========================================================================== Ubuntu Security Notice USN-5223-1 January 12, 2022
apache-log4j1.2 vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 21.10 - Ubuntu 21.04 - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS Summary: Apache Log4j 1.2 could be made to crash or run programs if it received specially crafted input. Software Description: - 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 LTS: liblog4j1.2-java 1.2.17-9ubuntu0.1 Ubuntu 18.04 LTS: liblog4j1.2-java 1.2.17-8+deb10u1ubuntu0.1 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-5223-1 CVE-2021-4104 Package Information: https://launchpad.net/ubuntu/+source/apache-log4j1.2/1.2.17-10ubuntu0.21.10.1 https://launchpad.net/ubuntu/+source/apache-log4j1.2/1.2.17-10ubuntu0.21.04.1 https://launchpad.net/ubuntu/+source/apache-log4j1.2/1.2.17-9ubuntu0.1 https://launchpad.net/ubuntu/+source/apache-log4j1.2/1.2.17-8+deb10u1ubuntu0.1
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