CVE-2020-17519
Apache Flink directory traversal attack: reading remote files through the REST API
- State
- Published
- Severity
- 9.1 Critical
- Published
- Jan 5, 2021
- Updated
- Oct 21, 2025
- Reserved
- Aug 12, 2020
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.1 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H | CISA-ADP |
Weaknesses
- CWE-552 Files or Directories Accessible to External Parties
Affected Products
| Product | Versions |
|---|---|
Apache FlinkApache Software Foundation |
|
References
- https://lists.apache.org/thread.html/r6843202556a6d0bce9607ebc02e303f68fc88e9038235598bde3b50d%40%3Cdev.flink.apache.org%3E
- [flink-user] 20210105 [CVE-2020-17519] Apache Flink directory traversal attack: reading remote files through the REST APImailing-list
- [announce] 20210105 [CVE-2020-17519] Apache Flink directory traversal attack: reading remote files through the REST APImailing-list
- [oss-security] 20210105 [CVE-2020-17519] Apache Flink directory traversal attack: reading remote files through the REST APImailing-list
- [flink-issues] 20210106 [GitHub] [flink-web] zentol commented on a change in pull request #408: Add security page for Flinkmailing-list
- http://packetstormsecurity.com/files/160849/Apache-Flink-1.11.0-Arbitrary-File-Read-Directory-Traversal.html
- [flink-issues] 20210110 [jira] [Updated] (FLINK-20916) Typo in test for CVE-2020-17519mailing-list
- [flink-dev] 20210110 [jira] [Created] (FLINK-20916) Typo in test for CVE-2020-17519mailing-list
- [flink-issues] 20210110 [jira] [Created] (FLINK-20916) Typo in test for CVE-2020-17519mailing-list
- [flink-issues] 20210111 [jira] [Assigned] (FLINK-20916) Typo in test for CVE-2020-17519mailing-list
- [flink-issues] 20210111 [jira] [Commented] (FLINK-20916) Typo in test for CVE-2020-17519mailing-list
- [flink-dev] 20210113 Re: [DISCUSS] Releasing Apache Flink 1.10.3mailing-list
- [flink-dev] 20210115 Re: [DISCUSS] Releasing Apache Flink 1.10.3mailing-list
- [announce] 20210125 Apache Software Foundation Security Report: 2020mailing-list
- [announce] 20210223 Re: Apache Software Foundation Security Report: 2020mailing-list
- https://lists.apache.org/thread.html/r26fcdd4fe288323006253437ebc4dd6fdfadfb5e93465a0e4f68420d%40%3Cuser-zh.flink.apache.org%3E
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-17519government-resource
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