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Category:   Device (Firewall)  >   McAfee Firewall Enterprise Vendors:   McAfee
(McAfee Issues Fix for McAfee Firewall Enterprise) OpenSSL Alternative Certificate Chain Validation Flaw Lets Remote Users Forge Certificates
SecurityTracker Alert ID:  1033395
SecurityTracker URL:  http://securitytracker.com/id/1033395
CVE Reference:   CVE-2015-1793   (Links to External Site)
Date:  Aug 27 2015
Impact:   Modification of authentication information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 8.3.2E51
Description:   A vulnerability was reported in OpenSSL. A remote user can bypass certificate validation on the target system. McAfee Firewall Enterprise is affected.

When the validation of a certificate chain fails, the system attempts to validate an alternate certificate chain but does not check the CA flag of untrusted certificates. As a result, a remote user can cause the target system to validate an invalid certificate using a valid leaf certificate.

Applications that verify certificates are affected.

SSL/TLS/DTLS clients and SSL/TLS/DTLS servers using client authentication are affected.

The vendor was notified on June 24, 2015.

Adam Langley/David Benjamin (Google/BoringSSL) reported this vulnerability.

Impact:   A remote user can bypass certificate validation on the target system.
Solution:   McAfee has issued an advisory for McAfee Firewall Enterprise (8.3.2E55) [in July 2015].

The McAfee advisory is available at:

https://kc.mcafee.com/corporate/index?page=content&id=SB10125

Vendor URL:  kc.mcafee.com/corporate/index?page=content&id=SB10125 (Links to External Site)
Cause:   Authentication error

Message History:   This archive entry is a follow-up to the message listed below.
Jul 9 2015 OpenSSL Alternative Certificate Chain Validation Flaw Lets Remote Users Forge Certificates



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