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<?xml version="1.0" encoding="utf-8"?>
<?xml-stylesheet href="/xsl/glsa.xsl" type="text/xsl"?>
<?xml-stylesheet href="/xsl/guide.xsl" type="text/xsl"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200709-14">
<title>ClamAV: Multiple vulnerabilities</title>
<synopsis>
Vulnerabilities have been discovered in ClamAV allowing remote execution of
arbitrary code and Denial of Service attacks.
</synopsis>
<product type="ebuild">clamav</product>
<announced>September 20, 2007</announced>
<revised>September 20, 2007: 01</revised>
<bug>189912</bug>
<access>remote</access>
<affected>
<package name="app-antivirus/clamav" auto="yes" arch="*">
<unaffected range="ge">0.91.2</unaffected>
<vulnerable range="lt">0.91.2</vulnerable>
</package>
</affected>
<background>
<p>
Clam AntiVirus is an open source (GPL) anti-virus toolkit for UNIX,
designed especially for e-mail scanning on mail gateways.
</p>
</background>
<description>
<p>
Nikolaos Rangos discovered a vulnerability in ClamAV which exists
because the recipient address extracted from email messages is not
properly sanitized before being used in a call to "popen()" when
executing sendmail (CVE-2007-4560). Also, NULL-pointer dereference
errors exist within the "cli_scanrtf()" function in libclamav/rtf.c and
Stefanos Stamatis discovered a NULL-pointer dereference vulnerability
within the "cli_html_normalise()" function in libclamav/htmlnorm.c
(CVE-2007-4510).
</p>
</description>
<impact type="high">
<p>
The unsanitized recipient address can be exploited to execute arbitrary
code with the privileges of the clamav-milter process by sending an
email with a specially crafted recipient address to the affected
system. Also, the NULL-pointer dereference errors can be exploited to
crash ClamAV. Successful exploitation of the latter vulnerability
requires that clamav-milter is started with the "black hole" mode
activated, which is not enabled by default.
</p>
</impact>
<workaround>
<p>
There is no known workaround at this time.
</p>
</workaround>
<resolution>
<p>
All ClamAV users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=app-antivirus/clamav-0.91.2&quot;</code>
</resolution>
<references>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4510">CVE-2007-4510</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4560">CVE-2007-4560</uri>
</references>
<metadata tag="submitter" timestamp="Fri, 14 Sep 2007 22:57:24 +0000">
mfleming
</metadata>
<metadata tag="bugReady" timestamp="Sat, 15 Sep 2007 12:07:22 +0000">
p-y
</metadata>
</glsa>