USN-5811-1: Sudo vulnerabilities

Releases

• Ubuntu 22.10
• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM

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)

Update instructions

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

Ubuntu 22.10

• sudo-ldap - 1.9.11p3-1ubuntu1.1
• sudo - 1.9.11p3-1ubuntu1.1

Ubuntu 22.04

• sudo-ldap - 1.9.9-1ubuntu2.2
• sudo - 1.9.9-1ubuntu2.2

Ubuntu 20.04

• sudo-ldap - 1.8.31-1ubuntu1.4
• sudo - 1.8.31-1ubuntu1.4

Ubuntu 18.04

• sudo-ldap - 1.8.21p2-3ubuntu1.5
• sudo - 1.8.21p2-3ubuntu1.5

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

References

• CVE-2023-22809
• CVE-2022-33070

Related notices

• USN-5811-2: sudo, sudo-ldap
• USN-5811-3: sudo, sudo-ldap
• USN-5531-1: protobuf-c-compiler, libprotobuf-c1, protobuf-c, libprotobuf-c-dev