xterm: User-assisted arbitrary commands execution

Background

xterm is a terminal emulator for the X Window system.

Description

Paul Szabo reported an insufficient input sanitization when processing Device Control Request Status String (DECRQSS) sequences.

Impact

A remote attacker could entice a user to display a file containing specially crafted DECRQSS sequences, possibly resulting in the remote execution of arbitrary commands with the privileges of the user viewing the file.

Workaround

There is no known workaround at this time.

Resolution

All xterm users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=x11-terms/xterm-239"