Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2021.2935
squashfs-tools security update
1 September 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: squashfs-tools
Publisher: Debian
Operating System: Debian GNU/Linux
Impact/Access: Overwrite Arbitrary Files -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-40153
Reference: ESB-2021.2932
Original Bulletin:
https://lists.debian.org/debian-lts-announce/2021/08/msg00030.html
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Debian LTS Advisory DLA-2752-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/ Thorsten Alteholz
August 31, 2021 https://wiki.debian.org/LTS
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Package : squashfs-tools
Version : 1:4.3-3+deb9u2
CVE ID : CVE-2021-40153
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/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
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