🛡️ MGASA-2022-0010 — squashfs-tools

Updated squashfs-tools packages fix security vulnerability

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. (CVE-2021-40153)

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.

(CVE-2021-41072)