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<?xml version="1.0" encoding="utf-8"?>
<glsa id="200609-18">
<title>Opera: RSA signature forgery</title>
Opera fails to correctly verify certain signatures.
<product type="ebuild">opera</product>
<announced>September 28, 2006</announced>
<revised>September 28, 2006: 02</revised>
<package name="www-client/opera" auto="yes" arch="*">
<unaffected range="ge">9.02</unaffected>
<vulnerable range="lt">9.02</vulnerable>
Opera is a multi-platform web browser.
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.
<impact type="normal">
An attacker could forge certificates which will appear valid and signed
by a trusted CA.
There is no known workaround at this time.
All Opera users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=www-client/opera-9.02&quot;</code>
<uri link="">Opera Advisory</uri>
<uri link="/security/en/glsa/glsa-200609-05.xml">GLSA 200609-05</uri>
<metadata tag="requester" timestamp="Wed, 27 Sep 2006 07:51:04 +0000">
<metadata tag="bugReady" timestamp="Wed, 27 Sep 2006 14:08:17 +0000">
<metadata tag="submitter" timestamp="Wed, 27 Sep 2006 14:32:20 +0000">