CVE-2016-9311

Impact:
Moderate
Public Date:
2016-11-21
IAVA:
2017-A-0003
CWE:
CWE-476
Bugzilla:
1398350: CVE-2016-9311 ntp: Null pointer dereference when trap service is enabled
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.

Find out more about CVE-2016-9311 from the MITRE CVE dictionary dictionary and NIST NVD.

CVSS v2 metrics

Base Score 4.3
Base Metrics AV:N/AC:M/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial

CVSS v3 metrics

CVSS3 Base Score 5.9
CVSS3 Base Metrics CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity Impact None
Availability Impact High

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux 6 (ntp) RHSA-2017:0252 2017-02-06
Red Hat Enterprise Linux 7 (ntp) RHSA-2017:0252 2017-02-06

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 5 ntp Will not fix

Mitigation

Use "restrict default noquery ..." in your ntp.conf file. Only allow mode 6 queries from trusted networks and hosts.

External References

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