CVE-2009-3563

Ntp < 4.2.2p4 - Denial of Service

Title source: rule

Description

ntp_request.c in ntpd in NTP before 4.2.4p8, and 4.2.5, allows remote attackers to cause a denial of service (CPU and bandwidth consumption) by using MODE_PRIVATE to send a spoofed (1) request or (2) response packet that triggers a continuous exchange of MODE_PRIVATE error responses between two NTP daemons.

Exploits (1)

metasploit WORKING POC

by todb · rubypoc

https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/dos/ntp/ntpd_reserved_dos.rb

View Code ZIP pw:eip

References (43)

[Various Sources] http://aix.software.ibm.com/aix/efixes/security/xntpd_advisory.asc

[Issue Tracking] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=560074

[Vendor Advisory] http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10673

[Vendor Advisory] http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10691

[Various Sources] http://lists.vmware.com/pipermail/security-announce/2010/000082.html

[Mailing List] http://marc.info/?l=bugtraq&m=130168580504508&w=2

[Mailing List] http://marc.info/?l=bugtraq&m=136482797910018&w=2

[Third Party Advisory] http://secunia.com/advisories/37629

[Vendor Advisory] http://sunsolve.sun.com/search/document.do?assetkey=1-77-1021781.1-1

[Vendor Advisory] http://support.avaya.com/css/P8/documents/100071808

[Patch] http://support.ntp.org/bin/view/Main/SecurityNotice#DoS_attack_from_certain_NTP_mode

[Various Sources] http://www-01.ibm.com/support/docview.wss?uid=isg1IZ68659

[Various Sources] http://www-01.ibm.com/support/docview.wss?uid=isg1IZ71047

[Patch] http://www.debian.org/security/2009/dsa-1948

[Patch, US Government Resource] http://www.kb.cert.org/vuls/id/568372

[Third Party Advisory, US Government Resource] http://www.kb.cert.org/vuls/id/MAPG-7X7V6J

[Third Party Advisory, US Government Resource] http://www.kb.cert.org/vuls/id/MAPG-7X7VD7

[Patch] http://www.securityfocus.com/bid/37255

[Issue Tracking] https://bugzilla.redhat.com/show_bug.cgi?id=531213

[Various Sources] https://lists.ntp.org/pipermail/announce/2009-December/000086.html

... and 23 more

Scores

EPSS 0.7963

EPSS Percentile 99.1%

Details

Status published

Products (21)

ntp/ntp 4.0.72

ntp/ntp 4.0.73

ntp/ntp 4.0.90

ntp/ntp 4.0.91

ntp/ntp 4.0.92

ntp/ntp 4.0.93

ntp/ntp 4.0.94

ntp/ntp 4.0.95

ntp/ntp 4.0.96

ntp/ntp 4.0.97

... and 11 more

Published Dec 09, 2009

Tracked Since Feb 18, 2026