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Debian: Security Advisory for apache-log4j2 (DSA-5022-1)

Information

Severity

Severity

Critical

Family

Family

Debian Local Security Checks

CVSSv2 Base

CVSSv2 Base

9.3

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:M/Au:N/C:C/I:C/A:C

Solution Type

Solution Type

Vendor Patch

Created

Created

2 years ago

Modified

Modified

2 years ago

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.

Common Vulnerabilities and Exposures (CVE)