CVE-2020-17518
Apache Flink directory traversal attack: remote file writing through the REST API
HIGH 7.5EPSS 49.1%
Apache Flink 1.5.1 introduced a REST handler that allows you to write an uploaded file to an arbitrary location on the local file system, through a maliciously modified HTTP HEADER. The files can be written to any location accessible by Flink 1.5.1. 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 a5264a6f41524afe8ceadf1d8ddc8c80f323ebc4 from apache/flink:master.
- Affected
- Apache Software Foundation · Apache Flink
- CVSS v3.1 NVD
- 7.5 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - CVSS v2.0 NVD
- 5.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:P/A:N - EPSS
- 49.10% chance of exploitation in the next 30 days, 99th percentile
- Nuclei
- high
- Published
- 2021-01-05
- Updated
- 2025-02-13
Proof-of-concept exploits (3)
- QmF0c3UK/CVE-2020-175187★ · 2021-01-06
- murataydemir/CVE-2020-175183★ · 2021-01-10
- rakjong/Flink-CVE-2020-17518-getshell1★ · 2021-01-12
Nuclei templates (1)
Vulhub environments (1)
Exploit collections (2)
- CVE-2020-17518 Apache Flink 任意文件写入.mdtzwlhack/Vulnerability
- CVE-2020-17518.yamlzan8in/afrog
Security advisories
- https://lists.apache.org/thread.html/rb43cd476419a48be89c1339b527a18116f23eec5b6df2b2acbf…
- http://www.openwall.com/lists/oss-security/2021/01/05/1
- advisories/GHSA-7q5g-gph2-4rc6