CVE-2015-7701
ntp: slow memory leak in CRYPTO_ASSOC
Severity
ModerateRed Hat Product Security
CVSS 2.0
Review impact separately from score.
Published · October 21, 2015
Updated · May 13, 2026
Description
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.
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
Disable NTP autokey authentication by removing, or commenting out, all configuration directives beginning with the 'crypto' keyword in your ntp.conf file.
CVSS / CWE
CVSS 2.0 · 4.3AV:N/AC:M/Au:N/C:N/I:N/A:P
CWE-401 · Missing Release of Memory after Effective Lifetime