<?xml version="1.0" encoding="utf-8"?> <!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd"> <glsa id="200701-06"> <title>w3m: Format string vulnerability</title> <synopsis> w3m does not correctly handle format string specifiers in SSL certificates. </synopsis> <product type="ebuild">w3m</product> <announced>2007-01-12</announced> <revised count="01">2007-01-12</revised> <bug>159145</bug> <access>remote</access> <affected> <package name="www-client/w3m" auto="yes" arch="*"> <unaffected range="ge">0.5.1-r4</unaffected> <vulnerable range="lt">0.5.1-r4</vulnerable> </package> </affected> <background> <p> w3m is a multi-platform text-based web browser. </p> </background> <description> <p> w3m in -dump or -backend mode does not correctly handle printf() format string specifiers in the Common Name (CN) field of an X.509 SSL certificate. </p> </description> <impact type="normal"> <p> An attacker could entice a user to visit a malicious website that would load a specially crafted X.509 SSL certificate containing "%n" or other format string specifiers, possibly resulting in the execution of arbitrary code with the rights of the user running w3m. </p> </impact> <workaround> <p> There is no known workaround at this time. </p> </workaround> <resolution> <p> All w3m users should upgrade to the latest version: </p> <code> # emerge --sync # emerge --ask --oneshot --verbose ">=www-client/w3m-0.5.1-r4"</code> </resolution> <references> <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6772">CVE-2006-6772</uri> </references> <metadata tag="submitter" timestamp="2007-01-11T00:57:23Z"> aetius </metadata> <metadata tag="bugReady" timestamp="2007-01-11T11:00:25Z"> DerCorny </metadata> </glsa>