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AlmaLinux 9 : python-lxml (ALSA-2022:8226)

high Nessus Plugin ID 167999

Synopsis

The remote AlmaLinux host is missing a security update.

Description

The remote AlmaLinux 9 host has a package installed that is affected by a vulnerability as referenced in the ALSA-2022:8226 advisory.

 - NULL Pointer Dereference allows attackers to cause a denial of service (or application crash). This only applies when lxml is used together with libxml2 2.9.10 through 2.9.14. libxml2 2.9.9 and earlier are not affected. It allows triggering crashes through forged input data, given a vulnerable code sequence in the application. The vulnerability is caused by the iterwalk function (also used by the canonicalize function). Such code shouldn't be in wide-spread use, given that parsing + iterwalk would usually be replaced with the more efficient iterparse function. However, an XML converter that serialises to C14N would also be vulnerable, for example, and there are legitimate use cases for this code sequence. If untrusted input is received (also remotely) and processed via iterwalk function, a crash can be triggered.
 (CVE-2022-2309)

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

Solution

Update the affected python3-lxml package.

See Also

https://errata.almalinux.org/9/ALSA-2022-8226.html

Plugin Details

Severity: High

ID: 167999

File Name: alma_linux_ALSA-2022-8226.nasl

Version: 1.3

Type: local

Published: 11/19/2022

Updated: 10/3/2023

Supported Sensors: Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

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

CVSS Score Source: CVE-2022-2309

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

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

Vulnerability Information

CPE: p-cpe:/a:alma:linux:python3-lxml, cpe:/o:alma:linux:9::appstream, cpe:/o:alma:linux:9

Required KB Items: Host/local_checks_enabled, Host/AlmaLinux/release, Host/AlmaLinux/rpm-list, Host/cpu

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/15/2022

Vulnerability Publication Date: 7/5/2022

Reference Information

CVE: CVE-2022-2309

CWE: 476