sudo: Heap-Based Buffer Overread

Background

sudo allows a system administrator to give users the ability to run commands as other users.

Description

In certain password input handling, sudo incorrectly assumes the password input is at least nine bytes in size, leading to a heap buffer overread.

Impact

In the worst case, the heap buffer overread can result in the denial of service of the sudo process.

Workaround

There is no known workaround at this time.

Resolution

All sudo users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=app-admin/sudo-1.9.12-r1"