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Debian: Security Advisory for apache-log4j2 (DSA-5022-1)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
The remote host is missing an update for the 'apache-log4j2' package(s) announced via the DSA-5022-1 advisory.
Insight
Insight
It was found that the fix to address CVE-2021-44228 in Apache Log4j, a Logging Framework for Java, was incomplete in certain non-default configurations. This could allow attackers with control over Thread Context Map (MDC) input data when the logging configuration uses a non-default Pattern Layout with either a Context Lookup (for example, $${ctx:loginId}) or a Thread Context Map pattern (%X, %mdc, or %MDC) to craft malicious input data using a JNDI Lookup pattern resulting in a denial of service (DOS) attack.
Affected Software
Affected Software
'apache-log4j2' package(s) on Debian Linux.
Detection Method
Detection Method
Checks if a vulnerable package version is present on the target host.
Solution
Solution
For the oldstable distribution (buster), this problem has been fixed in version 2.16.0-1~deb10u1. For the stable distribution (bullseye), this problem has been fixed in version 2.16.0-1~deb11u1. We recommend that you upgrade your apache-log4j2 packages.