Link Following Affecting squashfs-tools package, versions *



    Attack Complexity Low
    User Interaction Required
    Integrity High
    Availability High
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8.1 high
Expand this section
Red Hat
8.1 high

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  • published 26 Sep 2021
  • disclosed 14 Sep 2021

How to fix?

There is no fixed version for Centos:8 squashfs-tools.

NVD Description

Note: Versions mentioned in the description apply only to the upstream squashfs-tools package and not the squashfs-tools package as distributed by Centos:8. See How to fix? for Centos:8 relevant fixed versions and status.

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.