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Gentoo Linux Security Advisory GLSA 200609-18
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http://security.gentoo.org/
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Severity: Normal
Title: Opera: RSA signature forgery
Date: September 28, 2006
Bugs: #147838
ID: 200609-18
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Synopsis
========
Opera fails to correctly verify certain signatures.
Background
==========
Opera is a multi-platform web browser.
Affected packages
=================
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Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 www-client/opera < 9.0.2 >= 9.0.2
Description
===========
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
======
An attacker could forge certificates which will appear valid and signed
by a trusted CA.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All Opera users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=www-client/opera-9.0.2"
References
==========
[ 1 ] Opera Advisory
http://www.opera.com/support/search/supsearch.dml?index=845
[ 2 ] GLSA 200609-05
http://www.gentoo.org/security/en/glsa/glsa-200609-05.xml
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200609-18.xml
Concerns?
=========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.
License
=======
Copyright 2006 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).
The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.5
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