HOMEVULNERABILITIESCVE-2013-5211
MEDIUMPOC

CVE-2013-5211

CWE-20Published: January 2, 2014· Updated: Jun 16, 2026

5.0
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2013-5211 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A proof-of-concept (PoC) exploit exists for CVE-2013-5211. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityNone
IntegrityNone
AvailabilityP
AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected Vendors & Products

ntp1 product(s)
ntp
openSUSE1 product(s)
opensuse
Oracle1 product(s)
linux
Source: NVD CPE · 5 total CPE entries

Exploit & PoC Resources

POC AVAILABLEProof-of-concept code exists
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/ntp-dev/ntp-dev-4.2.7p26.tar.gz
PATCHhttp://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/ntp-dev/ntp-dev-4.2.7p26.tar.gz
ADVISORYhttp://aix.software.ibm.com/aix/efixes/security/ntp_advisory.asc
ADVISORYhttp://ics-cert.us-cert.gov/advisories/ICSA-14-051-04
ADVISORYhttp://lists.opensuse.org/opensuse-updates/2014-09/msg00031.html
ADVISORYhttp://marc.info/?l=bugtraq&m=144182594518755&w=2
ADVISORYhttp://www.kb.cert.org/vuls/id/348126
ADVISORYhttp://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
ADVISORYhttp://www.securityfocus.com/bid/64692
ADVISORYhttp://www.securitytracker.com/id/1030433
ADVISORYhttp://www.us-cert.gov/ncas/alerts/TA14-013A
ADVISORYhttps://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04790232
ADVISORYhttp://aix.software.ibm.com/aix/efixes/security/ntp_advisory.asc
ADVISORYhttp://ics-cert.us-cert.gov/advisories/ICSA-14-051-04
ADVISORYhttp://lists.opensuse.org/opensuse-updates/2014-09/msg00031.html
ADVISORYhttp://marc.info/?l=bugtraq&m=144182594518755&w=2
ADVISORYhttp://www.kb.cert.org/vuls/id/348126
ADVISORYhttp://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
ADVISORYhttp://www.securityfocus.com/bid/64692
ADVISORYhttp://www.securitytracker.com/id/1030433
ADVISORYhttp://www.us-cert.gov/ncas/alerts/TA14-013A
ADVISORYhttps://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04790232

All References (42)

→
http://aix.software.ibm.com/aix/efixes/security/ntp_advisory.ascThird Party Advisory
→
http://bugs.ntp.org/show_bug.cgi?id=1532Issue Tracking
→
http://ics-cert.us-cert.gov/advisories/ICSA-14-051-04Third Party Advisory · US Government Resource
→
http://lists.ntp.org/pipermail/pool/2011-December/005616.htmlBroken Link
→
http://lists.opensuse.org/opensuse-updates/2014-09/msg00031.htmlThird Party Advisory
→
http://marc.info/?l=bugtraq&m=138971294629419&w=2Mailing List
→
http://marc.info/?l=bugtraq&m=144182594518755&w=2Mailing List · Third Party Advisory
→
http://openwall.com/lists/oss-security/2013/12/30/6Mailing List
→
http://openwall.com/lists/oss-security/2013/12/30/7Mailing List
→
http://secunia.com/advisories/59288Not Applicable
→
http://secunia.com/advisories/59726Not Applicable
→
http://www-947.ibm.com/support/entry/portal/docdisplay?lndocid=MIGR-5095861Broken Link
→
http://www-947.ibm.com/support/entry/portal/docdisplay?lndocid=MIGR-5095892Broken Link
→
http://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/ntp-dev/ntp-dev-4.2.7p26.tar.gzPatch
→
http://www.kb.cert.org/vuls/id/348126Third Party Advisory · US Government Resource

Quick Facts

CVE IDCVE-2013-5211
CVSS Score5.0 / 10
SeverityMEDIUM
WeaknessCWE-20
CISA KEVNo
ExploitPOC
Affected3 vendor(s)
PublishedJan 2, 2014

Related CVEs (CWE-20)

CVE-2020-12389
10.0
CVE-2021-21321
10.0
CVE-2020-6962
10.0
CVE-2020-12388
10.0
CVE-2020-13753
10.0
CVE-2008-6826
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2013-5211 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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