TencentOS Server 2: squid (TSSA-2025:0788)

high Nessus Plugin ID 271120

Synopsis

The remote TencentOS Server 2 host is missing one or more security updates.

Description

The version of Tencent Linux installed on the remote TencentOS Server 2 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2025:0788 advisory.

Package updates are available for TencentOS Server 2 that fix the following vulnerabilities:

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-2025-54574:
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.

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.

Solution

Update the affected packages.

Plugin Details

Severity: High

ID: 271120

File Name: tencentos_TSSA_2025_0788.nasl

Version: 1.1

Type: local

Family: Tencent Local Security Checks

Published: 10/22/2025

Updated: 10/22/2025

Supported Sensors: Nessus

Vulnerability Information

CPE: cpe:/o:tencent:tencentos_server:2, p-cpe:/a:tencent:tencentos_server:squid

Required KB Items: Host/local_checks_enabled, Host/etc/os-release, Host/TencentOS/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 8/25/2025

Vulnerability Publication Date: 8/25/2025

Detections

Analytics