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Test ID:1.3.6.1.4.1.25623.1.0.150702
Category:General
Title:NTP < 4.2.8p15 DoS Vulnerability
Summary:Systems that use a CMAC algorithm in ntp.keys will not release a; bit of memory on each packet that uses a CMAC keyid, eventually causing ntpd to run out of memory; and fail. The CMAC cleanup introduced a bug whereby the CMAC data structure was no longer; completely removed.
Description:Summary:
Systems that use a CMAC algorithm in ntp.keys will not release a
bit of memory on each packet that uses a CMAC keyid, eventually causing ntpd to run out of memory
and fail. The CMAC cleanup introduced a bug whereby the CMAC data structure was no longer
completely removed.

Vulnerability Insight:
Please see the references for more information on the vulnerabilities.

Affected Software/OS:
NTPd version prior to 4.2.8p15, 4.3.x prior to version 4.3.101.

Solution:
Update to version 4.2.8p15, 4.3.101 or later.

CVSS Score:
4.0

CVSS Vector:
AV:N/AC:L/Au:S/C:N/I:N/A:P

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2020-15025
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