X.Org X11 library: Denial of service

Background

X.Org is an implementation of the X Window System. The X.Org X11 library provides the X11 protocol library files.

Description

It was discovered that XLookupColor() and other X.Org X11 library functions lacked proper validation of the length of their string parameters.

Impact

An attacker could emit arbitrary X protocol requests to the X server through malicious crafted string parameters in applications linked against X.Org X11 library.

Workaround

There is no known workaround at this time.

Resolution

All X.Org X11 library users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=x11-libs/libX11-1.7.1"