CVE-2009-3563

MediumCVSS 6.4/10Last modified Jun 16, 2026

Description

ntp_request.c in ntpd in NTP before 4.2.4p8, and 4.2.5, allows remote attackers to cause a denial of service (CPU and bandwidth consumption) by using MODE_PRIVATE to send a spoofed (1) request or (2) response packet that triggers a continuous exchange of MODE_PRIVATE error responses between two NTP daemons.

Metrics

CVSS 2.0 6.4/10AV:N/AC:L/Au:N/C:N/I:P/A:P

Affected software

No affected versions have been published.

Timeline

Published
Dec 9, 2009
Last modified
Jun 16, 2026
NVD status
Modified

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CVE-2009-3563: Medium severity, CVSS 6.4 | Vulnix