<?xml version="1.0" encoding="utf-8"?> <!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd"> <glsa id="200704-18"> <title>Courier-IMAP: Remote execution of arbitrary code</title> <synopsis> A vulnerability has been discovered in Courier-IMAP allowing for remote code execution with root privileges. </synopsis> <product type="ebuild">courier-imap</product> <announced>2007-04-22</announced> <revised count="02">2007-04-23</revised> <bug>168196</bug> <access>remote</access> <affected> <package name="net-mail/courier-imap" auto="yes" arch="*"> <unaffected range="ge">4.0.6-r2</unaffected> <unaffected range="lt">4.0.0</unaffected> <vulnerable range="lt">4.0.6-r2</vulnerable> </package> </affected> <background> <p> Courier-IMAP is an IMAP server which is part of the Courier mail system. It provides access only to maildirs. </p> </background> <description> <p> CJ Kucera has discovered that some Courier-IMAP scripts don't properly handle the XMAILDIR variable, allowing for shell command injection. </p> </description> <impact type="high"> <p> A remote attacker could send specially crafted login credentials to a Courier-IMAP server instance, possibly leading to remote code execution with root privileges. </p> </impact> <workaround> <p> There is no known workaround at this time. </p> </workaround> <resolution> <p> All Courier-IMAP users should upgrade to the latest version: </p> <code> # emerge --sync # emerge --ask --oneshot --verbose ">=net-mail/courier-imap-4.0.6-r2"</code> </resolution> <references/> <metadata tag="requester" timestamp="2007-04-12T14:15:03Z"> jaervosz </metadata> <metadata tag="bugReady" timestamp="2007-04-12T14:15:17Z"> jaervosz </metadata> <metadata tag="submitter" timestamp="2007-04-16T21:50:11Z"> p-y </metadata> </glsa>