USN-5222-1: Apache Log4j 2 vulnerabilities
11 January 2022
Several security issues were fixed in Apache Log4j 2.
- apache-log4j2 - Apache Log4j - Logging Framework for Java
It was discovered that Apache Log4j 2 was vulnerable to remote code
execution (RCE) attack when configured to use a JDBC Appender with a
JNDI LDAP data source URI. A remote attacker could possibly use this issue to
cause a crash, leading to a denial of service. (CVE-2021-44832)
Hideki Okamoto and Guy Lederfein discovered that Apache Log4j 2 did not
protect against infinite recursion in lookup evaluation. A remote attacker
could possibly use this issue to cause Apache Log4j 2 to crash, leading to
a denial of service. This issue only affected Ubuntu 18.04 LTS.
The problem can be corrected by updating your system to the following package versions:
In general, a standard system update will make all the necessary changes.
- USN-5203-1: liblog4j2-java, apache-log4j2, liblog4j2-java-doc