X.Org X server: Composite local privilege escalation

X.Org X server: Composite local privilege escalation A vulnerability has been discovered in the Composite extension of the X.Org X server, allowing for a local privilege escalation. X.Org October 14, 2007 October 14, 2007: 01 191964 local 1.3.0.0-r1 1.3.0.0-r1

The X Window System is a graphical windowing system based on a client/server model.

Aaron Plattner discovered a buffer overflow in the compNewPixmap() function when copying data from a large pixel depth pixmap into a smaller pixel depth pixmap.

A local attacker could execute arbitrary code with the privileges of the user running the X server, typically root.

Disable the Composite extension by setting ' Option "Composite" "disable" ' in the Extensions section of xorg.conf.

Note: This could affect the functionality of some applications.

All X.Org X server users should upgrade to the latest version:


    # emerge --sync
    # emerge --ask --oneshot --verbose ">=x11-base/xorg-server-1.3.0.0-r1"

CVE-2007-4730 p-y p-y rbu