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Category:   Application (Security)  >   OpenSSL Vendors:   OpenSSL.org
(HP Issues Fix for Virtualvault) OpenSSL RSA Signatures Can Be Forged
SecurityTracker Alert ID:  1017149
SecurityTracker URL:  http://securitytracker.com/id/1017149
CVE Reference:   CVE-2006-4339   (Links to External Site)
Date:  Nov 1 2006
Impact:   Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 0.9.7j and prior versions, 0.9.8 - 0.9.8b
Description:   A vulnerability was reported in OpenSSL. 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.

Software that uses PKCS #1 v1.5 may be affected. Software that uses OpenSSL to verify X.509 certificates may also be affected.

Daniel Bleichenbacher reported the type of attack that is possible against PKCS #1 v1.5 signatures.
Impact:   A remote user may be able to forge signatures (and certificates).
Solution:   HP has issued patches for HP-UX running Virtualvault or HP Web Proxy, available at:

http://itrc.hp.com

PHSS_35463 Virtualvault 4.7 OWS (Apache 1.x) update
PHSS_35460 Virtualvault 4.7 IWS update
PHSS_35481 Virtualvault 4.7 TGP update
PHSS_35436 Virtualvault 4.7 OWS (Apache 2.x) update
PHSS_35462 Virtualvault 4.6 OWS update
PHSS_35459 Virtualvault 4.6 IWS update
PHSS_35480 Virtualvault 4.6 TGP update
PHSS_35461 Virtualvault 4.5 OWS update
PHSS_35458 Virtualvault 4.5 IWS update
PHSS_35437 Webproxy server 2.1 (Apache 2.x) update
PHSS_35111 Webproxy server 2.1 (Apache 1.x) update
PHSS_35110 Webproxy server 2.0 update

The HP advisory is available at:

http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c00794048
Vendor URL:  www.openssl.org/news/secadv_20060905.txt (Links to External Site)
Cause:   Authentication error
Underlying OS:   UNIX (HP/UX)

Message History:   This archive entry is a follow-up to the message listed below.
Sep 5 2006 OpenSSL RSA Signatures Can Be Forged


 Source Message Contents
Date:  Wed, 1 Nov 2006 16:39:40 -0500
Subject:  HPSBUX02165 SSRT061266 rev.1 - HP-UX VirtualVault Remote Unauthorized Access



http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c00794048

CVE-2006-4339


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