<?xml version="1.0" encoding="utf-8"?> <!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd"> <glsa id="200611-01"> <title>Screen: UTF-8 character handling vulnerability</title> <synopsis> 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. </synopsis> <product type="ebuild">screen</product> <announced>2006-11-03</announced> <revised count="01">2006-11-03</revised> <bug>152770</bug> <access>remote</access> <affected> <package name="app-misc/screen" auto="yes" arch="*"> <unaffected range="ge">4.0.3</unaffected> <vulnerable range="lt">4.0.3</vulnerable> </package> </affected> <background> <p> Screen is a full-screen window manager that multiplexes a physical terminal between several processes, typically interactive shells. </p> </background> <description> <p> cstone and Richard Felker discovered a flaw in Screen's UTF-8 combining character handling. </p> </description> <impact type="high"> <p> 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. </p> </impact> <workaround> <p> There is no known workaround at this time. </p> </workaround> <resolution> <p> All Screen users should upgrade to the latest version: </p> <code> # emerge --sync # emerge --ask --oneshot --verbose ">=app-misc/screen-4.0.3"</code> </resolution> <references> <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4573">CVE-2006-4573</uri> </references> <metadata tag="submitter" timestamp="2006-10-27T12:01:54Z"> aetius </metadata> <metadata tag="bugReady" timestamp="2006-10-30T11:11:00Z"> falco </metadata> </glsa>