67 lines
2 KiB
XML
67 lines
2 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
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<glsa id="200710-14">
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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>2007-10-13</announced>
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<revised count="01">2007-10-13</revised>
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<bug>181213</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-r1</unaffected>
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<vulnerable range="lt">2.6-r1</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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Daniel B. Cid discovered that DenyHosts used an incomplete regular
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expression to parse failed login attempts, a different issue than GLSA
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200701-01.
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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 into the
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blacklist, including the "all" keyword, by submitting specially crafted
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version identification strings to the SSH server banner. An attacker
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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-r1"</code>
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</resolution>
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<references>
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<uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4323">CVE-2007-4323</uri>
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</references>
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<metadata tag="requester" timestamp="2007-10-06T13:32:04Z">
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p-y
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</metadata>
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<metadata tag="bugReady" timestamp="2007-10-06T13:32:42Z">
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p-y
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</metadata>
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<metadata tag="submitter" timestamp="2007-10-07T22:16:56Z">
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falco
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</metadata>
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</glsa>
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