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Vulnerability Details : CVE-2009-3563

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.
Publish Date : 2009-12-09 Last Update Date : 2017-09-18
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- CVSS Scores & Vulnerability Types

CVSS Score
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of Service
CWE ID CWE id is not defined for this vulnerability

- Additional Vendor Supplied Data

Vendor Impact CVSS Score CVSS Vector Report Date Publish Date
Redhat moderate
AV:N/AC:L/Au:N/C:N/I:N/A:P 2009-10-27 2009-12-08
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- Related OVAL Definitions

Title Definition Id Class Family
AIX xntpd denial-of-service vulnerability oval:org.mitre.oval:def:12141 unix
CVE-2009-3563 unix
DSA-1948 ntp -- denial of service oval:org.mitre.oval:def:7379 unix
DSA-1948-1 ntp - denial of service oval:org.mitre.oval:def:17673 unix
DSA-1992 chrony -- several vulnerabilities oval:org.mitre.oval:def:7310 unix
DSA-1992-1 chrony -- several oval:org.mitre.oval:def:12783 unix
ELSA-2009:1648: ntp security update (Moderate) oval:org.mitre.oval:def:23033 unix
HP-UX Running XNTP, Remote Denial of Service (DoS) and Execution of Arbitrary Code oval:org.mitre.oval:def:19376 unix
NTP mode 7 MODE_PRIVATE Packet Remote Denial of Service Vulnerability oval:org.mitre.oval:def:7076 unix
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 ba... oval:org.mitre.oval:def:11225 unix
RHSA-2009:1648 -- ntp security update (Moderate) oval:org.mitre.oval:def:29266 unix
RHSA-2009:1648: ntp security update (Moderate) oval:com.redhat.rhsa:def:20091648 unix
RHSA-2009:1651: ntp security update (Moderate) oval:com.redhat.rhsa:def:20091651 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2009-3563

# Product Type Vendor Product Version Update Edition Language
1 Application NTP NTP 4.0.72 Version Details Vulnerabilities
2 Application NTP NTP 4.0.73 Version Details Vulnerabilities
3 Application NTP NTP 4.0.90 Version Details Vulnerabilities
4 Application NTP NTP 4.0.91 Version Details Vulnerabilities
5 Application NTP NTP 4.0.92 Version Details Vulnerabilities
6 Application NTP NTP 4.0.93 Version Details Vulnerabilities
7 Application NTP NTP 4.0.94 Version Details Vulnerabilities
8 Application NTP NTP 4.0.95 Version Details Vulnerabilities
9 Application NTP NTP 4.0.96 Version Details Vulnerabilities
10 Application NTP NTP 4.0.97 Version Details Vulnerabilities
11 Application NTP NTP 4.0.98 Version Details Vulnerabilities
12 Application NTP NTP 4.0.99 Version Details Vulnerabilities
13 Application NTP NTP 4.1.0 Version Details Vulnerabilities
14 Application NTP NTP 4.1.2 Version Details Vulnerabilities
15 Application NTP NTP 4.2.0 Version Details Vulnerabilities
16 Application NTP NTP 4.2.2p3 Version Details Vulnerabilities
17 Application NTP NTP 4.2.2 Version Details Vulnerabilities
18 Application NTP NTP 4.2.2p4 Version Details Vulnerabilities
19 Application NTP NTP 4.2.2p1 Version Details Vulnerabilities
20 Application NTP NTP 4.2.2p2 Version Details Vulnerabilities
21 Application NTP NTP 4.2.5 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions

- References For CVE-2009-3563
FEDORA FEDORA-2009-13121
REDHAT RHSA-2010:0095
VUPEN ADV-2010-0528
VUPEN ADV-2010-0993
FEDORA FEDORA-2009-13090
REDHAT RHSA-2009:1648
BID 37255 NTP mode 7 MODE_PRIVATE Packet Remote Denial of Service Vulnerability Release Date:2014-11-14
VUPEN ADV-2010-0510
SECTRACK 1023298
HP SSRT100293
NETBSD NetBSD-SA2010-005
MLIST [security-announce] 20100303 VMSA-2010-0004 ESX Service Console and vMA third party updates CONFIRM

- Metasploit Modules Related To CVE-2009-3563 ntpd Reserved Mode Denial of Service
This module exploits a denial of service vulnerability within the NTP (network time protocol) demon. By sending a single packet to a vulnerable ntpd server (Victim A), spoofed from the IP address of another vulnerable ntpd server (Victim B), both victims will enter an infinite response loop. Note, unless you control the spoofed source host or the real remote host(s), you will not be able to halt the DoS condition once begun!
Module type : auxiliary Rank : normal

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