Link Following Affecting squashfs-tools package, versions <0:4.3-21.el8


Severity

Recommended
medium

Based on CentOS security rating.

Threat Intelligence

EPSS
3.38% (87th percentile)

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  • Snyk IDSNYK-CENTOS8-SQUASHFSTOOLS-1973700
  • published26 Sept 2021
  • disclosed14 Sept 2021

Introduced: 14 Sep 2021

CVE-2021-41072  (opens in a new tab)
CWE-59  (opens in a new tab)

How to fix?

Upgrade Centos:8 squashfs-tools to version 0:4.3-21.el8 or higher.

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 Centos. See How to fix? for Centos:8 relevant fixed versions and status.

squashfs_opendir in unsquash-2.c in Squashfs-Tools 4.5 allows Directory Traversal, a different vulnerability than CVE-2021-40153. A squashfs filesystem that has been crafted to include a symbolic link and then contents under the same filename in a filesystem can cause unsquashfs to first create the symbolic link pointing outside the expected directory, and then the subsequent write operation will cause the unsquashfs process to write through the symbolic link elsewhere in the filesystem.

CVSS Base Scores

version 3.1