CVE-2021-40153
squashfs-tools: unvalidated filepaths allow writing outside of destination
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 10, 2019
Updated · November 21, 2025
Description
A flaw was found in Squashfs-tools, where it is vulnerable to attacks similar to zip-slip. During extraction, a file can escape the destination directory either via the '../' string to access the parent directory or via symlinks. This flaw allows a specially crafted squashfs archive to install or overwrite files outside of the destination directory.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 8.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')