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Category:   Device (Embedded Server/Appliance)  >   Juniper Junos Space Vendors:   Juniper
(Juniper Issues Fix for Juniper Junos Space) OpenSSL Overflow in rsaz_1024_mul_avx2() Lets Remote Users Obtain Potentially Sensitive Information in Certain Cases and SSL_read()/SSL_write() Error State Bug May Bypass Decryption/Encryption in Certain Application Dependent Cases
SecurityTracker Alert ID:  1041333
SecurityTracker URL:  http://securitytracker.com/id/1041333
CVE Reference:   CVE-2017-3737   (Links to External Site)
Date:  Jul 19 2018
Impact:   Disclosure of authentication information, Disclosure of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   Two vulnerabilities were reported in OpenSSL. A remote user can obtain potentially sensitive information on the target system in certain cases. A remote user may be able to cause an application to bypass decryption/encryption in certain limited cases. Juniper Junos Space is affected.

A remote user can exploit an overflow bug in the AVX2 Montgomery multiplication procedure used in exponentiation with 1024-bit moduli to potentially determine information about the private key in certain situations [CVE-2017-3738].

Processors that support the AVX2 but not ADX extensions (e.g., Intel Haswell (4th generation)) are affected.

Attacks against DH1024 may be feasible.

EC algorithms are not affected.

A remote user can invoke a handshake failure to trigger a bug in OpenSSL error handling code for applications that directly make an SSL_read() or SSL_write() call for an SSL object after receiving a fatal error, causing data to bypass the decryption or encryption process [CVE-2017-3737]. Versions 1.0.2b and after are affected.

David Benjamin (Google) reported these vulnerabilities.

Impact:   A remote user can potentially determine information about the private key in certain situations.

A remote user may be able to cause an application to bypass decryption/encryption in certain limited cases.

Solution:   Juniper has issued a fix for CVE-2017-3737 for Juniper Junos Space (18.1R1).

The Juniper advisory is available at:

https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10873

Vendor URL:  kb.juniper.net/InfoCenter/index?page=content&id=JSA10873 (Links to External Site)
Cause:   Boundary error, State error

Message History:   This archive entry is a follow-up to the message listed below.
Dec 7 2017 OpenSSL Overflow in rsaz_1024_mul_avx2() Lets Remote Users Obtain Potentially Sensitive Information in Certain Cases and SSL_read()/SSL_write() Error State Bug May Bypass Decryption/Encryption in Certain Application Dependent Cases



 Source Message Contents

Subject:  https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10873

 
 


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