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71 lines
2.6 KiB
71 lines
2.6 KiB
<?xml version="1.0" encoding="UTF-8"?>
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<?xml-stylesheet type="text/xsl" href="/xsl/glsa.xsl"?>
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<?xml-stylesheet type="text/xsl" href="/xsl/guide.xsl"?>
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<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
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<glsa id="201201-12">
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<title>Tor: Multiple vulnerabilities</title>
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<synopsis>Multiple vulnerabilities have been found in Tor, the most severe of
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which may allow a remote attacker to execute arbitrary code.
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</synopsis>
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<product type="ebuild">Tor</product>
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<announced>January 23, 2012</announced>
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<revised>January 23, 2012: 1</revised>
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<bug>388769</bug>
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<bug>394969</bug>
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<access>remote</access>
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<affected>
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<package name="net-misc/tor" auto="yes" arch="*">
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<unaffected range="ge">0.2.2.35</unaffected>
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<vulnerable range="lt">0.2.2.35</vulnerable>
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</package>
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</affected>
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<background>
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<p>Tor is an implementation of second generation Onion Routing, a
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connection-oriented anonymizing communication service.
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</p>
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</background>
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<description>
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<p>Multiple vulnerabilities have been discovered in Tor:</p>
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<ul>
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<li>When configured as client or bridge, Tor uses the same TLS
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certificate chain for all outgoing connections (CVE-2011-2768).
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</li>
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<li>When configured as a bridge, Tor relays can distinguish incoming
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bridge connections from client connections (CVE-2011-2769).
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</li>
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<li>An error in or/buffers.c could result in a heap-based buffer overflow
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(CVE-2011-2778).
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</li>
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</ul>
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</description>
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<impact type="normal">
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<p>A remote attacker could possibly execute arbitrary code or cause a
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Denial of Service. Furthermore, a remote relay the user is directly
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connected to may be able to disclose anonymous information about that
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user or enumerate bridges in the user's connection.
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</p>
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</impact>
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<workaround>
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<p>There is no known workaround at this time.</p>
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</workaround>
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<resolution>
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<p>All Tor users should upgrade to the latest version:</p>
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<code>
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# emerge --sync
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# emerge --ask --oneshot --verbose ">=net-misc/tor-0.2.2.35"
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</code>
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</resolution>
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<references>
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<uri link="http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-2768">CVE-2011-2768</uri>
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<uri link="http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-2769">CVE-2011-2769</uri>
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<uri link="http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-2778">CVE-2011-2778</uri>
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</references>
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<metadata timestamp="Sun, 01 Jan 2012 17:49:33 +0000" tag="requester">
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underling
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</metadata>
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<metadata timestamp="Mon, 23 Jan 2012 19:55:45 +0000" tag="submitter">ackle</metadata>
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</glsa>
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