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Published on November 11th, 2021 📆 | 5075 Views ⚑

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Ubuntu Security Notice USN-5141-1 – Torchsec

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Ubuntu Security Notice USN-5141-1
November 11, 2021

firejail vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

– Ubuntu 20.04 LTS

Summary:

Firejail could be made to overwrite files as the administrator.

Software Description:
– firejail: Application sandbox

Details:

Roman Fiedler discovered that a race condition existed in Firejail
when using OverlayFS to prevent writes to the underlying file system. A
local attacker could use this to gain administrative privileges. Note:
this update disables support for OverlayFS in Firejail.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS:
firejail 0.9.62-3ubuntu0.1

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-5141-1
CVE-2021-26910

Package Information:
https://launchpad.net/ubuntu/+source/firejail/0.9.62-3ubuntu0.1

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