[Full-disclosure] [ GLSA 200609-18 ] Opera: RSA signature forgery

2006-09-28T00:00:00
ID SECURITYVULNS:DOC:14485
Type securityvulns
Reporter Securityvulns
Modified 2006-09-28T00:00:00

Description


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

Opera fails to correctly verify certain signatures.

Background

Opera is a multi-platform web browser.

Affected packages

-------------------------------------------------------------------
 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 &quot;&gt;=www-client/opera-9.0.2&quot;

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