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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.

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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

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

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.

References

Related notices

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

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Further reading