Date: Thu, 28 Sep 2006 16:06:27 +0200
From: Matthias Geerdsen <vorlon@gentoo.org.>
To: gentoo-announce@gentoo.org
Subject: [ GLSA 200609-18 ] Opera: RSA signature forgery
X-Enigmail-Version: 0.94.0.0
Content-Type: multipart/signed; micalg=pgp-sha1;
protocol="application/pgp-signature";
boundary="------------enigD0A71A317BD631B40EA6FAC6"
X-Virus-Scanned: antivirus-gw at tyumen.ru
This is an OpenPGP/MIME signed message (RFC 2440 and 3156)
--------------enigD0A71A317BD631B40EA6FAC6
Content-Type: text/plain; charset=ISO-8859-15
Content-Transfer-Encoding: quoted-printable
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory GLSA 200609-18
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Normal
Title: Opera: RSA signature forgery
Date: September 28, 2006
Bugs: #147838
ID: 200609-18
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Synopsis
=3D=3D=3D=3D=3D=3D=3D=3D
Opera fails to correctly verify certain signatures.
Background
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Opera is a multi-platform web browser.
Affected packages
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 www-client/opera < 9.0.2 >=3D 9.0.2
Description
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
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
=3D=3D=3D=3D=3D=3D
An attacker could forge certificates which will appear valid and signed
by a trusted CA.
Workaround
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
There is no known workaround at this time.
Resolution
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
All Opera users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=3Dwww-client/opera-9.0.2"
References
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
[ 1 ] Opera Advisory
http://www.opera.com/support/search/supsearch.dml?index=3D845
[ 2 ] GLSA 200609-05
http://www.gentoo.org/security/en/glsa/glsa-200609-05.xml
Availability
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
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?
=3D=3D=3D=3D=3D=3D=3D=3D=3D
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
=3D=3D=3D=3D=3D=3D=3D
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
--------------enigD0A71A317BD631B40EA6FAC6
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="signature.asc"
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.0 (GNU/Linux)
iD8DBQFFG9buGc/RGrFqUYMRAo8mAJ0Ynvu9jHyuNaVM0nODk8MQbBhkvgCfUnGw
l4wX06vBs4WvFRl0ZvenJMY=
=RPlN
-----END PGP SIGNATURE-----
--------------enigD0A71A317BD631B40EA6FAC6--
