CVE-2021-41072

high

Description

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.

References

https://www.debian.org/security/2021/dsa-4987

https://security.gentoo.org/glsa/202305-29

https://lists.debian.org/debian-lts-announce/2021/10/msg00017.html

https://github.com/plougher/squashfs-tools/issues/72#issuecomment-913833405

https://github.com/plougher/squashfs-tools/commit/e0485802ec72996c20026da320650d8362f555bd

Details

Source: Mitre, NVD

Published: 2021-09-14

Updated: 2023-05-30

Risk Information

CVSS v2

Base Score: 5.8

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 8.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

Severity: High