. (CVE-2021-46784)

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-2022:5542 advisory.

  - In Squid 3.x through 3.5.28, 4.x through 4.17, and 5.x before 5.6, due to improper buffer management, a     Denial of Service can occur when processing long Gopher server responses. (CVE-2021-46784)

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

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALINUX3-SA-2022:0132 advisory.

    Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

    CVE-2021-28116:
    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-2021-28651:
    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-2021-28652:
    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-2021-28662:
    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-2021-31806:
    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-2021-31807:
    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-2021-31808:
    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-2021-33620:
    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-2021-46784:
    In Squid 3.x through 3.5.28, 4.x through 4.17, and 5.x before 5.6, due to improper buffer management, a     Denial of Service can occur when processing long Gopher server responses.

Tenable has extracted the preceding description block directly from the Alibaba Cloud 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 Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-5491-1 advisory.

    Joshua Rogers discovered that Squid incorrectly handled the Gopher protocol. A remote attacker could     possibly use this issue to cause Squid to crash, resulting in a denial of service.

Tenable has extracted the preceding description block directly from the Ubuntu 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 Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2022:5528 advisory.

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

    Security Fix(es):

    * squid: DoS when processing gopher server responses (CVE-2021-46784)

    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.

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

  - In Squid 3.x through 3.5.28, 4.x through 4.17, and 5.x before 5.6, due to improper buffer management, a     Denial of Service can occur when processing long Gopher server responses. (CVE-2021-46784)

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 squid installed on the remote host is prior to 3.5.20-17. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2023-1907 advisory.

    In Squid 3.x through 3.5.28, 4.x through 4.17, and 5.x before 5.6, due to improper buffer management, a     Denial of Service can occur when processing long Gopher server responses. (CVE-2021-46784)

    A flaw was found in Squid. An incorrect integer overflow protection in the Squid SSPI and SMB     authentication helpers is vulnerable to a buffer overflow attack, resulting in information disclosure or a     denial of service. (CVE-2022-41318)

Tenable has extracted the preceding description block directly from the tested product 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 Rocky Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2022:5526 advisory.

  - In Squid 3.x through 3.5.28, 4.x through 4.17, and 5.x before 5.6, due to improper buffer management, a     Denial of Service can occur when processing long Gopher server responses. (CVE-2021-46784)

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

The remote MiracleLinux 9 host has a package installed that is affected by a vulnerability as referenced in the AXSA:2022-4015:03 advisory.

    * squid: DoS when processing gopher server responses (CVE-2021-46784)

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.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
162968	Oracle Linux 8 : squid:4 (ELSA-2022-5526)	Nessus	Oracle Linux Local Security Checks	2022/7/8	2024/10/22	medium
162990	CentOS 8 : squid:4 (CESA-2022:5526)	Nessus	CentOS Local Security Checks	2022/7/11	2023/2/8	medium
163345	AlmaLinux 8 : squid:4 (5526) (ALSA-2022:5526)	Nessus	Alma Linux Local Security Checks	2022/7/21	2025/1/13	medium
170177	Oracle Linux 7 : squid (ELSA-2023-16656)	Nessus	Oracle Linux Local Security Checks	2023/1/19	2024/11/2	medium
181978	Amazon Linux 2 : squid (ALASSQUID4-2023-003)	Nessus	Amazon Linux Local Security Checks	2023/9/27	2024/12/11	medium
203966	Photon OS 3.0: Squid PHSA-2022-3.0-0433	Nessus	PhotonOS Local Security Checks	2024/7/24	2024/7/24	medium
251603	Linux Distros Unpatched Vulnerability : CVE-2021-46784	Nessus	Misc.	2025/8/18	2025/8/18	medium
294127	MiracleLinux 7 : squid-3.5.20-17.el7.7 (AXSA:2022-3510:01)	Nessus	Miracle Linux Local Security Checks	2026/1/20	2026/1/20	medium
162828	RHEL 8 : squid:4 (RHSA-2022:5530)	Nessus	Red Hat Local Security Checks	2022/7/7	2024/11/7	medium
163065	SUSE SLES12 Security Update : squid (SUSE-SU-2022:2367-1)	Nessus	SuSE Local Security Checks	2022/7/13	2023/7/13	medium
163740	CentOS 7 : squid (RHSA-2022:5542)	Nessus	CentOS Local Security Checks	2022/8/2	2024/10/9	medium
236478	Alibaba Cloud Linux 3 : 0132: squid:4 (ALINUX3-SA-2022:0132)	Nessus	Alibaba Cloud Linux Local Security Checks	2025/5/14	2025/5/14	medium
162485	Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS : Squid vulnerability (USN-5491-1)	Nessus	Ubuntu Local Security Checks	2022/6/22	2024/8/27	medium
162829	RHEL 8 : squid:4 (RHSA-2022:5528)	Nessus	Red Hat Local Security Checks	2022/7/8	2024/11/7	medium
166626	EulerOS 2.0 SP3 : squid (EulerOS-SA-2022-2636)	Nessus	Huawei Local Security Checks	2022/10/27	2022/11/28	medium
170450	Amazon Linux 2 : squid (ALAS-2023-1907)	Nessus	Amazon Linux Local Security Checks	2023/1/24	2024/12/11	high
184599	Rocky Linux 8 : squid:4 (RLSA-2022:5526)	Nessus	Rocky Linux Local Security Checks	2023/11/6	2023/11/6	medium
292829	MiracleLinux 9 : squid-5.2-1.el9.1 (AXSA:2022-4015:03)	Nessus	Miracle Linux Local Security Checks	2026/1/20	2026/1/20	medium

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