Home/CVE/The monlist feature in ntp_request.c in ntpd in NTP before 4.2.7p26 allows remote attackers to cause a denial of service
CVE

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

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.

MEDIUM · CVSS 5 EPSS 0.92136
Act now
  • EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
  • EPSS percentile: top 0% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
Sigma rules8 YARA rules0
⬡

Weakness Classification

CWE-20Improper Input Validation
▤

Affected Products & Versions

4
opensuseall versions
ntp< 4.2.7
ntpall versions
oracle linuxall versions
⚠

Public Exploits & PoCs

1
dosNTP ntpd monlist Query Reflection - Denial of Service2014-04-28
◈

Detection Rules (IDS/IPS)

1
snort-communitySERVER-OTHER SSDP M-SEARCH ssdp-all potential amplified distributed denial-of-service attemptattempted-dos
Open rulesets (ET Open, Snort Community, abuse.ch) link to source. Commercial rulesets are reference-only.
◈

Sigma Hunt Rules

8
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productcriticalLinux Reverse Shell Indicator
producthighCommunication To LocaltoNet Tunneling Service Initiated - Linux
producthighPotentially Suspicious Malware Callback Communication - Linux
producthighLinux Crypto Mining Pool Connections
producthighCommunication To Ngrok Tunneling Service - Linux
producthighLinux Crypto Mining Indicators
▣

Scoring & Timeline

5
MEDIUM · CVSS v2 (legacy) · cve@mitre.org
View on NVD
This CVE predates CVSS v3; the legacy v2 score is shown so triage still has a severity to work with.
v2 Vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
Published to NVD02 Jan 2014 · 02:59 PM
⚑

Vendor Advisories

6
suse-csafopenSUSE-SU-2024:10181-1
suse-csafSUSE-SU-2015:0259-1
suse-csafSUSE-SU-2015:1173-1
suse-csafSUSE-SU-2015:0259-3
cisa-csafcisa-csaf-csaf_files-OT-white-2014-icsa-14-051-04
🔗

References & Sources

21
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
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 AdvisoryUS 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
Intelligence Graph · click any node to traverse
CVETechnique ActorTool Family
drag to reposition · click any node to traverse · button top-right enlarges
External lookups - second-class, for what we don’t hold ourselves
NVDCVE.orgCISAVulnersExploit-DBGitHub PoCVulnCheck KEVGreyNoise
Vulnerabilities
CISA KEV catalog
CWE weaknesses
CAPEC attack patterns
Package vulnerabilities
Threat intelligence
Threat actors
Tools & malware
ATT&CK techniques
IOCs
Detection & defense
Sigma rules
YARA rules
Atomic Red Team tests
D3FEND countermeasures
Compliance
NIST 800-53
ISO 27001:2022
SOC 2 TSC
PCI-DSS v4.0
CIS Controls v8.1
About
All capabilities
Live statistics
Data sources
Privacy policy
Terms of service
threatengine.sh  ·  Open-source threat intelligence platform  ·  100+ authoritative sources  ·  Every fact traces to its origin