Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Flink | >= 1.5.1, < 1.11.3 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2021/01/05/1Mailing ListThird Party Advisory
- https://lists.apache.org/thread.html/r0b000dc028616d33cb9aa388eb45d516b789cab002
- https://lists.apache.org/thread.html/r1125f3044a0946d1e7e6f125a6170b58d413ebd4a9
- https://lists.apache.org/thread.html/r229167538863518738e02f4c1c5a8bb34c1d45dadc
- https://lists.apache.org/thread.html/r26fcdd4fe288323006253437ebc4dd6fdfadfb5e93
- https://lists.apache.org/thread.html/r28f17e564950d663e68cc6fe75756012dda62ac623
- https://lists.apache.org/thread.html/r4a87837518804b31eb9db3048347ed2bb7b46fbaad
- https://lists.apache.org/thread.html/r5444acac3407ef6397d6aef1b5aec2db53b4b88ef2
- https://lists.apache.org/thread.html/r705fb2211b82c9f1f8d2b1d4c823bcbca50402ba09
- https://lists.apache.org/thread.html/r710693b0d3b229c81f485804ea1145b4edda79c9e7
- https://lists.apache.org/thread.html/r7b2ee88c66fc1d0823e66475631f5c3e7f0365204f
- https://lists.apache.org/thread.html/r8167f30c4c60a11b8d5be3f55537beeda629be6119
- https://lists.apache.org/thread.html/r88200d2f0b620c6b4b1585a7171355005c89e678b0
- https://lists.apache.org/thread.html/r90890afea72a9571d666820b2fe5942a0a5f86be40
- https://lists.apache.org/thread.html/ra8c96bf3ccb4e491f9ce87ba35f134b4449beb2a38
FAQ
What is CVE-2020-17518?
CVE-2020-17518 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 w...
How severe is CVE-2020-17518?
CVE-2020-17518 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-17518?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Flink.