Abdelrahman-IK opened a new pull request #42:
URL: https://github.com/apache/flink-ml/pull/42
### Background:
As recently reported on apache.org
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.
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