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Category:   Device (Router/Bridge/Hub)  >   Blue Coat ProxySG Vendors:   Blue Coat Systems
(Blue Coat Issues Fix for ProxySG) OpenSSH SSH v1 CRC Attack Detection Implementation Lets Remote Users Deny Service
SecurityTracker Alert ID:  1021858
SecurityTracker URL:  http://securitytracker.com/id/1021858
CVE Reference:   CVE-2006-4924   (Links to External Site)
Date:  Mar 18 2009
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 4.2, 4.3, 5.2
Description:   A vulnerability was reported in OpenSSH. A remote user can cause denial of service conditions. Blue Coat ProxySG is affected.

A remote user can cause the target OpenSSH service to consume excessive CPU resources when SSH protocol version 1 is enabled.

The flaw resides in the CRC attack detection function in the processing of identical blocks.

Tavis Ormandy of the Google Security Team discovered this vulnerability.

Impact:   A remote user can cause the target service to consume excessive CPU resources.
Solution:   Blue Coat has issued a fix (4.2.10, 4.3.3, 5.2.6) for ProxySG, which is affected by this vulnerability.

The Blue Coat advisory is available at:

https://hypersonic.bluecoat.com/support/securityadvisories/ssh_server_on_sg

Cause:   State error

Message History:   This archive entry is a follow-up to the message listed below.
Sep 26 2006 OpenSSH SSH v1 CRC Attack Detection Implementation Lets Remote Users Deny Service



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