USN-5192-1: Apache Log4j 2 vulnerability

Releases

• Ubuntu 21.10
• Ubuntu 21.04
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM

Packages

• apache-log4j2 - Apache Log4j - Logging Framework for Java

Details

Chen Zhaojun discovered that Apache Log4j 2 allows remote attackers to run
programs via a special crafted input. An attacker could use this vulnerability
to cause a denial of service or possibly execute arbitrary code.
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

• liblog4j2-java - 2.15.0-0.21.10.1

Ubuntu 21.04

• liblog4j2-java - 2.15.0-0.21.04.1

Ubuntu 20.04

• liblog4j2-java - 2.15.0-0.20.04.1

Ubuntu 18.04

• liblog4j2-java - 2.10.0-2ubuntu0.1

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

References

• CVE-2021-44228

Related notices

• USN-5197-1: liblog4j2-java, apache-log4j2, liblog4j2-java-doc
• USN-5192-2: liblog4j2-java, apache-log4j2, liblog4j2-java-doc