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Category:   Application (Web Server/CGI)  >   IBM InfoSphere Information Server Vendors:   IBM
(IBM Issues Fix for IBM InfoSphere Information Server) OpenSSL Alternative Certificate Chain Validation Flaw Lets Remote Users Forge Certificates
SecurityTracker Alert ID:  1033627
SecurityTracker URL:  http://securitytracker.com/id/1033627
CVE Reference:   CVE-2015-1793   (Links to External Site)
Date:  Sep 22 2015
Impact:   Modification of authentication information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 8.1, 8.5, 8.7, 9.1, 11.3
Description:   A vulnerability was reported in OpenSSL. A remote user can bypass certificate validation on the target system. IBM InfoSphere Information Server 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:   IBM has issued a fix for IBM InfoSphere Information Server (APAR JR53677).

The IBM advisory is available at:

https://www-304.ibm.com/support/docview.wss?uid=swg21963498

Vendor URL:  www-304.ibm.com/support/docview.wss?uid=swg21963498 (Links to External Site)
Cause:   Authentication error
Underlying OS:  Linux (Any), UNIX (AIX), UNIX (HP/UX), UNIX (Solaris - SunOS), Windows (Any)

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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