CVE-2015-3405
ntp: ntp-keygen may generate non-random symmetric keys on big-endian systems
Severity
LowRed Hat Product Security
CVSS 2.0
Review impact separately from score.
Published · April 9, 2015
Updated · May 13, 2026
Description
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.
Statement
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: https://access.redhat.com/support/policy/updates/errata/.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 2.0 · 4AV:N/AC:H/Au:N/C:P/I:P/A:N
CWE-1241 · Use of Predictable Algorithm in Random Number Generator