CVE-2018-14665

An incorrect permission check for -modulepath and -logfile options when starting Xorg X server allows unprivileged users with the ability to log in to the system via physical console to escalate their privileges and run arbitrary code under root privileges.

This issue did not affect the versions of xorg-x11-server as shipped with Red Hat Enterprise Linux 5 and 6, as well as Red Hat Enterprise Linux 7 prior to 7.4, as they did not allow the use of vulnerable command line options when running with elevated privileges.

The default X server configuration in Red Hat Enterprise Linux only allows users logged in on the system's physical console to run Xorg X server. Therefore, users which only have remote access to the the system (for example using SSH) can not exploit this flaw.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.