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Category:   Device (Firewall)  >   McAfee Firewall Enterprise Vendors:   McAfee
(McAfee Issues Fix for McAfee Firewall Enterprise) Ntpd Symmetric Mode Packet Processing Flaw Lets Remote Users Deny Service
SecurityTracker Alert ID:  1032861
SecurityTracker URL:
CVE Reference:   CVE-2015-1799   (Links to External Site)
Date:  Jul 11 2015
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  

Description:   A vulnerability was reported in Ntpd. A remote user can cause denial of service conditions on the target system. McAfee Firewall Enterprise is affected.

A remote user with knowledge of a symmetric association between two hosts can periodically send a specially crafted packet to one host of the symmetric association to cause both hosts to fail to synchronize.

Systems that are configured to use symmetric key authentication are affected.

Miroslav Lichvar of Red Hat reported this vulnerability.

Impact:   A remote user can cause two hosts of a symmetric association to fail to synchronize.
Solution:   McAfee has issued a fix for McAfee Firewall Enterprise (, 8.2.1E139, 8.3.1E74, 8.3.2E49).

The McAfee advisory is available at:

Vendor URL: (Links to External Site)
Cause:   State error

Message History:   This archive entry is a follow-up to the message listed below.
Apr 7 2015 Ntpd Symmetric Mode Packet Processing Flaw Lets Remote Users Deny Service

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