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Last updated: 5/31/2016 6:56:23 PM

CVE Publication rate: 19.57

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Vulnerability Workload Index: 12.29
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Vulnerability Summary for CVE-2009-3563

Original release date: 12/09/2009
Last revised: 12/04/2013


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.


CVSS Severity (version 2.0):
CVSS v2 Base Score: 6.4 MEDIUM
Impact Subscore: 4.9
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows unauthorized modification; Allows disruption of service

References to Advisories, Solutions, and Tools

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External Source: VUPEN
Name: ADV-2010-0528
External Source: CONFIRM
Name: http://www.kb.cert.org/vuls/id/MAPG-7X7V6J
External Source: DEBIAN
Name: DSA-1948
Type: Patch Information
External Source: CONFIRM
Name: http://support.avaya.com/css/P8/documents/100071808
External Source: FEDORA
Name: FEDORA-2009-13121
External Source: BID
Name: 37255
Type: Patch Information
External Source: CONFIRM
Name: https://bugzilla.redhat.com/show_bug.cgi?id=531213
External Source: MLIST
Name: [security-announce] 20100303 VMSA-2010-0004 ESX Service Console and vMA third party updates
External Source: OVAL
Name: oval:org.mitre.oval:def:7076
External Source: OVAL
Name: oval:org.mitre.oval:def:12141
US-CERT Vulnerability Note: CERT-VN
Name: VU#568372
Type: Patch Information
External Source: SUNALERT
Name: 1021781
External Source: REDHAT
Name: RHSA-2010:0095
External Source: REDHAT
Name: RHSA-2009:1651
External Source: CONFIRM
Name: http://security-tracker.debian.org/tracker/CVE-2009-3563
External Source: OVAL
Name: oval:org.mitre.oval:def:11225
External Source: CONFIRM
Name: http://support.ntp.org/bin/view/Main/SecurityNotice#DoS_attack_from_certain_NTP_mode
Type: Patch Information
External Source: FEDORA
Name: FEDORA-2009-13090
External Source: NETBSD
Name: NetBSD-SA2010-005
External Source: CONFIRM
Name: http://www.kb.cert.org/vuls/id/MAPG-7X7VD7
External Source: CONFIRM
Name: http://aix.software.ibm.com/aix/efixes/security/xntpd_advisory.asc
External Source: VUPEN
Name: ADV-2010-0993
External Source: OVAL
Name: oval:org.mitre.oval:def:19376
External Source: VUPEN
Name: ADV-2010-0510
External Source: HP
Name: HPSBUX02859
External Source: REDHAT
Name: RHSA-2009:1648
External Source: SECTRACK
Name: 1023298
External Source: AIXAPAR
Name: IZ71047
External Source: CONFIRM
Name: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=560074
External Source: AIXAPAR
Name: IZ68659

References to Check Content

Identifier: oval:org.mitre.oval:def:11225
Check System: http://oval.mitre.org/XMLSchema/oval-definitions-5
Identifier: oval:org.mitre.oval:def:12141
Check System: http://oval.mitre.org/XMLSchema/oval-definitions-5
Identifier: oval:org.mitre.oval:def:7076
Check System: http://oval.mitre.org/XMLSchema/oval-definitions-5

Technical Details

Vulnerability Type (View All)