SecurityTracker.com
    Home    |    View Topics    |    Search    |    Contact Us    |   

SecurityTracker
Archives


 


Category:   Application (VPN)  >   GnuTLS Vendors:   gnutls.org
GnuTLS May Allow Digital Signatures to Be Forged
SecurityTracker Alert ID:  1016844
SecurityTracker URL:  http://securitytracker.com/id/1016844
CVE Reference:   CVE-2006-4790   (Links to External Site)
Date:  Sep 14 2006
Impact:   Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 1.4.4
Description:   A vulnerability was reported in GnuTLS. A remote user may be able to forge certain digital signatures.

In certain cases, a remote user may be able to forge a PKCS #1 v1.5 signature for a key.

This can be achieved using a variation of Bleichenbacher's attack, but using the 'digestAlgorithm.parameters' field to store excess data.

This variation was reported Yutaka Oiwa, Kazukuni Kobara, and Hajime Watanabe.

Impact:   A remote user may be able to forge signatures (and certificates).
Solution:   The vendor has issued a fixed version (1.4.4), available at:

http://www.gnu.org/software/gnutls/download.html

Vendor URL:  lists.gnupg.org/pipermail/gnutls-dev/2006-September/001205.html (Links to External Site)
Cause:   Authentication error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Sep 14 2006 (Red Hat Issues Fix) GnuTLS May Allow Digital Signatures to Be Forged
Red Hat has released a fix for Red Hat Enterprise Linux 4.
Jun 22 2007 (Sun Issues Fix) GnuTLS May Allow Digital Signatures to Be Forged
Sun has issued a fix for Solaris 10.



 Source Message Contents



[Original Message Not Available for Viewing]


Go to the Top of This SecurityTracker Archive Page





Home   |    View Topics   |    Search   |    Contact Us

This web site uses cookies for web analytics. Learn More

Copyright 2020, SecurityGlobal.net LLC