CISA KEV · Known exploitedHigh

CVE-2020-17519

Apache Flink

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: 7.5
EPSS: 97.9%
CISA KEV: Listed
Published: 2021.01.05

PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV

Exploit probability97.9%

Technical severityCVSS 7.5

Vulnerability overview

Affected product and versions

Product: Apache Flink
Affected versions: Apache Flink 1.11.0 to 1.11.2, 1.11.0, >= 1.11.0 < 1.11.3
Fixed versions: 1.11.3

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

CISA required action

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

Due date: 2024.06.13

1
Identify
Confirm that Apache Flink and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE: CWE-552
KEV added: 2024.05.23
Ransomware use: 미확인