远程 Oracle Linux 9 主机上安装的程序包受到 ELSA-2024-0071 公告中提及的多个漏洞的影响。

  - Squid 是 Web 的缓存代理。由于对指定索引缺陷的验证不正确，使用“--with-openssl”编译的 Squid 版本 3.3.0.1 到 5.9 和 6.0 至 6.4 很容易受到针对 SSL 证书验证的拒绝服务攻击的影响。此问题允许远程服务器通过使用服务器证书链中特制的 SSL 证书启动 TLS 握手来针对 Squid 代理执行拒绝服务。此攻击仅限于 HTTPS 和 SSL-Bump。该错误在 Squid 版本 6.4 中已修复。还可以在 Squid 的补丁档案中找到解决稳定版本中此问题的补丁。使用 Squid 预打包版本的用户应向软件包供应商咨询有关更新软件包的可用性信息。(CVE-2023-46724)

  - Squid 是适用于 Web 的缓存代理，支持 HTTP、HTTPS、FTP 等。由于缓冲区溢出错误，Squid 容易受到针对 Squid HTTP 消息处理的拒绝服务攻击。该错误已在 Squid 版本 6.5 中修复。建议所有用户都进行升级。目前尚无针对此漏洞的解决方案。
    (CVE-2023-49285)

  - Squid 是适用于 Web 的缓存代理，支持 HTTP、HTTPS、FTP 等。由于空指针取消引用错误，Squid 的 Gopher 网关容易遭受拒绝服务攻击。在 6.0.1 版本之前的 Squid 中，gopher 协议始终可用并在 Squid 中启用。触发此错误的响应可以从任何 gopher 服务器接收，即使是那些没有恶意的服务器。已在 Squid 版本 6.0.1 中移除 Gopher 支持。建议所有用户都进行升级。无法升级的用户应拒绝所有 gopher URL 请求。(CVE-2023-46728)

  - Squid 是适用于 Web 的缓存代理，支持 HTTP、HTTPS、FTP 等。由于函数返回值检查不正确错误，Squid 容易受到针对其 Helper 进程管理的拒绝服务攻击。该错误已在 Squid 版本 6.5 中修复。建议所有用户都进行升级。目前尚无针对此漏洞的变通方案。(CVE-2023-49286)

请注意，Nessus 尚未测试这些问题，而是只依据应用程序自我报告的版本号进行判断。

远程 Redhat Enterprise Linux 8 主机上安装的程序包受到 RHSA-2024:0773 公告中提及的多个漏洞的影响。

    Squid 是针对 Web 客户端的高性能代理缓存服务器，支持 FTP 和 HTTP 数据对象。

    安全修复：

    * squid：HTTP 和 HTTPS 的 DoS(CVE-2023-5824)

    * squid：SSL 证书验证中的拒绝服务漏洞 (CVE-2023-46724)

    * squid：gopher 协议代码中的空指针取消引用漏洞 (CVE-2023-46728)

    * squid：HTTP 消息处理功能中的缓冲区读取越界漏洞 (CVE-2023-49285)

    * squid：Helper 进程管理中的函数返回值检查错误漏洞 (CVE-2023-49286)

    * squid：HTTP 请求解析中的拒绝服务漏洞 (CVE-2023-50269)

    错误修复：

    * 当存在父对等机时，squid 在断言中崩溃 (RHEL-18254)

    有关上述安全问题的更多详细信息，包括其影响、CVSS 得分、致谢，以及其他相关信息，请参阅列于“参考”部分的 CVE 页面。

Tenable 已直接从 Red Hat Enterprise Linux 安全公告中提取上述描述块。

请注意，Nessus 尚未测试这些问题，而是只依据应用程序自我报告的版本号进行判断。

远程 Redhat Enterprise Linux 7 主机上安装的多个程序包受到 RHSA-2024:1787 公告中提及的多个漏洞影响。

  - squid：SSL 证书验证中的拒绝服务漏洞 (CVE-2023-46724)

  - squid：gopher 协议代码中的空指针取消引用漏洞 (CVE-2023-46728)

  - squid：HTTP 消息处理功能中的缓冲区读取越界漏洞 (CVE-2023-49285)

  - squid：Helper 进程管理中的函数返回值检查错误漏洞 (CVE-2023-49286)

  - squid：HTTP 请求解析中的拒绝服务漏洞 (CVE-2023-50269)

  - squid：HTTP 标头解析中的拒绝服务漏洞 (CVE-2024-25617)

请注意，Nessus 尚未测试这些问题，而是只依据应用程序自我报告的版本号进行判断。

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALINUX3-SA-2024:0020 advisory.

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

    CVE-2023-46724:
    Squid is a caching proxy for the Web. Due to an Improper Validation of Specified Index bug, Squid versions     3.3.0.1 through 5.9 and 6.0 prior to 6.4 compiled using `--with-openssl` are vulnerable to a Denial of     Service attack against SSL Certificate validation. This problem allows a remote server to perform Denial     of Service against Squid Proxy by initiating a TLS Handshake with a specially crafted SSL Certificate in a     server certificate chain. This attack is limited to HTTPS and SSL-Bump. This bug is fixed in Squid version     6.4. In addition, patches addressing this problem for the stable releases can be found in Squid's patch     archives. Those who you use a prepackaged version of Squid should refer to the package vendor for     availability information on updated packages.

    CVE-2023-46728:
    Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a NULL pointer     dereference bug Squid is vulnerable to a Denial of Service attack against Squid's Gopher gateway. The     gopher protocol is always available and enabled in Squid prior to Squid 6.0.1. Responses triggering this     bug are possible to be received from any gopher server, even those without malicious intent. Gopher     support has been removed in Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade     should reject all gopher URL requests.

    CVE-2023-49285:
    Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a Buffer Overread bug     Squid is vulnerable to a Denial of Service attack against Squid HTTP Message processing. This bug is fixed     by Squid version 6.5. Users are advised to upgrade. There are no known workarounds for this vulnerability.

    CVE-2023-49286:
    Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to an Incorrect Check of     Function Return Value bug Squid is vulnerable to a Denial of Service attack against its Helper process     management. This bug is fixed by Squid version 6.5. Users are advised to upgrade. There are no known     workarounds for this vulnerability.

    CVE-2023-5824:
    Squid is vulnerable to Denial of Service attack against HTTP and HTTPS clients due to an Improper Handling     of Structural Elements bug.

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 Fedora 39 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-ab77331a34 advisory.

    - New version 6.6
    - Important security fixes
    - Removed gopher support

Tenable has extracted the preceding description block directly from the Fedora 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 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2024:0071 advisory.

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

    Security Fix(es):

    * squid: Denial of Service in SSL Certificate validation (CVE-2023-46724)

    * squid: NULL pointer dereference in the gopher protocol code (CVE-2023-46728)

    * squid: Buffer over-read in the HTTP Message processing feature (CVE-2023-49285)

    * squid: Incorrect Check of Function Return Value In Helper Process management (CVE-2023-49286)

    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 these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2024-0071 advisory.

    - squid: Denial of Service in SSL Certificate validation (CVE-2023-46724)
    - squid: NULL pointer dereference in the gopher protocol code (CVE-2023-46728)
    - squid: Buffer over-read in the HTTP Message processing feature (CVE-2023-49285)

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.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:0773 advisory.

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

    Security Fix(es):

    * squid: DoS against HTTP and HTTPS (CVE-2023-5824)

    * squid: Denial of Service in SSL Certificate validation (CVE-2023-46724)

    * squid: NULL pointer dereference in the gopher protocol code (CVE-2023-46728)

    * squid: Buffer over-read in the HTTP Message processing feature (CVE-2023-49285)

    * squid: Incorrect Check of Function Return Value In Helper Process management (CVE-2023-49286)

    * squid: denial of service in HTTP request parsing (CVE-2023-50269)

    Bug Fix(es):

    * squid crashes in assertion when a parent peer exists (RHEL-18254)

    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 these issues but has instead relied only on the application's self-reported version number.

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

  - Squid is a caching proxy for the Web. Due to an Improper Validation of Specified Index bug, Squid versions     3.3.0.1 through 5.9 and 6.0 prior to 6.4 compiled using `--with-openssl` are vulnerable to a Denial of     Service attack against SSL Certificate validation. This problem allows a remote server to perform Denial     of Service against Squid Proxy by initiating a TLS Handshake with a specially crafted SSL Certificate in a     server certificate chain. This attack is limited to HTTPS and SSL-Bump. This bug is fixed in Squid version     6.4. In addition, patches addressing this problem for the stable releases can be found in Squid's patch     archives. Those who you use a prepackaged version of Squid should refer to the package vendor for     availability information on updated packages. (CVE-2023-46724)

  - Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a NULL pointer     dereference bug Squid is vulnerable to a Denial of Service attack against Squid's Gopher gateway. The     gopher protocol is always available and enabled in Squid prior to Squid 6.0.1. Responses triggering this     bug are possible to be received from any gopher server, even those without malicious intent. Gopher     support has been removed in Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade     should reject all gopher URL requests. (CVE-2023-46728)

  - Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a Buffer Overread bug     Squid is vulnerable to a Denial of Service attack against Squid HTTP Message processing. This bug is fixed     by Squid version 6.5. Users are advised to upgrade. There are no known workarounds for this vulnerability.
    (CVE-2023-49285)

  - Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to an Incorrect Check of     Function Return Value bug Squid is vulnerable to a Denial of Service attack against its Helper process     management. This bug is fixed by Squid version 6.5. Users are advised to upgrade. There are no known     workarounds for this vulnerability. (CVE-2023-49286)

  - Squid is a caching proxy for the Web. Due to an Uncontrolled Recursion bug in versions 2.6 through     2.7.STABLE9, versions 3.1 through 5.9, and versions 6.0.1 through 6.5, Squid may be vulnerable to a Denial     of Service attack against HTTP Request parsing. This problem allows a remote client to perform Denial of     Service attack by sending a large X-Forwarded-For header when the follow_x_forwarded_for feature is     configured. 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. (CVE-2023-50269)

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 Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:1787 advisory.

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

    Security Fix(es):

    * squid: denial of service in HTTP header parser (CVE-2024-25617)

    * squid: denial of service in HTTP request parsing (CVE-2023-50269)

    * squid: Buffer over-read in the HTTP Message processing feature (CVE-2023-49285)

    * squid: Incorrect Check of Function Return Value In Helper Process management (CVE-2023-49286)

    * squid: NULL pointer dereference in the gopher protocol code (CVE-2023-46728)

    * squid: Denial of Service in SSL Certificate validation (CVE-2023-46724)

    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 these issues but has instead relied only on the application's self-reported version number.

The remote Debian 11 / 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5637 advisory.

    -----BEGIN PGP SIGNED MESSAGE-----     Hash: SHA512

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-5637-1                   security@debian.org     https://www.debian.org/security/                          Markus Koschany     March 08, 2024                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : squid     CVE ID         : CVE-2023-46724 CVE-2023-46846 CVE-2023-46847 CVE-2023-49285                      CVE-2023-49286 CVE-2023-50269 CVE-2024-23638 CVE-2024-25617                      CVE-2023-46848 CVE-2024-25111     Debian Bug     : 1055252 1054537 1055250 1055251 1058721

    Several security vulnerabilities have been discovered in Squid, a full featured     web proxy cache. Due to programming errors in Squid's HTTP request parsing,     remote attackers may be able to execute a denial of service attack by sending     large X-Forwarded-For header or trigger a stack buffer overflow while     performing HTTP Digest authentication. Other issues facilitate request     smuggling past a firewall or a denial of service against Squid's Helper process     management.

    In regard to CVE-2023-46728: Please note that support for the Gopher protocol     has simply been removed in future Squid versions. There are no plans by the     upstream developers of Squid to fix this issue. We recommend to reject all     Gopher URL requests instead.

    For the oldstable distribution (bullseye), these problems have been fixed     in version 4.13-10+deb11u3.

    For the stable distribution (bookworm), these problems have been fixed in     version 5.7-2+deb12u1.

    We recommend that you upgrade your squid packages.

    For the detailed security status of squid please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/squid

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org
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Tenable has extracted the preceding description block directly from the Debian 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	Name	Product	Family	Published	Updated	Severity
187863	Oracle Linux 9：squid (ELSA-2024-0071)	Nessus	Oracle Linux Local Security Checks	1/10/2024	9/9/2025	high
190403	RHEL 8：squid:4 (RHSA-2024:0773)	Nessus	Red Hat Local Security Checks	2/12/2024	8/27/2025	critical
193230	RHEL 7：squid (RHSA-2024:1787)	Nessus	Red Hat Local Security Checks	4/11/2024	1/10/2025	high
236724	Alibaba Cloud Linux 3 : 0020: squid:4 (ALINUX3-SA-2024:0020)	Nessus	Alibaba Cloud Linux Local Security Checks	5/14/2025	5/14/2025	high
187385	Fedora 39 : squid (2023-ab77331a34)	Nessus	Fedora Local Security Checks	12/28/2023	11/14/2024	high
187674	RHEL 9 : squid (RHSA-2024:0071)	Nessus	Red Hat Local Security Checks	1/8/2024	11/7/2024	high
187863	Oracle Linux 9 : squid (ELSA-2024-0071)	Nessus	Oracle Linux Local Security Checks	1/10/2024	9/9/2025	high
190403	RHEL 8 : squid:4 (RHSA-2024:0773)	Nessus	Red Hat Local Security Checks	2/12/2024	8/27/2025	critical
191868	EulerOS 2.0 SP8 : squid (EulerOS-SA-2024-1301)	Nessus	Huawei Local Security Checks	3/12/2024	3/12/2024	high
193230	RHEL 7 : squid (RHSA-2024:1787)	Nessus	Red Hat Local Security Checks	4/11/2024	1/10/2025	high
191759	Debian dsa-5637 : squid - security update	Nessus	Debian Local Security Checks	3/8/2024	1/24/2025	medium

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