Family: Red Hat Local Security Checks --> Category: infos
RHSA-2003-028: pam Vulnerability Scan
Vulnerability Scan Summary
Check for the version of the pam packages
Detailed Explanation for this Vulnerability Test
Updated PAM packages are now available. These packages correct a bug in
pam_xauth's handling of authorization data for the root user.
[Updated 12 March 2003]
Added packages for Red Hat Enterprise Linux ES and Red Hat Enterprise
The pam_xauth module is used to forward xauth information from user to user
in applications such as the su command.
Andreas Beck discovered that pam_xauth will forward authorization
information from the root account to unprivileged users. This could be
used by a local attacker to gain access to an administrator's X session.
To exploit this vulnerability the attacker would have to get the
administrator, as root, to use su to access the account belonging to the
Users of pam_xauth are advised to upgrade to these errata packages which
contain a patch which adds ACL (access control list) functionality to
pam_xauth and disallows root forwarding by default.
Thanks to Andreas Beck for reporting this issue.
Solution : http://rhn.redhat.com/errata/RHSA-2003-028.html
Threat Level: High
Click HERE for more information and discussions on this network vulnerability scan.