"An updated sudo package that fixes two security issues is now available for
Red Hat Enterprise Linux 5.
This update has been rated as having important security impact by the Red
Hat Security Response Team.
The sudo (superuser do) utility allows system administrators to give
certain users the ability to run commands as root.
A privilege escalation flaw was found in the way sudo handled the sudoedit
pseudo-command. If a local user were authorized by the sudoers file to use
this pseudo-command, they could possibly leverage this flaw to execute
arbitrary code with the privileges of the root user. (CVE-2010-0426)
The sudo utility did not properly initialize supplementary groups when the
"runas_default" option (in the sudoers file) was used. If a local user
were authorized by the sudoers file to perform their sudo commands under
the account specified with "runas_default", they would receive the root
user's supplementary groups instead of those of the intended target user,
giving them unintended privileges. (CVE-2010-0427)
Users of sudo should upgrade to this updated package, which contains
backported patches to correct these issues."
It is recommended that RHEL systems be updated for this sudo issue.