CVE-2020-17518CWE-23

Apache Flink directory traversal attack: remote file writing through the REST API

published January 5, 2021

CVSS

—

EPSS

49%

Percentile

98.9

In the wild

Unconfirmed

What it is

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.

The record

Technical detail

CVSS: Not scored
CVSS v4.0: Not supplied
EPSS: 0.49104 · 98.9th percentile
Weakness: CWE-23 · Relative Path Traversal
Published: 2021-01-05T11:40Z

EPSS history

Timeline

05 JAN 11:40Z
Apache Flink directory traversal attack: remote file writing through the REST API
cvelistv5