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Category:   Application (Security)  >   OpenSSH Vendors:   OpenSSH.org
OpenSSH on Mac OS X Lets Remote Users Deny Service
SecurityTracker Alert ID:  1016672
SecurityTracker URL:  http://securitytracker.com/id/1016672
CVE Reference:   CVE-2006-0393   (Links to External Site)
Date:  Aug 9 2006
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in OpenSSH on Mac OS X. A remote user can cause denial of service conditions.

A remote user can attempt to login to the target OpenSSH server using a nonexistent account to cause the target service to hang. Repeated attempts may cause denial of service conditions.

A remote user can determine whether a specified account name exists on the target sytsem based on whether the OpenSSH service hangs or not.

Apple credits Rob Middleton of the Centenary Institute (Sydney, Australia) with reporting this vulnerability.

Impact:   A remote user can cause the target service to hang.
Solution:   Apple has issued a fix as part of Security Update 2006-004 for Mac Pro.

The Apple advisory is available at:

http://docs.info.apple.com/article.html?artnum=304146

Cause:   Exception handling error, State error
Underlying OS:  UNIX (macOS/OS X)

Message History:   None.


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