Gentoo Logo

Opera: RSA signature forgery

Content:

1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200609-18 / opera
Release Date September 28, 2006
Latest Revision September 28, 2006: 02
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
www-client/opera < 9.02 >= 9.02 All supported architectures

Related bugreports: #147838

Synopsis

Opera fails to correctly verify certain signatures.

2.  Impact Information

Background

Opera is a multi-platform web browser.

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.

3.  Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All Opera users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=www-client/opera-9.02"

4.  References



Print

Page updated September 28, 2006

Summary: This is a Gentoo Linux Security Advisory

Security Team
Contact Address

Donate to support our development efforts.

Copyright 2001-2014 Gentoo Foundation, Inc. Questions, Comments? Contact us.