73 lines
2.6 KiB
XML
73 lines
2.6 KiB
XML
<?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="200611-06">
|
|
<title>OpenSSH: Multiple Denial of Service vulnerabilities</title>
|
|
<synopsis>
|
|
Several Denial of Service vulnerabilities have been identified in OpenSSH.
|
|
</synopsis>
|
|
<product type="ebuild">openssh</product>
|
|
<announced>November 13, 2006</announced>
|
|
<revised>November 13, 2006: 01</revised>
|
|
<bug>149502</bug>
|
|
<access>remote</access>
|
|
<affected>
|
|
<package name="net-misc/openssh" auto="yes" arch="*">
|
|
<unaffected range="ge">4.4_p1-r5</unaffected>
|
|
<vulnerable range="lt">4.4_p1-r5</vulnerable>
|
|
</package>
|
|
</affected>
|
|
<background>
|
|
<p>
|
|
OpenSSH is a complete SSH protocol version 1.3, 1.5 and 2.0
|
|
implementation and includes sftp client and server support.
|
|
</p>
|
|
</background>
|
|
<description>
|
|
<p>
|
|
Tavis Ormandy of the Google Security Team has discovered a
|
|
pre-authentication vulnerability, causing sshd to spin until the login
|
|
grace time has been expired. Mark Dowd found an unsafe signal handler
|
|
that was vulnerable to a race condition. It has also been discovered
|
|
that when GSSAPI authentication is enabled, GSSAPI will in certain
|
|
cases incorrectly abort.
|
|
</p>
|
|
</description>
|
|
<impact type="normal">
|
|
<p>
|
|
The pre-authentication and signal handler vulnerabilities can cause a
|
|
Denial of Service in OpenSSH. The vulnerability in the GSSAPI
|
|
authentication abort could be used to determine the validity of
|
|
usernames on some platforms.
|
|
</p>
|
|
</impact>
|
|
<workaround>
|
|
<p>
|
|
There is no known workaround at this time.
|
|
</p>
|
|
</workaround>
|
|
<resolution>
|
|
<p>
|
|
All OpenSSH users should upgrade to the latest version:
|
|
</p>
|
|
<code>
|
|
# emerge --sync
|
|
# emerge --ask --oneshot --verbose ">=net-misc/openssh-4.4_p1-r5"</code>
|
|
</resolution>
|
|
<references>
|
|
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5051">CVE-2006-5051</uri>
|
|
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5052">CVE-2006-5052</uri>
|
|
<uri link="http://www.openssh.com/txt/release-4.4">OpenSSH Security Advisory</uri>
|
|
</references>
|
|
<metadata tag="requester" timestamp="Mon, 06 Nov 2006 00:03:31 +0000">
|
|
vorlon078
|
|
</metadata>
|
|
<metadata tag="bugReady" timestamp="Mon, 06 Nov 2006 12:18:14 +0000">
|
|
vorlon078
|
|
</metadata>
|
|
<metadata tag="submitter" timestamp="Mon, 06 Nov 2006 19:31:09 +0000">
|
|
daxomatic
|
|
</metadata>
|
|
</glsa>
|