Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Squashfs-Tools Project | Squashfs-Tools | 4.5 |
| Debian | Debian Linux | 9.0 |
Related Weaknesses (CWE)
References
- https://github.com/plougher/squashfs-tools/commit/e0485802ec72996c20026da320650dPatchThird Party Advisory
- https://github.com/plougher/squashfs-tools/issues/72#issuecomment-913833405ExploitThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/10/msg00017.htmlMailing ListThird Party Advisory
- https://security.gentoo.org/glsa/202305-29
- https://www.debian.org/security/2021/dsa-4987Third Party Advisory
- https://github.com/plougher/squashfs-tools/commit/e0485802ec72996c20026da320650dPatchThird Party Advisory
- https://github.com/plougher/squashfs-tools/issues/72#issuecomment-913833405ExploitThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/10/msg00017.htmlMailing ListThird Party Advisory
- https://security.gentoo.org/glsa/202305-29
- https://www.debian.org/security/2021/dsa-4987Third Party Advisory
FAQ
What is CVE-2021-41072?
CVE-2021-41072 is a vulnerability with a CVSS score of 8.1 (HIGH). 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...
How severe is CVE-2021-41072?
CVE-2021-41072 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-41072?
Check the references section above for vendor advisories and patch information. Affected products include: Squashfs-Tools Project Squashfs-Tools, Debian Debian Linux.