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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200609-18">
<title>Opera: RSA signature forgery</title>
<synopsis>
Opera fails to correctly verify certain signatures.
</synopsis>
<product type="ebuild">opera</product>
<announced>September 28, 2006</announced>
<revised>September 28, 2006: 02</revised>
<bug>147838</bug>
<access>remote</access>
<affected>
<package name="www-client/opera" auto="yes" arch="*">
<unaffected range="ge">9.02</unaffected>
<vulnerable range="lt">9.02</vulnerable>
</package>
</affected>
<background>
<p>
Opera is a multi-platform web browser.
</p>
</background>
<description>
<p>
Opera makes use of OpenSSL, which fails to correctly verify PKCS #1
v1.5 RSA signatures signed by a key with exponent 3. Some CAs in
Opera's list of trusted signers are using root certificates with
exponent 3.
</p>
</description>
<impact type="normal">
<p>
An attacker could forge certificates which will appear valid and signed
by a trusted CA.
</p>
</impact>
<workaround>
<p>
There is no known workaround at this time.
</p>
</workaround>
<resolution>
<p>
All Opera users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=www-client/opera-9.02&quot;</code>
</resolution>
<references>
<uri link="http://www.opera.com/support/search/supsearch.dml?index=845">Opera Advisory</uri>
<uri link="/security/en/glsa/glsa-200609-05.xml">GLSA 200609-05</uri>
</references>
<metadata tag="requester" timestamp="Wed, 27 Sep 2006 07:51:04 +0000">
jaervosz
</metadata>
<metadata tag="bugReady" timestamp="Wed, 27 Sep 2006 14:08:17 +0000">
vorlon078
</metadata>
<metadata tag="submitter" timestamp="Wed, 27 Sep 2006 14:32:20 +0000">
vorlon078
</metadata>
</glsa>