| <?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>November 03, 2006</announced> |
| <revised>November 03, 2006: 01</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="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4573">CVE-2006-4573</uri> |
| </references> |
| <metadata tag="submitter" timestamp="Fri, 27 Oct 2006 12:01:54 +0000"> |
| aetius |
| </metadata> |
| <metadata tag="bugReady" timestamp="Mon, 30 Oct 2006 11:11:00 +0000"> |
| falco |
| </metadata> |
| </glsa> |