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CVE-2020-17519: Apache Flink directory traversal attack: reading remote
files through the REST API
Vendor:
The Apache Software Foundation
Versions Affected:
1.11.0, 1.11.1, 1.11.2
Description:
A change introduced in Apache Flink 1.11.0 (and released in 1.11.1 and
1.11.2 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.
Mitigation:
All users should upgrade to Flink 1.11.3 or 1.12.0 if their Flink
instance(s) are exposed.
The issue was fixed in commit b561010b0ee741543c3953306037f00d7a9f0801 from
apache/flink:master.
Credits:
This issue was discovered by 0rich1 of Ant Security FG Lab
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