Debian DLA-2669-1 : libxml2 security update

medium Nessus Plugin ID 150111

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Synopsis

The remote Debian host is missing a security update.

Description

An issue has been found in libxml2, the GNOME XML library. This issue is called 'Parameter Laughs'-attack and is related to parameter entities expansion. It is similar to the 'Billion Laughs'-attacks found earlier in libexpat. More information can be found at [1]

[1] https://blog.hartwork.org/posts/cve-2021-3541-parameter-laughs-fixed-i n-libxml2-2-9-11/

For Debian 9 stretch, this problem has been fixed in version 2.9.4+dfsg1-2.2+deb9u5.

We recommend that you upgrade your libxml2 packages.

For the detailed security status of libxml2 please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/libxml2

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Upgrade the affected packages.

Plugin Details

Severity: Medium

ID: 150111

File Name: debian_DLA-2669.nasl

Version: 1.4

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 6/1/2021

Updated: 7/14/2021

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

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3

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

CVSS Score Source: CVE-2021-3541

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:python3-libxml2-dbg, p-cpe:/a:debian:debian_linux:python3-libxml2, p-cpe:/a:debian:debian_linux:libxml2-utils, p-cpe:/a:debian:debian_linux:libxml2-dbg, p-cpe:/a:debian:debian_linux:libxml2-utils-dbg, p-cpe:/a:debian:debian_linux:libxml2-dev, cpe:/o:debian:debian_linux:9.0, p-cpe:/a:debian:debian_linux:libxml2, p-cpe:/a:debian:debian_linux:python-libxml2, p-cpe:/a:debian:debian_linux:libxml2-doc, p-cpe:/a:debian:debian_linux:python-libxml2-dbg

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/30/2021

Vulnerability Publication Date: 7/9/2021

Reference Information

CVE: CVE-2021-3541

Detections

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