Public Date:
1210324: CVE-2015-3405 ntp: ntp-keygen may generate non-random symmetric keys on big-endian systems
A flaw was found in the way the ntp-keygen utility generated MD5 symmetric keys on big-endian systems. An attacker could possibly use this flaw to guess generated MD5 keys, which could then be used to spoof an NTP client or server.

Find out more about CVE-2015-3405 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue affects the versions of ntp as shipped with Red Hat Enterprise Linux 5.

Red Hat Enterprise Linux 5 is now in Production 3 Phase of the support and maintenance life cycle. This has been rated as having Low security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle:

CVSS v2 metrics

Base Score 4
Base Metrics AV:N/AC:H/Au:N/C:P/I:P/A:N
Access Vector Network
Access Complexity High
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact None

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 7 (ntp) RHSA-2015:2231 2015-11-19
Red Hat Enterprise Linux 6 (ntp) RHSA-2015:1459 2015-07-21

Affected Packages State

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