1. Ubuntu Security Notices
  2. USN-5811-1

USN-5811-1: Sudo vulnerabilities

Publication date

18 January 2023

Overview

Several security issues were fixed in Sudo.

Releases

Packages

  • sudo - Provide limited super user privileges to specific users

Details

Matthieu Barjole and Victor Cutillas discovered that Sudo incorrectly
handled user-specified editors when using the sudoedit command. A local
attacker that has permission to use the sudoedit command could possibly use
this issue to edit arbitrary files. (CVE-2023-22809)

It was discovered that the Protobuf-c library, used by Sudo, incorrectly
handled certain arithmetic shifts. An attacker could possibly use this
issue to cause Sudo to crash, resulting in a denial of service. This issue
only affected Ubuntu 22.04 LTS. (CVE-2022-33070)

Matthieu Barjole and Victor Cutillas discovered that Sudo incorrectly
handled user-specified editors when using the sudoedit command. A local
attacker that has permission to use the sudoedit command could possibly use
this issue to edit arbitrary files. (CVE-2023-22809)

It was discovered that the Protobuf-c library, used by Sudo, incorrectly
handled certain arithmetic shifts. An attacker could possibly use this
issue to cause Sudo to crash, resulting in a denial of service. This issue
only affected Ubuntu 22.04 LTS. (CVE-2022-33070)

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
22.10 kinetic sudo-ldap –  1.9.11p3-1ubuntu1.1
sudo –  1.9.11p3-1ubuntu1.1
22.04 jammy sudo-ldap –  1.9.9-1ubuntu2.2
sudo –  1.9.9-1ubuntu2.2
20.04 focal sudo-ldap –  1.8.31-1ubuntu1.4
sudo –  1.8.31-1ubuntu1.4
18.04 bionic sudo-ldap –  1.8.21p2-3ubuntu1.5
sudo –  1.8.21p2-3ubuntu1.5

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Get Ubuntu Pro

References

Have additional questions?

Talk to a member of the team ›