Rewterz Threat Advisory – CVE-2020-17519 – Apache Flink directory traversal

Severity

High

Analysis Summary

CVE-2020-17519

Apache Flink could allow a remote attacker to traverse directories on the system, caused by improper validation of user request by the REST API. An attacker could send a specially-crafted URL request containing “dot dot” sequences (/../) to read arbitrary files on the system.

Impact

Obtain Information

Affected Vendors

Apache

Affected Products

Apache Flink 1.11.0
Apache Flink 1.11.1
Apache Flink 1.11.2

Remediation

Upgrade to the latest version of Apache Flink (1.11.3, 1.12.0 or later).

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