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AUSCERT External Security Bulletin Redistribution
ESB-2021.3120
USN-5078-2: Squashfs-Tools vulnerabilities
16 September 2021
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AusCERT Security Bulletin Summary
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Product: Squashfs-Tools
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Overwrite Arbitrary Files -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2021-41072 CVE-2021-40153
Reference: ESB-2021.3111
ESB-2021.2994
Original Bulletin:
https://ubuntu.com/security/notices/USN-5078-2
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USN-5078-2: Squashfs-Tools vulnerabilities
15 September 2021
Squashfs-Tools could be made to overwrite files.
Releases
o Ubuntu 16.04 ESM
Packages
o squashfs-tools - Tools to create and modify squashfs filesystems
Details
USN-5078-1 fixed several vulnerabilities in Squashfs-Tools.
This update provides the corresponding update for Ubuntu 16.04 ESM.
Original advisory details:
Etienne Stalmans discovered that Squashfs-Tools mishandled certain
malformed SQUASHFS files. An attacker could use this vulnerability
to write arbitrary files to the filesystem. ( CVE-2021-40153 )
Richard Weinberger discovered that Squashfs-Tools mishandled certain
malformed SQUASHFS files. An attacker could use this vulnerability to
write arbitrary files to the filesystem. ( CVE-2021-41072 )
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 16.04
o squashfs-tools - 1:4.3-3ubuntu2.16.04.3+esm1
Available with UA Infra or UA Desktop
In general, a standard system update will make all the necessary changes.
References
o CVE-2021-40153
o CVE-2021-41072
Related notices
o USN-5078-1 : squashfs-tools
o USN-5057-1 : squashfs-tools
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