67 lines
2.1 KiB
XML
67 lines
2.1 KiB
XML
<?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="200609-15">
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<title>GnuTLS: RSA Signature Forgery</title>
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<synopsis>
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GnuTLS fails to handle excess data which could allow an attacker to forge a
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PKCS #1 v1.5 signature.
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</synopsis>
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<product type="ebuild">gnutls</product>
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<announced>September 26, 2006</announced>
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<revised>September 26, 2006: 01</revised>
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<bug>147682</bug>
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<access>remote</access>
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<affected>
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<package name="net-libs/gnutls" auto="yes" arch="*">
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<unaffected range="ge">1.4.4</unaffected>
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<vulnerable range="lt">1.4.4</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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GnuTLS is an implementation of SSL 3.0 and TLS 1.0.
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</p>
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</background>
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<description>
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<p>
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verify.c fails to properly handle excess data in
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digestAlgorithm.parameters field while generating a hash when using an
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RSA key with exponent 3. RSA keys that use exponent 3 are commonplace.
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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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Remote attackers could forge PKCS #1 v1.5 signatures that are signed
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with an RSA key, preventing GnuTLS from correctly verifying X.509 and
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other certificates that use PKCS.
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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 GnuTLS users should update both packages:
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</p>
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<code>
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# emerge --sync
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# emerge --update --ask --verbose ">=net-libs/gnutls-1.4.4"</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-2006-4790">CVE-2006-4790</uri>
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</references>
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<metadata tag="requester" timestamp="Sat, 23 Sep 2006 06:35:02 +0000">
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jaervosz
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</metadata>
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<metadata tag="submitter" timestamp="Mon, 25 Sep 2006 13:07:32 +0000">
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hlieberman
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</metadata>
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<metadata tag="bugReady" timestamp="Mon, 25 Sep 2006 18:24:37 +0000">
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falco
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</metadata>
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</glsa>
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