Joined: 12 May 2004
|Posted: Fri Nov 03, 2006 2:26 pm Post subject: [ GLSA 200611-01 ] Screen: UTF-8 character handling vulnerab
|Gentoo Linux Security Advisory
Title: Screen: UTF-8 character handling vulnerability (GLSA 200611-01)
Date: November 03, 2006
Screen contains an error in its UTF-8 character handling code that would allow a remote Denial of Service or possibly the remote execution of arbitrary code.
Screen is a full-screen window manager that multiplexes a physical terminal between several processes, typically interactive shells.
Vulnerable: < 4.0.3
Unaffected: >= 4.0.3
Architectures: All supported architectures
cstone and Richard Felker discovered a flaw in Screen's UTF-8 combining character handling.
The vulnerability can be exploited by writing a special string of characters to a Screen window. A remote attacker could cause a Denial of Service or possibly execute arbitrary code with the privileges of the user running Screen through a program being run inside a Screen session, such as an IRC client or a mail client.
There is no known workaround at this time.
All Screen users should upgrade to the latest version:
|# emerge --sync
# emerge --ask --oneshot --verbose ">=app-misc/screen-4.0.3"