DEBIAN-CVE-2009-3563

DEBIAN-CVE-2009-3563 PUBLISHED CVSS 8.699999809265137 HIGH

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.

Risk Scores

CVSS v4.0

8.699999809265137

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Affected Products

Vendor	Product	Versions
Debian:11	ntp	0, 0, 0

Timeline

Dec 9, 2009 CVE Published
Apr 28, 2026 CVE Updated

References

https://security-tracker.debian.org/tracker/CVE-2009-3563 advisory

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