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Debian dla-3783 : expat - security update

high Nessus Plugin ID 193076

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Synopsis

The remote Debian host is missing a security-related update.

Description

The remote Debian 10 host has packages installed that are affected by a vulnerability as referenced in the dla-3783 advisory.

 ------------------------------------------------------------------------- Debian LTS Advisory DLA-3783-1 [email protected] https://www.debian.org/lts/security/ Tobias Frost April 07, 2024 https://wiki.debian.org/LTS
 -------------------------------------------------------------------------

 Package : expat Version : 2.2.6-2+deb10u7 CVE ID : CVE-2023-52425 Debian Bug : 1063238

 Expat, an XML parsing C library has been found to have an vulnerability that allows an attacker to perform a denial of service (resource consumption, when many full reparsings are required in the case of a large tokens.

 When parsing a really big token that requires multiple buffer fills to complete, expat has to re-parse the token from start multiple times, which takes time. These patches introduce a heuristic that, when having failed on the same token multiple times, defers further parsing until there's significantly more data available.

 The patch also introduces an optiional API, XML_SetReparseDeferralEnabled(), to disable the new heuristic.

 For Debian 10 buster, this problem has been fixed in version 2.2.6-2+deb10u7.

 We recommend that you upgrade your expat packages.

 For the detailed security status of expat please refer to its security tracker page at:
 https://security-tracker.debian.org/tracker/expat

 Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS Attachment:
 signature.asc Description: PGP signature

Tenable has extracted the preceding description block directly from the Debian security advisory.

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

Solution

Upgrade the expat packages.

See Also

https://security-tracker.debian.org/tracker/source-package/expat

https://security-tracker.debian.org/tracker/CVE-2023-52425

https://packages.debian.org/source/buster/expat

Plugin Details

Severity: High

ID: 193076

File Name: debian_DLA-3783.nasl

Version: 1.1

Type: local

Agent: unix

Published: 4/9/2024

Updated: 1/22/2025

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

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

CVSS Score Source: CVE-2023-52425

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: cpe:/o:debian:debian_linux:10.0, p-cpe:/a:debian:debian_linux:expat, p-cpe:/a:debian:debian_linux:libexpat1-dev, p-cpe:/a:debian:debian_linux:libexpat1

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/7/2024

Vulnerability Publication Date: 2/4/2024

Reference Information

CVE: CVE-2023-52425

IAVA: 2024-A-0134-S