Public Date:
1274255: CVE-2015-7701 ntp: slow memory leak in CRYPTO_ASSOC
A memory leak flaw was found in ntpd's CRYPTO_ASSOC. If ntpd was configured to use autokey authentication, an attacker could send packets to ntpd that would, after several days of ongoing attack, cause it to run out of memory.

Find out more about CVE-2015-7701 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

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-2016:0780 2016-05-10
Red Hat Enterprise Linux 7 (ntp) RHSA-2016:2583 2016-11-03

Affected Packages State

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


Disable NTP autokey authentication by removing, or commenting out, all configuration directives beginning with the 'crypto' keyword in your ntp.conf file.

External References

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