Squid is a caching proxy for the Web. In versions 6.3 and below, Squid is vulnerable to a heap buffer overflow and possible remote code execution attack when processing URN due to incorrect buffer management. This has been fixed in version 6.4. To work around this issue, disable URN access permissions.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2025:14414 advisory.

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

    Security Fix(es):

    * squid: denial of service in URN processing (CVE-2021-28651)

    * squid-cache: Squid Buffer Overflow (CVE-2025-54574)

    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 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5982 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-5982-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     August 21, 2025                       https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : squid     CVE ID         : CVE-2023-5824 CVE-2025-54574

    Two security issues were discovered in the Squid proxy caching server,     which could result in the execution of arbitrary code, information     disclosure or denial of service.

    For the oldstable distribution (bookworm), these problems have been fixed     in version 5.7-2+deb12u3.

    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

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

  - Squid is a caching proxy for the Web. In versions 6.3 and below, Squid is vulnerable to a heap buffer     overflow and possible remote code execution attack when processing URN due to incorrect buffer management.
    This has been fixed in version 6.4. To work around this issue, disable URN access permissions.
    (CVE-2025-54574)

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

According to its self-reported version number,the version of Squidcinstalled on the remote host is 5.x < 5.0.4 or prior to 4.13. It is, therefore, affected by a heap buffer overflow and possible remote code execution attack when processing URN.

Note that the scanner 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-2024:1153 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-18248)

    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 Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:0771 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-18255)

    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 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.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:0772 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-18253)

    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 Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:0397 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 (JIRA:RHEL-18256)

    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 Redhat Enterprise Linux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2024:0072 advisory.

    Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, 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)

    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 Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2023:7668 advisory.

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

    Security Fix(es):

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

    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 Redhat Enterprise Linux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2023:7465 advisory.

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

    Security Fix(es):

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

    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.

ID	Name	Product	Family	Severity
254409	RHEL 7 : squid (RHSA-2025:14414)	Nessus	Red Hat Local Security Checks	high
253521	Debian dsa-5982 : squid - security update	Nessus	Debian Local Security Checks	high
251576	Linux Distros Unpatched Vulnerability : CVE-2025-54574	Nessus	Misc.	critical
114931	Squid < 6.4 Remote Code Execution	Web App Scanning	Component Vulnerability	critical
191572	RHEL 9 : squid (RHSA-2024:1153)	Nessus	Red Hat Local Security Checks	high
190404	RHEL 8 : squid:4 (RHSA-2024:0771)	Nessus	Red Hat Local Security Checks	high
190403	RHEL 8 : squid:4 (RHSA-2024:0773)	Nessus	Red Hat Local Security Checks	high
190402	RHEL 8 : squid:4 (RHSA-2024:0772)	Nessus	Red Hat Local Security Checks	high
189652	RHEL 8 : squid:4 (RHSA-2024:0397)	Nessus	Red Hat Local Security Checks	high
187675	RHEL 9 : squid (RHSA-2024:0072)	Nessus	Red Hat Local Security Checks	high
186618	RHEL 8 : squid:4 (RHSA-2023:7668)	Nessus	Red Hat Local Security Checks	high
186195	RHEL 9 : squid (RHSA-2023:7465)	Nessus	Red Hat Local Security Checks	high

Detections

Analytics

CVE-2025-54574

critical

Tenable Plugins

high

high

critical

critical

high

high

high

high

high

high

high

high