TencentOS Server 3: mingw-expat (TSSA-2023:0142)

high Nessus Plugin ID 239666

Synopsis

The remote TencentOS Server 3 host is missing one or more security updates.

Description

The version of Tencent Linux installed on the remote TencentOS Server 3 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2023:0142 advisory.

Package updates are available for TencentOS Server 3 that fix the following vulnerabilities:

CVE-2022-40674:
A vulnerability was found in expat. With this flaw, it is possible to create a situation in which parsing is suspended while substituting in an internal entity so that XML_ResumeParser directly uses the internalEntityProcessor as its processor. If the subsequent parse includes some unclosed tags, this will return without calling storeRawNames to ensure that the raw versions of the tag names are stored in memory other than the parse buffer itself. Issues occur if the parse buffer is changed or reallocated (for example, if processing a file line by line), problems occur. Using this vulnerability in the doContent function allows an attacker to triage a denial of service or potentially arbitrary code execution.

CVE-2022-25236:
A flaw was found in expat. Passing one or more namespace separator characters in the xmlns[:prefix] attribute values made expat send malformed tag names to the XML processor on top of expat. This issue causes arbitrary code execution depending on how unexpected cases are handled inside the XML processor.

CVE-2022-25235:
A flaw was found in expat. Passing malformed 2- and 3-byte UTF-8 sequences (for example, from start tag names) to the XML processing application on top of expat can lead to arbitrary code execution. This issue is dependent on how invalid UTF-8 is handled inside the XML processor.

CVE-2022-25313:
A flaw was found in expat. A stack exhaustion in doctype parsing could be triggered by a file with a large number of opening braces, resulting in a denial of service.

CVE-2022-25314:
An integer overflow flaw was found in expat. This issue affects the encoding name parameter at the parser creation time, which is often hard-coded (rather than user input), takes a value in the gigabytes to trigger, and on a 64-bit machine. This flaw can cause a denial of service.

CVE-2022-25315:
An integer overflow was found in expat. The issue occurs in storeRawNames() by abusing the m_buffer expansion logic to allow allocations very close to INT_MAX and out-of-bounds heap writes. This flaw can cause a denial of service or potentially arbitrary code execution.

CVE-2018-20843:
It was discovered that the setElementTypePrefix() function incorrectly extracted XML namespace prefixes. By tricking an application into processing a specially crafted XML file, an attacker could cause unusually high consumption of memory resources and possibly lead to a denial of service.

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: 239666

File Name: tencentos_TSSA_2023_0142.nasl

Version: 1.1

Type: local

Family: Tencent Local Security Checks

Published: 6/16/2025

Updated: 6/16/2025

Supported Sensors: Nessus

Vulnerability Information

CPE: p-cpe:/a:tencent:tencentos_server:mingw-expat, cpe:/o:tencent:tencentos_server:3

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

Exploit Ease: No known exploits are available

Patch Publication Date: 7/13/2023

Vulnerability Publication Date: 7/13/2023

Detections

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