Upload of file to arbitrary path in Apache Flink

ÉLEVÉE 7.5CVE-2020-17518 · BIT-flink-2020-17518 · GHSA-7q5g-gph2-4rc6 · Published 05/01/2021 · updated 17/06/2026

En bref

CVE-2020-17518 est une vulnérabilité ÉLEVÉE (CVSS 7.5) touchant org.apache.flink:flink-runtime, flink (apache).
Probabilité d'exploitation dans les 30 prochains jours (EPSS) : 49.1%, plus élevée que 98.9% des vulnérabilités.
Correctif : mettre à jour vers 1.11.3 ou plus récent.

Package	Affected versions	Patched versions
org.apache.flink:flink-runtime Maven	`≥ 1.5.1, < 1.11.3`	`1.11.3`
flink apache	`≥ 1.5.1, < 1.11.3`	`1.11.3`

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.

NVD description

References

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