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USN-5197-1: Apache Log4j 2 vulnerability

15 December 2021

Apache Log4j 2 could be made to crash if it received specially crafted input.

Releases

Packages

Details

It was found that the fix to address CVE-2021-44228 in Apache Log4j 2.15.0 was
incomplete in certain non-default configurations. An attacker could use this
vulnerability to cause a denial of service.
Please see the following link for more information:
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/Log4Shell

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 21.10
Ubuntu 21.04
Ubuntu 20.04

In general, a standard system update will make all the necessary changes.

Related notices

  • USN-5192-1: liblog4j2-java-doc, liblog4j2-java, apache-log4j2
  • USN-5192-2: liblog4j2-java-doc, liblog4j2-java, apache-log4j2