USN-5223-1: Apache Log4j 1.2 vulnerability

Releases

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

Packages

• apache-log4j1.2 - Java-based open-source logging tool

Details

It was discovered that Apache Log4j 1.2 was vulnerable to deserialization of
untrusted data if the configuration file was editable. An attacker could use
this vulnerability to cause a DoS or possibly execute arbitrary code.

Update instructions

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

Ubuntu 21.10

• liblog4j1.2-java - 1.2.17-10ubuntu0.21.10.1

Ubuntu 21.04

• liblog4j1.2-java - 1.2.17-10ubuntu0.21.04.1

Ubuntu 20.04

• liblog4j1.2-java - 1.2.17-9ubuntu0.1

Ubuntu 18.04

• liblog4j1.2-java - 1.2.17-8+deb10u1ubuntu0.1

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

References

• CVE-2021-4104

Related notices

• USN-5223-2: liblog4j1.2-java, apache-log4j1.2, liblog4j1.2-java-doc