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Debian LTS: Security Advisory for apache-log4j2 (DLA-2852-1)

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

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 DLA-2852-1 advisory.

Insight

Insight

Several security vulnerabilities were found in Apache Log4j2, a Logging Framework for Java, which could lead to a denial of service or information disclosure. CVE-2020-9488 Improper validation of certificate with host mismatch in Apache Log4j SMTP appender. This could allow an SMTPS connection to be intercepted by a man-in-the-middle attack which could leak any log messages sent through that appender. CVE-2021-45105 Apache Log4j2 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.

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 Debian 9 stretch, these problems have been fixed in version 2.12.3-0+deb9u1. We recommend that you upgrade your apache-log4j2 packages.

Common Vulnerabilities and Exposures (CVE)