CVE-2020-17519

HIGH7.5

CISA KEV

Published 2021-01-05 · Updated 2026-06-17 · Source security@apache.org

Summary

CVE-2020-17519 is a high-severity (CVSS 7.5) vulnerability in Apache Flink. CISA added it to the Known Exploited Vulnerabilities catalog on May 23, 2024, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by June 13, 2024. CISA does not currently list it as used in ransomware campaigns. Apache has 41 vulnerabilities in the KEV catalog, 8 of them linked to ransomware.

All 41 known-exploited Apache vulnerabilities →

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.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CWE-552CWE-552

CISA Known-Exploited Vulnerability

Product: Apache — Flink

Name: Apache Flink Improper Access Control Vulnerability

Date added: 2024-05-23 · Due: 2024-06-13

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

References

View on NVD

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