The monlist feature in ntp_request.c in ntpd in NTP before 4.2.7p26 allows remote…
Priority HIGH 67CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- Will not fix Red Hat: no fix planned
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.
Summary
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.
Why it matters now
EPSS 0.97549 99th percentileScored 2026-11-07
Fix Will not fix Red Hat: no fix planned
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 31
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:opensuse:opensuse:11.4:*:*:*:*:*:*:* | 11.4 | Vulnerable | openSUSE |
| cpe:2.3:a:ntp:ntp:*:*:*:*:*:*:*:* | before 4.2.7 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.7:-:*:*:*:*:*:* | 4.2.7 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.7:p0:*:*:*:*:*:* | 4.2.7 p0 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.7:p1:*:*:*:*:*:* | 4.2.7 p1 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.7:p10:*:*:*:*:*:* | 4.2.7 p10 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.7:p11:*:*:*:*:*:* | 4.2.7 p11 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.7:p12:*:*:*:*:*:* | 4.2.7 p12 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.7:p13:*:*:*:*:*:* | 4.2.7 p13 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.7:p14:*:*:*:*:*:* | 4.2.7 p14 | Vulnerable | NTP Project |
- cpe:2.3:o:opensuse:opensuse:11.4:*:*:*:*:*:*:* Versions 11.4 Vulnerable ·openSUSE
- cpe:2.3:a:ntp:ntp:*:*:*:*:*:*:*:* Versions before 4.2.7 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.7:-:*:*:*:*:*:* Versions 4.2.7 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.7:p0:*:*:*:*:*:* Versions 4.2.7 p0 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.7:p1:*:*:*:*:*:* Versions 4.2.7 p1 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.7:p10:*:*:*:*:*:* Versions 4.2.7 p10 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.7:p11:*:*:*:*:*:* Versions 4.2.7 p11 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.7:p12:*:*:*:*:*:* Versions 4.2.7 p12 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.7:p13:*:*:*:*:*:* Versions 4.2.7 p13 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.7:p14:*:*:*:*:*:* Versions 4.2.7 p14 Vulnerable ·NTP Project
Show 21 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:ntp:ntp:4.2.7:p15:*:*:*:*:*:* | 4.2.7 p15 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.7:p16:*:*:*:*:*:* | 4.2.7 p16 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.7:p17:*:*:*:*:*:* | 4.2.7 p17 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.7:p18:*:*:*:*:*:* | 4.2.7 p18 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.7:p19:*:*:*:*:*:* | 4.2.7 p19 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.7:p2:*:*:*:*:*:* | 4.2.7 p2 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.7:p20:*:*:*:*:*:* | 4.2.7 p20 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.7:p21:*:*:*:*:*:* | 4.2.7 p21 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.7:p22:*:*:*:*:*:* | 4.2.7 p22 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.7:p23:*:*:*:*:*:* | 4.2.7 p23 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.7:p24:*:*:*:*:*:* | 4.2.7 p24 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.7:p25:*:*:*:*:*:* | 4.2.7 p25 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.7:p3:*:*:*:*:*:* | 4.2.7 p3 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.7:p4:*:*:*:*:*:* | 4.2.7 p4 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.7:p5:*:*:*:*:*:* | 4.2.7 p5 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.7:p6:*:*:*:*:*:* | 4.2.7 p6 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.7:p7:*:*:*:*:*:* | 4.2.7 p7 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.7:p8:*:*:*:*:*:* | 4.2.7 p8 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.7:p9:*:*:*:*:*:* | 4.2.7 p9 | Vulnerable | NTP Project |
| cpe:2.3:o:oracle:linux:6:-:*:*:*:*:*:* | 6 | Vulnerable | Oracle |
| cpe:2.3:o:oracle:linux:7:-:*:*:*:*:*:* | 7 | Vulnerable | Oracle |
- cpe:2.3:a:ntp:ntp:4.2.7:p15:*:*:*:*:*:* Versions 4.2.7 p15 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.7:p16:*:*:*:*:*:* Versions 4.2.7 p16 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.7:p17:*:*:*:*:*:* Versions 4.2.7 p17 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.7:p18:*:*:*:*:*:* Versions 4.2.7 p18 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.7:p19:*:*:*:*:*:* Versions 4.2.7 p19 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.7:p2:*:*:*:*:*:* Versions 4.2.7 p2 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.7:p20:*:*:*:*:*:* Versions 4.2.7 p20 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.7:p21:*:*:*:*:*:* Versions 4.2.7 p21 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.7:p22:*:*:*:*:*:* Versions 4.2.7 p22 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.7:p23:*:*:*:*:*:* Versions 4.2.7 p23 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.7:p24:*:*:*:*:*:* Versions 4.2.7 p24 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.7:p25:*:*:*:*:*:* Versions 4.2.7 p25 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.7:p3:*:*:*:*:*:* Versions 4.2.7 p3 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.7:p4:*:*:*:*:*:* Versions 4.2.7 p4 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.7:p5:*:*:*:*:*:* Versions 4.2.7 p5 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.7:p6:*:*:*:*:*:* Versions 4.2.7 p6 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.7:p7:*:*:*:*:*:* Versions 4.2.7 p7 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.7:p8:*:*:*:*:*:* Versions 4.2.7 p8 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.7:p9:*:*:*:*:*:* Versions 4.2.7 p9 Vulnerable ·NTP Project
- cpe:2.3:o:oracle:linux:6:-:*:*:*:*:*:* Versions 6 Vulnerable ·Oracle
- cpe:2.3:o:oracle:linux:7:-:*:*:*:*:*:* Versions 7 Vulnerable ·Oracle
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 5 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Will not fix |
Not affected: 1 product
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2013-5211
- 2026-10-03 Alias added: GHSA-2q29-vhpq-hpv3
References
Advisory 9
- https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04790232
- openSUSE-SU-2014:1149
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
- HPSBUX02960
- TA14-013A
- VU#348126
- HPSBOV03505
- http://ics-cert.us-cert.gov/advisories/ICSA-14-051-04
- http://aix.software.ibm.com/aix/efixes/security/ntp_advisory.asc
Other 7
- [oss-security] 20131230 CVE to the ntp monlist DDoS issue?
- http://www-947.ibm.com/support/entry/portal/docdisplay?lndocid=MIGR-5095861
- [pool] 20111210 Odd surge in traffic today
- [oss-security] 20131230 Re: CVE to the ntp monlist DDoS issue?
- http://www-947.ibm.com/support/entry/portal/docdisplay?lndocid=MIGR-5095892
- http://bugs.ntp.org/show_bug.cgi?id=1532
- https://puppet.com/security/cve/puppetlabs-ntp-nov-2015-advisory
Sources
- CVE-2013-5211 · CVE Program
- CVE-2013-5211 · NVD
- FIRST EPSS
- GHSA-2q29-vhpq-hpv3 · GitHub Advisory Database · CC BY 4.0
- CVE-2013-5211 · Red Hat security data · CC BY 4.0
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