CVE-2001-0414
Buffer overflow in ntpd ntp daemon 4.0.99k and earlier (aka xntpd and xntp3) allows remote attackers to cause a denial of service and…
- 10.0HighCVSS base score
- 91.9%Exploitation in 30 daysEPSS · top 0.2% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- 4Public exploitsMetasploit, Nuclei and Exploit-DB
Description
Buffer overflow in ntpd ntp daemon 4.0.99k and earlier (aka xntpd and xntp3) allows remote attackers to cause a denial of service and possibly execute arbitrary commands via a long readvar argument.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list a Metasploit module and 3 Exploit-DB entries for it.
Show the exploits4
Metasploit modules1 module
- NTP Daemon readvar Buffer Overflow (Metasploit module) (opens in a new tab)
exploit/multi/ntp/ntp_overflowRank gooddisclosed 4 Apr 2001
Exploit-DB3 entries
- NTP daemon readvar - Remote Buffer Overflow (Metasploit) (Exploit-DB entry) (opens in a new tab)
EDB-ID 16285remote, linuxpublished 25 Aug 2010Verified
- NTPd - Remote Buffer Overflow (Exploit-DB entry) (opens in a new tab)
EDB-ID 20727remote, linuxpublished 4 Apr 2001Verified
- NTPd 4.0.99j-k readvar - Remote Buffer Overflow (Metasploit) (Exploit-DB entry) (opens in a new tab)
EDB-ID 9940remote, linuxpublished 4 Apr 2001Verified
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By mitre
- 4 months later
· 4 months later
Published
- 23 years later
· 23 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | High10.0 | AV:N/AC:L/Au:N/C:C/I:C/A:C |
- EPSS (exploitation in 30 days)
- 91.9% · top 0.2% of all CVEs (9 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 10.0.
Affected products
n/a
- affected n/a
References
20
- RHSA-2001:045 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- SuSE-SA:2001:10 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- 20010409 [ESA-20010409-01] xntp buffer overflow (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20010409 ntp-4.99k23.tar.gz is available (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- MDKSA-2001:036 (opens in a new tab)vendor-advisoryx_refsource_MANDRAKEx_transferred
- 20010404 ntpd =< 4.0.99k remote buffer overflow (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- CLA-2001:392 (opens in a new tab)vendor-advisoryx_refsource_CONECTIVAx_transferred
- 805 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- 20010409 ntpd - new Debian 2.2 (potato) version is also vulnerable (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 2540 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- oval:org.mitre.oval:def:3831 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- 20010406 Immunix OS Security update for ntp and xntp3 (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20010405 Re: ntpd =< 4.0.99k remote buffer overflow] (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20010413 PROGENY-SA-2001-02A: [UPDATE] ntpd remote buffer overflow (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20010408 [slackware-security] buffer overflow fix for NTP (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20010418 IBM MSS Outside Advisory Redistribution: IBM AIX: Buffer Overflow Vulnerability in (x)ntp (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20010409 PROGENY-SA-2001-02: ntpd remote buffer overflow (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- DSA-045 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- ntpd-remote-bo(6321) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- CSSA-2001-013 (opens in a new tab)vendor-advisoryx_refsource_CALDERAx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2001-0411 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2001-0414)Record last updated .