NTP Mode 7 Packet Processing Flaw Lets Remote Users Deny Service
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SecurityTracker Alert ID: 1023298 |
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SecurityTracker URL: http://securitytracker.com/id/1023298
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CVE Reference:
CVE-2009-3563
(Links to External Site)
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Date: Dec 8 2009
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Impact:
Denial of service via network
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Fix Available: Yes Vendor Confirmed: Yes Exploit Included: Yes
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Version(s): prior to 4.2.4p8
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Description:
A vulnerability was reported in ntp. A remote user can cause denial of service conditions.
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.
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Impact:
A remote user can cause excessive CPU and disk space consumption on the target servers.
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Solution:
The vendor has issued a fix (4.2.4p8).
The vendor's advisory is available at:
https://support.ntp.org/bugs/show_bug.cgi?id=1331
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Vendor URL: ntp.org/ (Links to External Site)
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Cause:
Input validation error, Resource error
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Underlying OS:
Linux (Any), UNIX (Any)
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Message History:
This archive entry has one or more follow-up message(s) listed below.
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Source Message Contents
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Date: Tue, 08 Dec 2009 20:55:44 +0000
Subject: ntp
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CVE-2009-3563
https://support.ntp.org/bugs/show_bug.cgi?id=1331
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