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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200609-17">
<title>OpenSSH: Denial of service</title>
<synopsis>
A flaw in the OpenSSH daemon allows remote unauthenticated attackers to
cause a Denial of Service.
</synopsis>
<product type="ebuild">openssh</product>
<announced>2006-09-27</announced>
<revised count="02">2006-09-27</revised>
<bug>148228</bug>
<access>remote</access>
<affected>
<package name="net-misc/openssh" auto="yes" arch="*">
<unaffected range="ge">4.3_p2-r5</unaffected>
<vulnerable range="lt">4.3_p2-r5</vulnerable>
</package>
</affected>
<background>
<p>
OpenSSH is a free suite of applications for the SSH protocol, developed
and maintained by the OpenBSD project.
</p>
</background>
<description>
<p>
Tavis Ormandy of the Google Security Team discovered a Denial of
Service vulnerability in the SSH protocol version 1 CRC compensation
attack detector.
</p>
</description>
<impact type="normal">
<p>
A remote unauthenticated attacker may be able to trigger excessive CPU
usage by sending a pathological SSH message, denying service to other
legitimate users or processes.
</p>
</impact>
<workaround>
<p>
The system administrator may disable SSH protocol version 1 in
/etc/ssh/sshd_config.
</p>
</workaround>
<resolution>
<p>
All OpenSSH users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/openssh-4.3_p2-r5"</code>
</resolution>
<references>
<uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4924">CVE-2006-4924</uri>
</references>
<metadata tag="submitter" timestamp="2006-09-21T22:24:46Z">
taviso
</metadata>
<metadata tag="bugReady" timestamp="2006-09-27T16:06:09Z">
vorlon078
</metadata>
</glsa>
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