8.1

CVE-2021-40153

Exploit
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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Fedoraproject ≫ Fedora Version 34
Debian ≫ Debian Linux Version 9.0
Debian ≫ Debian Linux Version 10.0
Redhat ≫ Enterprise Linux Version 7.0
Redhat ≫ Enterprise Linux Version 8.0
Fedoraproject ≫ Fedora Version 33
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 2.5% 0.826
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 8.1 2.8 5.2
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
NIST 5.8 8.6 4.9
AV:N/AC:M/Au:N/C:N/I:P/A:P
CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

https://bugs.launchpad.net/ubuntu/+source/squashfs-tools/+bug/1941790
Third Party Advisory
https://github.com/plougher/squashfs-tools/commit/79b5a555058eef4e1e7ff220c344d39f8cd09646
Patch
Third Party Advisory
https://github.com/plougher/squashfs-tools/issues/72
Third Party Advisory
Exploit
https://lists.debian.org/debian-lts-announce/2021/08/msg00030.html
Third Party Advisory
Mailing List
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GSMRKVJMJFX3MB7D3PXJSYY3TLZROE5S/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RAOZ4BKWAC4Y3U2K5MMW3S77HWWXHQDL/
https://security.gentoo.org/glsa/202305-29
https://www.debian.org/security/2021/dsa-4967
Third Party Advisory