A deserialization flaw was found in Apache log4j 1.2.x. While reading serialized log events, they are improperly deserialized.
Note this is the same as CVE-2020-9493 which identified a deserialization issue in Apache Chainsaw. Prior to Chainsaw V2.0, Chainsaw was a component of Apache Log4j 1.2.x.
References:
https://www.openwall.com/lists/oss-security/2022/01/18/5