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Debian: Security Advisory for apache-log4j2 (DSA-5024-1)

Information

Severity

Severity

Medium

Family

Family

Debian Local Security Checks

CVSSv2 Base

CVSSv2 Base

5.0

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Solution Type

Solution Type

Vendor Patch

Created

Created

5 months ago

Modified

Modified

5 months ago

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Summary

The remote host is missing an update for the 'apache-log4j2' package(s) announced via the DSA-5024-1 advisory.

Insight

Insight

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.

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 2.17.0-1~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.

Common Vulnerabilities and Exposures (CVE)

References

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Citations 1. Costs and Consequences of Gaps in Vulnerability Response, Ponemom Institute 2. Cost of a Data Breach Report 2021, IBM

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