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+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
+<glsa id="200710-14">
+ <title>DenyHosts: Denial of service</title>
+ <synopsis>
+ DenyHosts does not correctly parse log entries, potentially causing a
+ remote Denial of Service.
+ </synopsis>
+ <product type="ebuild">denyhosts</product>
+ <announced>2007-10-13</announced>
+ <revised count="01">2007-10-13</revised>
+ <bug>181213</bug>
+ <access>remote</access>
+ <affected>
+ <package name="app-admin/denyhosts" auto="yes" arch="*">
+ <unaffected range="ge">2.6-r1</unaffected>
+ <vulnerable range="lt">2.6-r1</vulnerable>
+ </package>
+ </affected>
+ <background>
+ <p>
+ DenyHosts is designed to monitor SSH servers for repeated failed login
+ attempts.
+ </p>
+ </background>
+ <description>
+ <p>
+ Daniel B. Cid discovered that DenyHosts used an incomplete regular
+ expression to parse failed login attempts, a different issue than GLSA
+ 200701-01.
+ </p>
+ </description>
+ <impact type="normal">
+ <p>
+ A remote unauthenticated attacker can add arbitrary hosts into the
+ blacklist, including the "all" keyword, by submitting specially crafted
+ version identification strings to the SSH server banner. An attacker
+ may use this to prevent legitimate users from accessing a host
+ remotely.
+ </p>
+ </impact>
+ <workaround>
+ <p>
+ There is no known workaround at this time.
+ </p>
+ </workaround>
+ <resolution>
+ <p>
+ All DenyHosts users should upgrade to the latest version:
+ </p>
+ <code>
+ # emerge --sync
+ # emerge --ask --oneshot --verbose "&gt;=app-admin/denyhosts-2.6-r1"</code>
+ </resolution>
+ <references>
+ <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4323">CVE-2007-4323</uri>
+ </references>
+ <metadata tag="requester" timestamp="2007-10-06T13:32:04Z">
+ p-y
+ </metadata>
+ <metadata tag="bugReady" timestamp="2007-10-06T13:32:42Z">
+ p-y
+ </metadata>
+ <metadata tag="submitter" timestamp="2007-10-07T22:16:56Z">
+ falco
+ </metadata>
+</glsa>