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.
Published 2021-01-05 12:15:13
Updated 2025-02-13 16:47:52
View at NVD,   CVE.org

Products affected by CVE-2020-17519

CVE-2020-17519 is in the CISA Known Exploited Vulnerabilities Catalog

CISA vulnerability name:
Apache Flink Improper Access Control Vulnerability
CISA required action:
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CISA description:
Apache Flink contains an improper access control vulnerability that allows an attacker to read any file on the local filesystem of the JobManager through its REST interface.
Notes:
This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. Please check with specific vendors for information on patching status. For more information, please see: https://lists.apache.org/thread/typ0h03zyfrzjqlnb7plh64df1g2383d; https:/
Added on 2024-05-23 Action due date 2024-06-13

Exploit prediction scoring system (EPSS) score for CVE-2020-17519

97.23%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 100 %
Percentile, the proportion of vulnerabilities that are scored at or less

Metasploit modules for CVE-2020-17519

  • Apache Flink JobManager Traversal
    Disclosure Date: 2021-01-05
    First seen: 2021-03-12
    auxiliary/scanner/http/apache_flink_jobmanager_traversal
    This module exploits an unauthenticated directory traversal vulnerability in Apache Flink versions 1.11.0 <= 1.11.2. The JobManager REST API fails to validate user-supplied log file paths, allowing retrieval of arbitrary files with the privileges of the web s

CVSS scores for CVE-2020-17519

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.0
MEDIUM AV:N/AC:L/Au:N/C:P/I:N/A:N
10.0
2.9
NIST
9.1
CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
3.9
5.2
134c704f-9b21-4f2e-91b3-4a467353bcc0 2024-07-03
7.5
HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
3.9
3.6
NIST

CWE ids for CVE-2020-17519

References for CVE-2020-17519

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