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Debian LTS Advisory DLA-2789-1                [email protected]
https://www.debian.org/lts/security/                    Thorsten Alteholz
October 20, 2021                              https://wiki.debian.org/LTS
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Package        : squashfs-tools
Version        : 1:4.3-3+deb9u3
CVE ID         : CVE-2021-41072


Richard Weinberger reported that unsquashfs in squashfs-tools, the tools 
to create and extract Squashfs filesystems, does not check for duplicate 
filenames within a directory. An attacker can take advantage of this flaw 
for writing to arbitrary files to the filesystem if a malformed Squashfs 
image is processed.


For Debian 9 stretch, this problem has been fixed in version 
1:4.3-3+deb9u3.

We recommend that you upgrade your squashfs-tools packages.

For the detailed security status of squashfs-tools please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/squashfs-tools

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS