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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.




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:

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.


Related notices

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