CVE-2016-9311
ntp: Null pointer dereference when trap service is enabled
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
ntpd in NTP before 4.2.8p9, when the trap service is enabled, allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a crafted packet.
ntpd en NTP en versiones anteriores a 4.2.8p9, cuando el servicio de captura está habilitado, permite a atacantes remotos provocar una denegación de servicio (referencia a puntero NULL y caída) a través de un paquete manipulado.
A flaw was found in the way ntpd implemented the trap service. A remote attacker could send a specially crafted packet to cause a null pointer dereference that will crash ntpd, resulting in a denial of service.
The Network Time Protocol is used to synchronize a computer's time with another referenced time source. These packages include the ntpd service which continuously adjusts system time and utilities used to query and configure the ntpd service. Security Fix: It was found that when ntp is configured with rate limiting for all associations the limits are also applied to responses received from its configured sources. A remote attacker who knows the sources can cause a denial of service by preventing ntpd from accepting valid responses from its sources.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2016-11-14 CVE Reserved
- 2017-01-13 CVE Published
- 2024-08-06 CVE Updated
- 2025-03-30 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-476: NULL Pointer Dereference
CAPEC
References (15)
| URL | Tag | Source |
|---|---|---|
| http://www.securityfocus.com/bid/94444 | Third Party Advisory | |
| http://www.securitytracker.com/id/1037354 | Vdb Entry | |
| https://bto.bluecoat.com/security-advisory/sa139 | X_refsource_confirm | |
| https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03706en_us | X_refsource_confirm | |
| https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03799en_us | X_refsource_confirm | |
| https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03885en_us | X_refsource_confirm | |
| https://www.kb.cert.org/vuls/id/633847 | Third Party Advisory |
|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| http://nwtime.org/ntp428p9_release | 2019-01-24 | |
| http://rhn.redhat.com/errata/RHSA-2017-0252.html | 2019-01-24 | |
| http://support.ntp.org/bin/view/Main/NtpBug3119 | 2019-01-24 | |
| http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities | 2019-01-24 | |
| https://security.FreeBSD.org/advisories/FreeBSD-SA-16:39.ntp.asc | 2019-01-24 | |
| https://usn.ubuntu.com/3707-2 | 2019-01-24 | |
| https://access.redhat.com/security/cve/CVE-2016-9311 | 2017-02-06 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1398350 | 2017-02-06 |