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Category:   Application (VPN)  >   OpenSSL Vendors:   OpenSSL.org
OpenSSL CMS_verify() Error Handling Flaw Lets Users Bypass Security Checks
SecurityTracker Alert ID:  1021907
SecurityTracker URL:  http://securitytracker.com/id/1021907
CVE Reference:   CVE-2009-0591   (Links to External Site)
Date:  Mar 25 2009
Impact:   Modification of system information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 0.9.8h - 0.9.8j
Description:   A vulnerability was reported in OpenSSL. A remote user can bypass certain security checks.

A remote user with access to a signer's private key can generate a specially crafted signature that is not valid but will be detected as valid. The vulnerability resides in the CMS_verify() function in the handling of an error condition with specially crafted signed attributes.

Only CMS users are affected.

Ivan Nestlerode reported this vulnerability.

Impact:   A remote user can create an invalid signature that will be determined to be a valid signature.
Solution:   The vendor has issued a fix (0.9.8k).

The vendor's advisory is available at:

http://www.openssl.org/news/secadv_20090325.txt

Vendor URL:  www.openssl.org/news/secadv_20090325.txt (Links to External Site)
Cause:   Authentication error, State error
Underlying OS:   Linux (Any), UNIX (Any), Windows (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
May 11 2009 (IBM Issues Fix) OpenSSL CMS_verify() Error Handling Flaw Lets Users Bypass Security Checks
IBM has issued a fix for AIX 5.2, 5.3, and 6.1.
Jun 10 2009 (HP Issues Fix) OpenSSL CMS_verify() Error Handling Flaw Lets Users Bypass Security Checks
HP has issued a fix for HP-UX 11.11, 11.23, and 11.31.
Jul 8 2009 (NetBSD Issues Fix) OpenSSL CMS_verify() Error Handling Flaw Lets Users Bypass Security Checks
NetBSD has issued a fix for NetBSD 4.0.*.
Jun 17 2010 (HP Issues Fix for OpenVMS) OpenSSL CMS_verify() Error Handling Flaw Lets Users Bypass Security Checks
HP has issued a fix for OpenVMS.



 Source Message Contents

Date:  Wed, 25 Mar 2009 13:43:11 -0500
Subject:  OpenSSL


http://www.openssl.org/news/secadv_20090325.txt

CVE-2009-0591

 
 


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