Ubuntu Security Notice 5078-2 - USN-5078-1 fixed several vulnerabilities in Squashfs-Tools. This update provides the corresponding update for Ubuntu 16.04 ESM. Etienne Stalmans discovered that Squashfs-Tools mishandled certain malformed SQUASHFS files. An attacker could use this vulnerability to write arbitrary files to the filesystem. Various other issues were also addressed.
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Ubuntu Security Notice USN-5078-2
September 15, 2021
squashfs-tools vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.04 ESM
Summary:
Squashfs-Tools could be made to overwrite files.
Software Description:
- 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 ESM:
squashfs-tools 1:4.3-3ubuntu2.16.04.3+esm1
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-5078-2
https://ubuntu.com/security/notices/USN-5078-1
CVE-2021-40153, CVE-2021-41072