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Category:   Application (Web Browser)  >   Mozilla Firefox Vendors:   Mozilla.org
Mozilla Firefox Certificate Signatures Can Be Forged
SecurityTracker Alert ID:  1016858
SecurityTracker URL:  http://securitytracker.com/id/1016858
CVE Reference:   CVE-2006-4340   (Links to External Site)
Date:  Sep 15 2006
Impact:   Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 1.5.0.7
Description:   A vulnerability was reported in Mozilla Firefox. A remote user may be able to forge certain digital signatures.

If an RSA key with exponent 3 is used, a remote user may be able to forge a PKCS #1 v1.5 signature for that key.

The vulnerability resides in the Mozilla Network Security Services (NSS) library.

Daniel Bleichenbacher reported the type of attack that is possible against PKCS #1 v1.5 signatures.

Philip Mackenzie and Marius Schilder reported that Mozilla is affected.

Impact:   A remote user may be able to forge signatures (and certificates).
Solution:   The vendor has issued a fixed version (1.5.0.7).

The Mozilla advisory is available at:

http://www.mozilla.org/security/announce/2006/mfsa2006-60.html

Vendor URL:  www.mozilla.org/security/announce/2006/mfsa2006-60.html (Links to External Site)
Cause:   Authentication error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Sep 15 2006 (Red Hat Issues Fix) Mozilla Firefox Certificate Signatures Can Be Forged
Red Hat has released a fix for Red Hat Enterprise Linux 4.
Jan 23 2007 (Sun Issues Fix) Mozilla Firefox Certificate Signatures Can Be Forged
Sun has issued a fix for Solaris 10.



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