Abdelrahman created FLINK-25394: ----------------------------------- Summary: [Flink-ML] Upgrade log4j to 2.17.0 to address CVE-2021-45105 Key: FLINK-25394 URL: https://issues.apache.org/jira/browse/FLINK-25394 Project: Flink Issue Type: Improvement Affects Versions: 1.14.2 Reporter: Abdelrahman
Apache Log4j2 versions 2.0-alpha1 through 2.16.0 did not protect from uncontrolled recursion from self-referential lookups. When the logging configuration uses a non-default Pattern Layout with a Context Lookup (for example, $${ctx:loginId}), attackers with control over Thread Context Map (MDC) input data can craft malicious input data that contains a recursive lookup, resulting in a StackOverflowError that will terminate the process. This is also known as a DOS (Denial of Service) attack. -- This message was sent by Atlassian Jira (v8.20.1#820001)