USN-3304-1: Sudo vulnerability

Releases

• Ubuntu 17.04
• Ubuntu 16.10
• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM

Packages

• sudo - Provide limited super user privileges to specific users

Details

It was discovered that Sudo did not properly parse the contents of
/proc/[pid]/stat when attempting to determine its controlling tty.
A local attacker in some configurations could possibly use this to
overwrite any file on the filesystem, bypassing intended permissions.

Update instructions

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

Ubuntu 17.04

• sudo - 1.8.19p1-1ubuntu1.1
• sudo-ldap - 1.8.19p1-1ubuntu1.1

Ubuntu 16.10

• sudo - 1.8.16-0ubuntu3.2
• sudo-ldap - 1.8.16-0ubuntu3.2

Ubuntu 16.04

• sudo - 1.8.16-0ubuntu1.4
• sudo-ldap - 1.8.16-0ubuntu1.4

Ubuntu 14.04

• sudo - 1.8.9p5-1ubuntu1.4
• sudo-ldap - 1.8.9p5-1ubuntu1.4

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

References

• CVE-2017-1000367