USN-5192-1: Apache Log4j 2 vulnerability
14 December 2021
Apache Log4j 2 could be made to crash or run programs as an administrator if it received a specially crafted input.
Releases
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
Ubuntu 21.04
Ubuntu 20.04
Ubuntu 18.04
In general, a standard system update will make all the necessary changes.
References
Related notices
- USN-5197-1: apache-log4j2, liblog4j2-java, liblog4j2-java-doc
- USN-5192-2: apache-log4j2, liblog4j2-java, liblog4j2-java-doc