CVE-2020-17518
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Apache Flink
PublishedJan 5, 2021
First seenJan 5, 2021
Weakness typeCWE-23CWE-23
How to fix
Update
- apache flink1.11.3 or later
- org.apache.flink:flink-runtime1.11.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| apache flink | 1.5.1 ≤ v < 1.11.3 | 1.11.3 |
| org.apache.flink:flink-runtimeMaven | 1.5.1 ≤ v < 1.11.3 | 1.11.3 |
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