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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200905-01">
<title>Asterisk: Multiple vulnerabilities</title>
<synopsis>
Multiple vulnerabilities have been found in Asterisk allowing for Denial of
Service and username disclosure.
</synopsis>
<product type="ebuild">asterisk</product>
<announced>May 02, 2009</announced>
<revised>May 02, 2009: 01</revised>
<bug>218966</bug>
<bug>224835</bug>
<bug>232696</bug>
<bug>232698</bug>
<bug>237476</bug>
<bug>250748</bug>
<bug>254304</bug>
<access>remote</access>
<affected>
<package name="net-misc/asterisk" auto="yes" arch="*">
<unaffected range="ge">1.2.32</unaffected>
<vulnerable range="lt">1.2.32</vulnerable>
</package>
</affected>
<background>
<p>
Asterisk is an open source telephony engine and toolkit.
</p>
</background>
<description>
<p>
Multiple vulnerabilities have been discovered in the IAX2 channel
driver when performing the 3-way handshake (CVE-2008-1897), when
handling a large number of POKE requests (CVE-2008-3263), when handling
authentication attempts (CVE-2008-5558) and when handling firmware
download (FWDOWNL) requests (CVE-2008-3264). Asterisk does also not
correctly handle SIP INVITE messages that lack a "From" header
(CVE-2008-2119), and responds differently to a failed login attempt
depending on whether the user account exists (CVE-2008-3903,
CVE-2009-0041).
</p>
</description>
<impact type="normal">
<p>
Remote unauthenticated attackers could send specially crafted data to
Asterisk, possibly resulting in a Denial of Service via a daemon crash,
call-number exhaustion, CPU or traffic consumption. Remote
unauthenticated attackers could furthermore enumerate valid usernames
to facilitate brute force login attempts.
</p>
</impact>
<workaround>
<p>
There is no known workaround at this time.
</p>
</workaround>
<resolution>
<p>
All Asterisk users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=net-misc/asterisk-1.2.32&quot;</code>
</resolution>
<references>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1897">CVE-2008-1897</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2119">CVE-2008-2119</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3263">CVE-2008-3263</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3264">CVE-2008-3264</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3903">CVE-2008-3903</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5558">CVE-2008-5558</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0041">CVE-2009-0041</uri>
</references>
<metadata tag="requester" timestamp="Thu, 02 Apr 2009 12:17:04 +0000">
rbu
</metadata>
<metadata tag="submitter" timestamp="Thu, 02 Apr 2009 12:31:27 +0000">
rbu
</metadata>
<metadata tag="bugReady" timestamp="Thu, 02 Apr 2009 12:32:59 +0000">
rbu
</metadata>
</glsa>