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CVE-2020-17519: Apache Flink directory traversal attack: reading remote files through the REST API

Critical · CVSS 9.1 (CVSS 3.1)KEV known exploitedEPSS 97.8%, 100th percentilePublished Updated Assigner: apache

In CISA’s Known Exploited Vulnerabilities catalog: Apache Flink Improper Access Control Vulnerability.

Added , federal remediation due . Known ransomware use: Unknown.

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

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. 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.

Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H · CWE-552

Status incidents that name it

No tracked status incident names this CVE.

Affected vendors and products

apache: flinkApache Software Foundation: Apache Flink

References

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