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Category:   Device (Router/Bridge/Hub)  >   Brocade Switch Vendors:   Brocade Communications Systems
(Brocade Communications Systems Issues Fix for Brocade 5400/5600 vRouters) OpenSSL Alternative Certificate Chain Validation Flaw Lets Remote Users Forge Certificates
SecurityTracker Alert ID:  1034272
SecurityTracker URL:  http://securitytracker.com/id/1034272
CVE Reference:   CVE-2015-1793   (Links to External Site)
Date:  Dec 1 2015
Impact:   Modification of authentication information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 5400 vRouter prior to 6.7R9, 5600 vRouter prior to 3.5R5
Description:   A vulnerability was reported in OpenSSL. A remote user can bypass certificate validation on the target system. Brocade 5400/5600 vRouters are 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:   Brocade Communications Systems has issued a fix for CVE-2015-1793 for Brocade 5400 (6.7R9) and 5600 (3.5R5) series vRouters.

The Brocade Communications Systems advisory is available at:

http://www.brocade.com/content/dam/common/documents/content-types/security-bulletin/brocade-security-advisory-2015-009.pdf

Vendor URL:  www.brocade.com/content/dam/common/documents/content-types/security-bulletin/brocade-security-advisory-2015-009.pdf (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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