1. Ubuntu Security Notices
  2. USN-5286-1

USN-5286-1: cryptsetup vulnerability

Publication date

15 February 2022

Overview

cryptsetup could be made to expose sensitive information.

Releases

Packages

Details

Milan Broz discovered that cryptsetup incorrectly handled LUKS2
reencryption recovery. An attacker with physical access to modify the
encrypted device header may trigger the device to be unencrypted the next
time it is mounted by the user.

On Ubuntu 20.04 LTS, this issue was fixed by disabling the online
reencryption feature.

Milan Broz discovered that cryptsetup incorrectly handled LUKS2
reencryption recovery. An attacker with physical access to modify the
encrypted device header may trigger the device to be unencrypted the next
time it is mounted by the user.

On Ubuntu 20.04 LTS, this issue was fixed by disabling the online
reencryption feature.

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
21.10 impish cryptsetup –  2:2.3.7-0ubuntu0.21.10.1
20.04 focal cryptsetup –  2:2.2.2-3ubuntu2.4

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References

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