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67 lines
2.0 KiB
67 lines
2.0 KiB
<?xml version="1.0" encoding="utf-8"?>
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<?xml-stylesheet href="/xsl/glsa.xsl" type="text/xsl"?>
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<?xml-stylesheet href="/xsl/guide.xsl" type="text/xsl"?>
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<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
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<glsa id="200701-01">
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<title>DenyHosts: Denial of Service</title>
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<synopsis>
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DenyHosts does not correctly parse log entries, potentially causing a
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remote Denial of Service.
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</synopsis>
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<product type="ebuild">denyhosts</product>
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<announced>January 03, 2007</announced>
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<revised>January 03, 2007: 01</revised>
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<bug>157163</bug>
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<access>remote</access>
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<affected>
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<package name="app-admin/denyhosts" auto="yes" arch="*">
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<unaffected range="ge">2.6</unaffected>
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<vulnerable range="lt">2.6</vulnerable>
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</package>
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</affected>
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<background>
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<p>
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DenyHosts is designed to monitor SSH servers for repeated failed login
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attempts.
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</p>
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</background>
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<description>
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<p>
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Tavis Ormandy of the Gentoo Linux Security Audit Team discovered that
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DenyHosts used an incomplete regular expression to parse failed login
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attempts.
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</p>
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</description>
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<impact type="normal">
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<p>
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A remote unauthenticated attacker can add arbitrary hosts to the
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blacklist by attempting to login with a specially crafted username. An
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attacker may use this to prevent legitimate users from accessing a host
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remotely.
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</p>
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</impact>
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<workaround>
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<p>
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There is no known workaround at this time.
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</p>
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</workaround>
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<resolution>
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<p>
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All DenyHosts users should upgrade to the latest version:
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</p>
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<code>
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# emerge --sync
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# emerge --ask --oneshot --verbose ">=app-admin/denyhosts-2.6"</code>
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</resolution>
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<references>
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<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6301">CVE-2006-6301</uri>
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</references>
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<metadata tag="submitter" timestamp="Mon, 18 Dec 2006 22:34:37 +0000">
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taviso
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</metadata>
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<metadata tag="bugReady" timestamp="Mon, 01 Jan 2007 14:18:29 +0000">
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taviso
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</metadata>
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</glsa>
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