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Category:   Device (Router/Bridge/Hub)  >   F5 BIG-IP Vendors:   F5 Networks
(F5 Issues Fix for BIG-IP) NTP Mode 7 Packet Processing Flaw Lets Remote Users Deny Service
SecurityTracker Alert ID:  1023412
SecurityTracker URL:
CVE Reference:   CVE-2009-3563   (Links to External Site)
Date:  Jan 7 2010
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 9.x, 10.x
Description:   A vulnerability was reported in ntp. A remote user can cause denial of service conditions. F5 BIG-IP is affected.

A remote user can send a specially crafted NTP packet to create a packet reply loop between two target ntpd servers. This may consume excessive CPU and disk resources on the target system.

Robin Park and Dmitri Vinokurov reported this vulnerability.

Impact:   A remote user can cause excessive CPU and disk space consumption on the target servers.
Solution:   F5 has issued a fix for BIG-IP.

The vendor's advisory is available at:

Cause:   Input validation error, Resource error

Message History:   This archive entry is a follow-up to the message listed below.
Dec 8 2009 NTP Mode 7 Packet Processing Flaw Lets Remote Users Deny Service

 Source Message Contents

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