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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200805-20">
<title>GnuTLS: Execution of arbitrary code</title>
<synopsis>
Multiple vulnerabilities might allow for the execution of arbitrary code in
daemons using GnuTLS.
</synopsis>
<product type="ebuild">gnutls</product>
<announced>May 21, 2008</announced>
<revised>May 21, 2008: 01</revised>
<bug>222823</bug>
<access>remote</access>
<affected>
<package name="net-libs/gnutls" auto="yes" arch="*">
<unaffected range="ge">2.2.5</unaffected>
<vulnerable range="lt">2.2.5</vulnerable>
</package>
</affected>
<background>
<p>
GnuTLS is an implementation of Secure Sockets Layer (SSL) 3.0 and
Transport Layer Security (TLS) 1.0, 1.1 and 1.2.
</p>
</background>
<description>
<p>
Ossi Herrala and Jukka Taimisto of Codenomicon reported three
vulnerabilities in libgnutls of GnuTLS:
</p>
<ul>
<li>
"Client Hello" messages containing an invalid server name can lead to a
buffer overflow when evaluating "Security Parameters" (CVE-2008-1948).
</li>
<li>
Multiple "Client Hello" messages can lead to a NULL pointer dereference
(CVE-2008-1949).
</li>
<li>
A TLS handshake including an encrypted "Client Hello" message and an
invalid record length could lead to a buffer overread (CVE-2008-1950).
</li>
</ul>
</description>
<impact type="high">
<p>
Unauthenticated remote attackers could exploit these vulnerabilities to
cause Denial of Service conditions in daemons using GnuTLS. The first
vulnerability (CVE-2008-1948) might allow for the execution of
arbitrary code with the privileges of the daemon handling incoming TLS
connections.
</p>
</impact>
<workaround>
<p>
There is no known workaround at this time.
</p>
</workaround>
<resolution>
<p>
All GnuTLS users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=net-libs/gnutls-2.2.5&quot;</code>
</resolution>
<references>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1948">CVE-2008-1948</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1949">CVE-2008-1949</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1950">CVE-2008-1950</uri>
</references>
<metadata tag="submitter" timestamp="Tue, 20 May 2008 16:44:10 +0000">
rbu
</metadata>
<metadata tag="bugReady" timestamp="Wed, 21 May 2008 16:32:55 +0000">
rbu
</metadata>
</glsa>