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Category:   Device (Encryption/VPN)  >   Citrix NetScaler Vendors:   Citrix
(Citrix Issues Fix for Citrix NetScaler) OpenSSL Double Free Memory Error in ssl3_get_new_session_ticket() Has Unspecified Impact
SecurityTracker Alert ID:  1036828
SecurityTracker URL:  http://securitytracker.com/id/1036828
CVE Reference:   CVE-2015-1791   (Links to External Site)
Date:  Sep 15 2016
Impact:   Not specified
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in OpenSSL. The impact was not specified. Citrix NetScaler is affected.

A remote server can return a specially crafted NewSessionTicket message to a connected multi-threaded client to cause the client to attempt to reuse a previous ticket and trigger a race condition. As a result, a double free memory error may occur in ssl3_get_new_session_ticket().

Emilia Kasper of the OpenSSL development team reported this vulnerability.

Impact:   The impact was not specified.
Solution:   Citrix has issued a fix for CVE-2015-1791 for Citrix NetScaler for the Lights Out Management (LOM) component firmware.

A fix is available for the following NetScaler products:

NetScaler Application Delivery Controller (ADC)
NetScaler Gateway
NetScaler Service Delivery Appliance
CloudBridge (NetScaler SD-WAN)
Command Center Appliance
NetScaler T1 (formerly Citrix ByteMobile)

The Citrix advisory is available at:

http://support.citrix.com/article/CTX216642

Vendor URL:  support.citrix.com/article/CTX216642 (Links to External Site)
Cause:   Access control error, State error

Message History:   This archive entry is a follow-up to the message listed below.
Jun 4 2015 OpenSSL Double Free Memory Error in ssl3_get_new_session_ticket() Has Unspecified Impact



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