Directory Traversal Affecting squashfs-tools package, versions *


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.46% (76th percentile)

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  • Snyk IDSNYK-RHEL7-SQUASHFSTOOLS-1582243
  • published3 Sept 2021
  • disclosed10 Sept 2019

Introduced: 10 Sep 2019

CVE-2021-40153  (opens in a new tab)
CWE-22  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:7 squashfs-tools.

NVD Description

Note: Versions mentioned in the description apply only to the upstream squashfs-tools package and not the squashfs-tools package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

squashfs_opendir in unsquash-1.c in Squashfs-Tools 4.5 stores the filename in the directory entry; this is then used by unsquashfs to create the new file during the unsquash. The filename is not validated for traversal outside of the destination directory, and thus allows writing to locations outside of the destination.

CVSS Scores

version 3.1