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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200408-02">
<title>Courier: Cross-site scripting vulnerability in SqWebMail</title>
<synopsis>
The SqWebMail web application, included in the Courier suite, is vulnerable
to cross-site scripting attacks.
</synopsis>
<product type="ebuild">Courier</product>
<announced>August 04, 2004</announced>
<revised>August 04, 2004: 01</revised>
<bug>58020</bug>
<access>remote</access>
<affected>
<package name="mail-mta/courier" auto="yes" arch="*">
<unaffected range="ge">0.45.6.20040618</unaffected>
<vulnerable range="le">0.45.6</vulnerable>
</package>
</affected>
<background>
<p>
Courier is an integrated mail and groupware server based on open protocols.
It provides ESMTP, IMAP, POP3, webmail, and mailing list services within a
single framework. The webmail functionality included in Courier called
SqWebMail allows you to access mailboxes from a web browser.
</p>
</background>
<description>
<p>
Luca Legato found that SqWebMail is vulnerable to a cross-site scripting
(XSS) attack. An XSS attack allows an attacker to insert malicious code
into a web-based application. SqWebMail doesn't filter appropriately data
coming from message headers before displaying them.
</p>
</description>
<impact type="normal">
<p>
By sending a carefully crafted message, an attacker can inject and execute
script code in the victim's browser window. This allows to modify the
behaviour of the SqWebMail application, and/or leak session information
such as cookies to the attacker.
</p>
</impact>
<workaround>
<p>
There is no known workaround at this time. All users are encouraged to
upgrade to the latest available version of Courier.
</p>
</workaround>
<resolution>
<p>
All Courier users should upgrade to the latest version:
</p>
<code>
# emerge sync
# emerge -pv ">=mail-mta/courier-0.45.6.20040618"
# emerge ">=mail-mta/courier-0.45.6.20040618"</code>
</resolution>
<references>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0591">CAN-2004-0591</uri>
<uri link="http://www.cert.org/advisories/CA-2000-02.html">XSS definition</uri>
</references>
<metadata tag="requester">
koon
</metadata>
<metadata tag="submitter" timestamp="Tue, 3 Aug 2004 15:23:08 +0000">
koon
</metadata>
</glsa>