Improper Input Validation Affecting apache-log4j2 package, versions <2.17.0-1~deb10u1


0.0
medium

Snyk CVSS

    Attack Complexity High
    Availability High

    Threat Intelligence

    EPSS 96.26% (100th percentile)
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NVD
5.9 medium
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Red Hat
5.9 medium

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  • Snyk ID SNYK-DEBIAN10-APACHELOG4J2-2321891
  • published 19 Dec 2021
  • disclosed 18 Dec 2021

How to fix?

Upgrade Debian:10 apache-log4j2 to version 2.17.0-1~deb10u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream apache-log4j2 package and not the apache-log4j2 package as distributed by Debian. See How to fix? for Debian:10 relevant fixed versions and status.

Apache Log4j2 versions 2.0-alpha1 through 2.16.0 (excluding 2.12.3 and 2.3.1) did not protect from uncontrolled recursion from self-referential lookups. This allows an attacker with control over Thread Context Map data to cause a denial of service when a crafted string is interpreted. This issue was fixed in Log4j 2.17.0, 2.12.3, and 2.3.1.