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USN-4705-2: Sudo vulnerability

27 January 2021

Several security issues were fixed in Sudo.



  • sudo - Provide limited super user privileges to specific users


USN-4705-1 fixed a vulnerability in Sudo. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

It was discovered that Sudo incorrectly handled memory when parsing command
lines. A local attacker could possibly use this issue to obtain unintended
access to the administrator account. (CVE-2021-3156)

Update instructions

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

Ubuntu 14.04
Ubuntu 12.04

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


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