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Category:   Device (Embedded Server/Appliance)  >   Blue Coat ProxyAV Vendors:   Blue Coat Systems, Symantec
(Blue Coat Systems Issues Advisory for Blue Coat ProxyAV) OpenSSL bn_sqrx8x_internal() Carry Bug Lets Remote Users Obtain Potentially Sensitive Information on the Target System in Certain Cases
SecurityTracker Alert ID:  1039942
SecurityTracker URL:  http://securitytracker.com/id/1039942
CVE Reference:   CVE-2017-3736   (Links to External Site)
Date:  Dec 1 2017
Impact:   Disclosure of authentication information
Vendor Confirmed:  Yes  
Version(s): 3.5
Description:   A vulnerability was reported in OpenSSL. A remote user can obtain potentially sensitive information on the target system in certain cases. Blue Coat ProxyAV is affected.

A remote user can exploit a carry propagation flaw in the the x86_64 Montgomery squaring function bn_sqrx8x_internal() to potentially determine information about the private key in certain situations.

Processors that support the BMI1, BMI2, and ADX extensions (e.g., Intel Broadwell 5th generation and later, AMD Ryzen) are affected.

EC algorithms are not affected.

The Google OSS-Fuzz project reported this vulnerability.

Impact:   A remote user can potentially determine information about the private key in certain situations.
Solution:   Blue Coat Systems has issued an advisory for CVE-2017-3736 for Blue Coat ProxyAV. No solution was available at the time of this entry.

The Blue Coat Systems advisory is available at:

https://www.symantec.com/security-center/network-protection-security-advisories/SA157

Vendor URL:  www.symantec.com/security-center/network-protection-security-advisories/SA157 (Links to External Site)
Cause:   State error

Message History:   This archive entry is a follow-up to the message listed below.
Nov 2 2017 OpenSSL bn_sqrx8x_internal() Carry Bug Lets Remote Users Obtain Potentially Sensitive Information on the Target System in Certain Cases



 Source Message Contents

Subject:  https://www.symantec.com/security-center/network-protection-security-advisories/SA157

 
 


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