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<?xml version="1.0" encoding="utf-8"?>
<glsa id="200611-01">
<title>Screen: UTF-8 character handling vulnerability</title>
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.
<product type="ebuild">screen</product>
<announced>November 03, 2006</announced>
<revised>November 03, 2006: 01</revised>
<package name="app-misc/screen" auto="yes" arch="*">
<unaffected range="ge">4.0.3</unaffected>
<vulnerable range="lt">4.0.3</vulnerable>
Screen is a full-screen window manager that multiplexes a physical
terminal between several processes, typically interactive shells.
cstone and Richard Felker discovered a flaw in Screen's UTF-8 combining
character handling.
<impact type="high">
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 &quot;&gt;=app-misc/screen-4.0.3&quot;</code>
<uri link="">CVE-2006-4573</uri>
<metadata tag="submitter" timestamp="Fri, 27 Oct 2006 12:01:54 +0000">
<metadata tag="bugReady" timestamp="Mon, 30 Oct 2006 11:11:00 +0000">