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Category:   OS (UNIX)  >   Apple macOS/OS X Vendors:   Apple
(Apple Issues Fix for Apple OS X) OpenSSH Flaws Let Remote Authenticated Users Obtain Potentially Sensitive Information From Client Memory
SecurityTracker Alert ID:  1035343
SecurityTracker URL:  http://securitytracker.com/id/1035343
CVE Reference:   CVE-2016-0777, CVE-2016-0778   (Links to External Site)
Date:  Mar 21 2016
Impact:   Disclosure of system information, Disclosure of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): OS X 10.9.5, 10.10.5, 10.11 to 10.11.3
Description:   Several vulnerabilities were reported in OpenSSH. A remote authenticated server can obtain potentially sensitive information from OpenSSH client memory on the target system or potentially execute arbitrary code on the target client system. Apple OS X is affected.

An OpenSSH server on an authenticated connection can cause the connected client to leak portions of client memory to the server [CVE-2016-0777]. This may include private client user keys.

The Qualys Security team reported this vulnerability.

An OpenSSH server on an authenticated connection may be able to trigger a buffer overflow and file descriptor leak in the connected client in certain cases when using ProxyCommand, ForwardAgent, or ForwardX11 [CVE-2016-0778].

The Qualys Security team reported this vulnerability.

A user may be able to trigger an out-of-bounds read access error in the packet handling code [CVE-2016-1907]. Ben Hawkes reported this vulnerability.

Impact:   A remote authenticated server can obtain potentially sensitive information from the target connected client.
Solution:   Apple has issued a fix for CVE-2016-0777 and CVE-2016-0778 for Apple OS X (OS X El Capitan v10.11.4 and Security Update 2016-002).

The Apple advisory is available at:

https://support.apple.com/en-us/HT206167

Vendor URL:  support.apple.com/en-us/HT206167 (Links to External Site)
Cause:   Access control error, Boundary error

Message History:   This archive entry is a follow-up to the message listed below.
Jan 14 2016 OpenSSH Flaws Let Remote Authenticated Users Obtain Potentially Sensitive Information From Client Memory



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