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Debian DSA-5024-1 : apache-log4j2 - security update

medium Nessus Plugin ID 156189

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Synopsis

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

Description

The remote Debian 10 / 11 host has a package installed that is affected by a vulnerability as referenced in the dsa-5024 advisory.

 It was found that Apache Log4j2, a Logging Framework for Java, did not protect from uncontrolled recursion from self-referential lookups. When the logging configuration uses a non-default Pattern Layout with a Context Lookup (for example, $${ctx:loginId}), attackers with control over Thread Context Map (MDC) input data can craft malicious input data that contains a recursive lookup, resulting in a denial of service.
 For the oldstable distribution (buster), this problem has been fixed in version 2.17.0-1~deb10u1. For the stable distribution (bullseye), this problem has been fixed in version 2.17.0-1~deb11u1. We recommend that you upgrade your apache-log4j2 packages. For the detailed security status of apache-log4j2 please refer to its security tracker page at: https://security-tracker.debian.org/tracker/apache-log4j2

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 apache-log4j2 packages.

For the stable distribution (bullseye), this problem has been fixed in version 2.17.0-1~deb11u1.

See Also

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1001891

http://www.nessus.org/u?a7f9f2b8

https://www.debian.org/security/2021/dsa-5024

https://security-tracker.debian.org/tracker/CVE-2021-45105

https://packages.debian.org/source/buster/apache-log4j2

https://packages.debian.org/source/bullseye/apache-log4j2

Plugin Details

Severity: Medium

ID: 156189

File Name: debian_DSA-5024.nasl

Version: 1.6

Type: local

Agent: unix

Published: 12/19/2021

Updated: 1/24/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.6

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.7

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

CVSS Score Source: CVE-2021-45105

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.7

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

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:10.0, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:liblog4j2-java

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: 12/18/2021

Vulnerability Publication Date: 12/18/2021

Reference Information

CVE: CVE-2021-45105

IAVA: 2021-A-0573