Important: sudo

Issue Overview:

A flaw was found in the way sudo parsed tty information from the process
status file in the proc filesystem. A local user with privileges to execute
commands via sudo could use this flaw to escalate their privileges to root.
(CVE-2017-1000367)

Affected Packages:

sudo

Issue Correction:
Run yum update sudo to update your system.

New Packages:

i686:  
    sudo-devel-1.8.6p3-28.25.amzn1.i686  
    sudo-1.8.6p3-28.25.amzn1.i686  
    sudo-debuginfo-1.8.6p3-28.25.amzn1.i686  
  
src:  
    sudo-1.8.6p3-28.25.amzn1.src  
  
x86_64:  
    sudo-1.8.6p3-28.25.amzn1.x86_64  
    sudo-devel-1.8.6p3-28.25.amzn1.x86_64  
    sudo-debuginfo-1.8.6p3-28.25.amzn1.x86_64  

Additional References

Red Hat: CVE-2017-1000367

Mitre: CVE-2017-1000367