CVE-2017-6451

Impact:
Low
Public Date:
2017-03-21
IAVA:
2017-A-0084
CWE:
CWE-121
Bugzilla:
1434011: CVE-2017-6451 ntp: Improper use of snprintf() in mx4200_send()
A vulnerability was found in NTP, in the legacy MX4200 refclock implementation. If this refclock was compiled in and used, an attacker may be able to induce stack overflow, leading to a crash or potential code execution.

Find out more about CVE-2017-6451 from the MITRE CVE dictionary dictionary and NIST NVD.

CVSS v3 metrics

NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.

CVSS3 Base Score 7
CVSS3 Base Metrics CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity Impact High
Availability Impact High

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 7 ntp Not affected
Red Hat Enterprise Linux 6 ntp Not affected
Red Hat Enterprise Linux 5 ntp Not affected

Acknowledgements

Red Hat would like to thank the NTP project for reporting this issue. Upstream acknowledges Cure53 as the original reporter.

Mitigation

Properly monitor your ntpd instances, and auto-restart ntpd (without -g) if it stops running.

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