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Vulnerability Details : CVE-2013-5211

The monlist feature in ntp_request.c in ntpd in NTP before 4.2.7p26 allows remote attackers to cause a denial of service (traffic amplification) via forged (1) REQ_MON_GETLIST or (2) REQ_MON_GETLIST_1 requests, as exploited in the wild in December 2013.
Publish Date : 2014-01-02 Last Update Date : 2016-12-21
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- CVSS Scores & Vulnerability Types

CVSS Score
5.0
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
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 20

- Related OVAL Definitions

Title Definition Id Class Family
Network Time Protocol (NTP) vulnerability in AIX oval:org.mitre.oval:def:24449 unix
SUSE-SU-2014:0937-1 -- Security update for ntp oval:org.mitre.oval:def:26210 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-2013-5211

# Product Type Vendor Product Version Update Edition Language
1 OS Novell Opensuse 11.4 Version Details Vulnerabilities
2 Application NTP NTP 4.2.7 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Novell Opensuse 1
NTP NTP 1

- References For CVE-2013-5211

http://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/ntp-dev/ntp-dev-4.2.7p26.tar.gz CONFIRM
http://www.us-cert.gov/ncas/alerts/TA14-013A
CERT TA14-013A
http://www.securityfocus.com/bid/64692
BID 64692 NTP 'ntp_request.c' Remote Denial of Service Vulnerability Release Date:2014-07-22
http://openwall.com/lists/oss-security/2013/12/30/7
MLIST [oss-security] 20131230 Re: CVE to the ntp monlist DDoS issue?
https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04790232 CONFIRM
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html CONFIRM
http://marc.info/?l=bugtraq&m=144182594518755&w=2
HP HPSBOV03505
http://ics-cert.us-cert.gov/advisories/ICSA-14-051-04
http://www.kb.cert.org/vuls/id/348126
CERT-VN VU#348126
http://www-947.ibm.com/support/entry/portal/docdisplay?lndocid=MIGR-5095861 CONFIRM
http://www-947.ibm.com/support/entry/portal/docdisplay?lndocid=MIGR-5095892 CONFIRM
http://openwall.com/lists/oss-security/2013/12/30/6
MLIST [oss-security] 20131230 CVE to the ntp monlist DDoS issue?
http://lists.ntp.org/pipermail/pool/2011-December/005616.html
MLIST [pool] 20111210 Odd surge in traffic today
http://marc.info/?l=bugtraq&m=138971294629419&w=2
HP HPSBUX02960
http://lists.opensuse.org/opensuse-updates/2014-09/msg00031.html
SUSE openSUSE-SU-2014:1149
http://aix.software.ibm.com/aix/efixes/security/ntp_advisory.asc CONFIRM
http://bugs.ntp.org/show_bug.cgi?id=1532 CONFIRM
http://www.securitytracker.com/id/1030433
SECTRACK 1030433

- Metasploit Modules Related To CVE-2013-5211

NTP Monitor List Scanner
This module identifies NTP servers which permit "monlist" queries and obtains the recent clients list. The monlist feature allows remote attackers to cause a denial of service (traffic amplification) via spoofed requests. The more clients there are in the list, the greater the amplification.
Module type : auxiliary Rank : normal
NTP Mode 7 PEER_LIST DoS Scanner
This module identifies NTP servers which permit "PEER_LIST" queries and return responses that are larger in size or greater in quantity than the request, allowing remote attackers to cause a distributed, reflected denial of service (aka, "DRDoS" or traffic amplification) via spoofed requests.
Module type : auxiliary Rank : normal
NTP Mode 7 PEER_LIST_SUM DoS Scanner
This module identifies NTP servers which permit "PEER_LIST_SUM" queries and return responses that are larger in size or greater in quantity than the request, allowing remote attackers to cause a distributed, reflected denial of service (aka, "DRDoS" or traffic amplification) via spoofed requests.
Module type : auxiliary Rank : normal
NTP Clock Variables Disclosure
This module reads the system internal NTP variables. These variables contain potentially sensitive information, such as the NTP software version, operating system version, peers, and more.
Module type : auxiliary Rank : normal
NTP Mode 6 REQ_NONCE DRDoS Scanner
This module identifies NTP servers which permit mode 6 REQ_NONCE requests that can be used to conduct DRDoS attacks. In some configurations, NTP servers will respond to REQ_NONCE requests with a response larger than the request, allowing remote attackers to cause a distributed, reflected denial of service (aka, "DRDoS" or traffic amplification) via spoofed requests.
Module type : auxiliary Rank : normal
NTP Mode 7 GET_RESTRICT DRDoS Scanner
This module identifies NTP servers which permit "reslist" queries and obtains the list of restrictions placed on various network interfaces, networks or hosts. The reslist feature allows remote attackers to cause a distributed, reflected denial of service (aka, "DRDoS" or traffic amplification) via spoofed requests. The more interfaces, networks or hosts with specific restrictions, the greater the amplification. requests.
Module type : auxiliary Rank : normal
NTP Mode 6 UNSETTRAP DRDoS Scanner
This module identifies NTP servers which permit mode 6 UNSETTRAP requests that can be used to conduct DRDoS attacks. In some configurations, NTP servers will respond to UNSETTRAP requests with multiple packets, allowing remote attackers to cause a distributed, reflected denial of service (aka, "DRDoS" or traffic amplification) via spoofed requests.
Module type : auxiliary Rank : normal
Portmapper Amplification Scanner
This module can be used to discover Portmapper services which can be used in an amplification DDoS attack against a third party.
Module type : auxiliary Rank : normal
UDP Amplification Scanner
Detect UDP endpoints with UDP amplification vulnerabilities
Module type : auxiliary Rank : normal
SSDP ssdp:all M-SEARCH Amplification Scanner
Discover SSDP amplification possibilities
Module type : auxiliary Rank : normal


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