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Slackware Linux 14.0 / 14.1 / 14.2 / 15.0 / current libxml2 Multiple Vulnerabilities (SSA:2023-343-01)

high Nessus Plugin ID 186706

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Synopsis

The remote Slackware Linux host is missing a security update to libxml2.

Description

The version of libxml2 installed on the remote host is prior to 2.12.2. It is, therefore, affected by multiple vulnerabilities as referenced in the SSA:2023-343-01 advisory.

 - An issue was discovered in libxml2 before 2.10.3. When parsing a multi-gigabyte XML document with the XML_PARSE_HUGE parser option enabled, several integer counters can overflow. This results in an attempt to access an array at a negative 2GB offset, typically leading to a segmentation fault. (CVE-2022-40303)

 - An issue was discovered in libxml2 before 2.10.3. Certain invalid XML entity definitions can corrupt a hash table key, potentially leading to subsequent logic errors. In one case, a double-free can be provoked. (CVE-2022-40304)

 - In libxml2 before 2.10.4, parsing of certain invalid XSD schemas can lead to a NULL pointer dereference and subsequently a segfault. This occurs in xmlSchemaFixupComplexType in xmlschemas.c. (CVE-2023-28484)

 - An issue was discovered in libxml2 before 2.10.4. When hashing empty dict strings in a crafted XML document, xmlDictComputeFastKey in dict.c can produce non-deterministic values, leading to various logic and memory errors, such as a double free. This behavior occurs because there is an attempt to use the first byte of an empty string, and any value is possible (not solely the '\0' value). (CVE-2023-29469)

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

Solution

Upgrade the affected libxml2 package.

See Also

http://www.nessus.org/u?fed58791

Plugin Details

Severity: High

ID: 186706

File Name: Slackware_SSA_2023-343-01.nasl

Version: 1.0

Type: local

Published: 12/9/2023

Updated: 12/9/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2022-40304

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:slackware:slackware_linux:14.2, cpe:/o:slackware:slackware_linux:15.0, cpe:/o:slackware:slackware_linux:14.1, p-cpe:/a:slackware:slackware_linux:libxml2, cpe:/o:slackware:slackware_linux, cpe:/o:slackware:slackware_linux:14.0

Required KB Items: Host/local_checks_enabled, Host/Slackware/release, Host/Slackware/packages

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 12/9/2023

Vulnerability Publication Date: 10/20/2022

Reference Information

CVE: CVE-2022-40303, CVE-2022-40304, CVE-2023-28484, CVE-2023-29469