An update of the squid package has been released.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2023-429 advisory.

    2023-12-06: CVE-2023-46728 was added to this advisory.

    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)

    Due to chunked decoder lenience Squid is vulnerable to Request/Response smuggling attacks when parsing     HTTP/1.1 and ICAP messages. (CVE-2023-46846)

    This problem allows a remote client to perform Denial of Service when sending ftp:// URLs in HTTP Request     messages or constructing ftp:// URLs from FTP Native input.

    This issue is triggered during access control security checks, meaning clients may not have been permitted     to use the proxy yet.

    FTP support is always enabled and cannot be disabled completely. (CVE-2023-46848)

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 AlmaLinux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the ALSA-2023:6266 advisory.

  - SQUID is vulnerable to HTTP request smuggling, caused by chunked decoder lenience, allows a remote     attacker to perform Request/Response smuggling past firewall and frontend security systems.
    (CVE-2023-46846)

  - Squid is vulnerable to a Denial of Service, where a remote attacker can perform buffer overflow attack by     writing up to 2 MB of arbitrary data to heap memory when Squid is configured to accept HTTP Digest     Authentication. (CVE-2023-46847)

  - Squid is vulnerable to Denial of Service, where a remote attacker can perform DoS by sending ftp:// URLs     in HTTP Request messages or constructing ftp:// URLs from FTP Native input. (CVE-2023-46848)

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.

The remote SUSE Linux SLES15 / SLES_SAP15 / openSUSE 15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2023:4380-1 advisory.

    - CVE-2023-46846: Request/Response smuggling in HTTP/1.1 and ICAP (bsc#1216500).
    - CVE-2023-46847: Denial of Service in HTTP Digest Authentication (bsc#1216495).
    - CVE-2023-46724: Fix validation of certificates with CN=* (bsc#1216803).
    - CVE-2023-46848: Denial of Service in FTP (bsc#1216498).

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 SLES15 / SLES_SAP15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2023:4384-1 advisory.

  - 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 vulnerable to HTTP request smuggling, caused by chunked decoder lenience, allows a remote     attacker to perform Request/Response smuggling past firewall and frontend security systems.
    (CVE-2023-46846)

  - Squid is vulnerable to a Denial of Service, where a remote attacker can perform buffer overflow attack by     writing up to 2 MB of arbitrary data to heap memory when Squid is configured to accept HTTP Digest     Authentication. (CVE-2023-46847)

  - Squid is vulnerable to Denial of Service, where a remote attacker can perform DoS by sending ftp:// URLs     in HTTP Request messages or constructing ftp:// URLs from FTP Native input. (CVE-2023-46848)

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-2023:6266 advisory.

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

    Security Fix(es):

    * SQUID-2023:3 squid: Denial of Service in HTTP Digest Authentication (CVE-2023-46847)

    * SQUID-2023:1 squid: Request/Response smuggling in HTTP/1.1 and ICAP (CVE-2023-46846)

    * SQUID-2023:5 squid: denial of Service in FTP (CVE-2023-46848)

    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 Rocky Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2023:6266 advisory.

  - SQUID is vulnerable to HTTP request smuggling, caused by chunked decoder lenience, allows a remote     attacker to perform Request/Response smuggling past firewall and frontend security systems.
    (CVE-2023-46846)

  - Squid is vulnerable to a Denial of Service, where a remote attacker can perform buffer overflow attack by     writing up to 2 MB of arbitrary data to heap memory when Squid is configured to accept HTTP Digest     Authentication. (CVE-2023-46847)

  - Squid is vulnerable to Denial of Service, where a remote attacker can perform DoS by sending ftp:// URLs     in HTTP Request messages or constructing ftp:// URLs from FTP Native input. (CVE-2023-46848)

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

The version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2024:0039 advisory.

    Package updates are available for TencentOS Server 4 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-2023-46846:
    SQUID is vulnerable to HTTP request smuggling, caused by chunked decoder lenience, allows a remote     attacker to perform Request/Response smuggling past firewall and frontend security systems.

    CVE-2023-46847:
    Squid is vulnerable to a Denial of Service,  where a remote attacker can perform buffer overflow attack by     writing up to 2 MB of arbitrary data to heap memory when Squid is configured to accept HTTP Digest     Authentication.

    CVE-2023-46848:
    Squid is vulnerable to Denial of Service,  where a remote attacker can perform DoS by sending ftp:// URLs     in HTTP Request messages or constructing ftp:// URLs from FTP Native input.

    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-2023-5824:
    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 Tencent 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 MiracleLinux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the AXSA:2023-6560:03 advisory.

    * SQUID-2023:3 squid: Denial of Service in HTTP Digest Authentication (CVE-2023-46847)
      * SQUID-2023:1 squid: Request/Response smuggling in HTTP/1.1 and ICAP (CVE-2023-46846)
      * SQUID-2023:5 squid: denial of Service in FTP (CVE-2023-46848)

Tenable has extracted the preceding description block directly from the MiracleLinux 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
204419	Photon OS 5.0: Squid PHSA-2023-5.0-0154	Nessus	PhotonOS Local Security Checks	2024/7/24	2024/7/24	medium
185721	Amazon Linux 2023 : squid (ALAS2023-2023-429)	Nessus	Amazon Linux Local Security Checks	2023/11/15	2024/12/11	medium
184354	AlmaLinux 9 : squid (ALSA-2023:6266)	Nessus	Alma Linux Local Security Checks	2023/11/3	2023/12/15	medium
191759	Debian dsa-5637 : squid - security update	Nessus	Debian Local Security Checks	2024/3/8	2025/1/24	medium
184793	SUSE SLES15 / openSUSE 15 Security Update : squid (SUSE-SU-2023:4380-1)	Nessus	SuSE Local Security Checks	2023/11/7	2026/6/26	medium
185421	SUSE SLES15 Security Update : squid (SUSE-SU-2023:4384-1)	Nessus	SuSE Local Security Checks	2023/11/9	2023/12/15	medium
184205	RHEL 9 : squid (RHSA-2023:6266)	Nessus	Red Hat Local Security Checks	2023/11/2	2025/3/6	medium
185472	Rocky Linux 9 : squid (RLSA-2023:6266)	Nessus	Rocky Linux Local Security Checks	2023/11/11	2023/12/15	medium
239315	TencentOS Server 4: squid (TSSA-2024:0039)	Nessus	Tencent Local Security Checks	2025/6/16	2025/11/20	medium
293581	MiracleLinux 9 : squid-5.5-5.el9.1 (AXSA:2023-6560:03)	Nessus	Miracle Linux Local Security Checks	2026/1/20	2026/1/20	medium

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