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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="201207-06">
<title>JRuby: Denial of service</title>
<synopsis>A hash collision vulnerability in JRuby allows remote attackers to
cause a Denial of Service condition.
</synopsis>
<product type="ebuild">jruby</product>
<announced>2012-07-09</announced>
<revised count="1">2012-07-09</revised>
<bug>396305</bug>
<access>remote</access>
<affected>
<package name="dev-java/jruby" auto="yes" arch="*">
<unaffected range="ge">1.6.5.1</unaffected>
<vulnerable range="lt">1.6.5.1</vulnerable>
</package>
</affected>
<background>
<p>JRuby is a Java-based Ruby interpreter implementation.</p>
</background>
<description>
<p>JRuby does not properly randomize hash functions to protect against hash
collision attacks.
</p>
</description>
<impact type="normal">
<p>A remote attacker could send a specially crafted input, possibly
resulting in a Denial of Service condition.
</p>
</impact>
<workaround>
<p>There is no known workaround at this time.</p>
</workaround>
<resolution>
<p>All JRuby users should upgrade to the latest version:</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-java/jruby-1.6.5.1"
</code>
</resolution>
<references>
<uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-4838">CVE-2011-4838</uri>
</references>
<metadata timestamp="2012-06-11T19:25:16Z" tag="requester">ackle</metadata>
<metadata timestamp="2012-07-09T22:35:40Z" tag="submitter">ackle</metadata>
</glsa>
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