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Category:   Application (VPN)  >   OpenSSH Vendors:   OpenSSH.org
(IBM Issues Fix for IBM AIX) OpenSSH PAM Privilege Separation Bugs Lets Remote Users Gain Elevated Privileges in Certain Cases
SecurityTracker Alert ID:  1033920
SecurityTracker URL:  http://securitytracker.com/id/1033920
CVE Reference:   CVE-2015-6563, CVE-2015-6564   (Links to External Site)
Date:  Oct 22 2015
Impact:   User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 6.9p1 and prior
Description:   Two vulnerabilities were reported in OpenSSH. A remote user can gain elevated privileges in certain cases.

A remote user that can exploit a separate vulnerability in the unprivileged pre-authentication process to execute arbitrary code can then exploit two separate flaws in sshd(8) to bypass privilege separation controls [CVE-2015-6563, CVE-2015-6564].

Moritz Jodeit of Blue Frost Security GmbH reported these vulnerabilities.

Impact:   A remote user that can exploit an independent vulnerability in the pre-authentication process can bypass the privilege separation controls.
Solution:   IBM has issued a fix for IBM AIX.

The IBM advisory is available at:

http://aix.software.ibm.com/aix/efixes/security/openssh_advisory6.asc

Vendor URL:  aix.software.ibm.com/aix/efixes/security/openssh_advisory6.asc (Links to External Site)
Cause:   Access control error
Underlying OS:  UNIX (AIX)
Underlying OS Comments:  5.3, 6.1, 7.1

Message History:   This archive entry is a follow-up to the message listed below.
Aug 14 2015 OpenSSH PAM Privilege Separation Bugs Lets Remote Users Gain Elevated Privileges in Certain Cases



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