Debian Stretch: DLA-2752-1 Critical: squashfs-tools File Validation Issue

An issue has been found in squashfs-tools, a tool to create and append to
squashfs filesystems.
As unsquashfs did not validate all filepaths, it would allow writing
outside of the original destination.


For Debian 9 stretch, this problem has been fixed in version
1:4.3-3+deb9u2.

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/source-package/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