CVE-2020-17519 - CVE House

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Status published Unknown CVE-2020-17519

Apache Flink directory traversal attack: reading remote files through the REST API

0 CVSS

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

0rich1 of Ant Security FG Lab

References

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Affected Vendor

Apache Software Foundation

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Affected Software

Apache Flink

Vulnerable Versions:

Apache Flink 1.11.0 to 1.11.2

Timeline

Official Publish: January 5th, 2021

Last Modified: October 21st, 2025

Added to House: July 21st, 2026

CVSS Vectors

No vector data available

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application

T1083 File and Directory Discovery

T1005 Data from Local System

T1041 Exfiltration Over C2 Channel

T1565 Data Manipulation