CVE-2020-17518
high-risk
Published 2021-01-05
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.
Do I need to act?
!
93.8% chance of exploitation in next 30 days
EPSS score — higher than 6% of all CVEs
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10
High
NETWORK
/ LOW complexity
Affected Products (1)
Affected Vendors
References (50)
and 30 more references
51
/ 100
high-risk
Severity
26/34 · High
Exploitability
20/34 · Moderate
Exposure
5/34 · Minimal