71 lines
2.5 KiB
XML
71 lines
2.5 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="200602-10">
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<title>GnuPG: Incorrect signature verification</title>
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<synopsis>
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Applications relying on GnuPG to authenticate digital signatures may
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incorrectly believe a signature has been verified.
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</synopsis>
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<product type="ebuild">gnupg</product>
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<announced>February 18, 2006</announced>
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<revised>February 18, 2006: 01</revised>
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<bug>122721</bug>
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<access>remote</access>
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<affected>
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<package name="app-crypt/gnupg" auto="yes" arch="*">
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<unaffected range="ge">1.4.2.1</unaffected>
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<vulnerable range="lt">1.4.2.1</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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GnuPG (The GNU Privacy Guard) is a free replacement for PGP
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(Pretty Good Privacy). As GnuPG does not rely on any patented
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algorithms, it can be used without any restrictions. gpgv is the
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OpenPGP signature verification tool provided by the GnuPG system.
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</p>
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</background>
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<description>
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<p>
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Tavis Ormandy of the Gentoo Linux Security Auditing Team
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discovered that automated systems relying on the return code of GnuPG
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or gpgv to authenticate digital signatures may be misled by malformed
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signatures. GnuPG documentation states that a return code of zero (0)
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indicates success, however gpg and gpgv may also return zero if no
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signature data was found in a detached signature file.
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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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An attacker may be able to bypass authentication in automated
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systems relying on the return code of gpg or gpgv to authenticate
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digital signatures.
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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 GnuPG 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-crypt/gnupg-1.4.2.1"</code>
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</resolution>
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<references>
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<uri link="http://lists.gnupg.org/pipermail/gnupg-announce/2006q1/000211.html">GnuPG Security Announcement</uri>
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<uri link="http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0455">CVE-2006-0455</uri>
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</references>
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<metadata tag="submitter" timestamp="Wed, 15 Feb 2006 16:05:31 +0000">
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taviso
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</metadata>
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<metadata tag="bugReady" timestamp="Sat, 18 Feb 2006 12:22:36 +0000">
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koon
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</metadata>
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</glsa>
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