CVE-2020-17519: Files or Directories Accessible to External Parties

January 5, 2021 (updated March 17, 2021)

A change introduced in Apache Flink (and released as well) allows attackers to read any file on the local filesystem of the JobManager through the REST interface of the JobManager process. Access is restricted to files accessible by the JobManager process. All users should upgrade to Flink if their Flink instance(s) are exposed.

References

packetstormsecurity.com/files/160849/Apache-Flink-1.11.0-Arbitrary-File-Read-Directory-Traversal.html
lists.apache.org/thread.html/r6843202556a6d0bce9607ebc02e303f68fc88e9038235598bde3b50d@%3Cannounce.apache.org%3E
nvd.nist.gov/vuln/detail/CVE-2020-17519

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