CVE-2009-3563 - CVE House
Back to Database
Status published Medium CVE-2009-3563

ntp_request.c in ntpd in NTP before 4.2.4p8, and 4.2.5, allows...

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2009-3563

Credits & Attribution

No credits recorded in the NVD database.

References

Affected Vendor

Affected Software

ntp
Vulnerable Versions:
0, 4.0.72, 4.0.73, 4.0.90, 4.0.91, 4.0.92, 4.0.93, 4.0.94, 4.0.95, 4.0.96, 4.0.97, 4.0.98, 4.0.99, 4.1.0, 4.1.2, 4.2.0, 4.2.2, 4.2.2p1, 4.2.2p2, 4.2.2p3, 4.2.5

Timeline

Official Publish: December 9th, 2009
Last Modified: August 7th, 2024
Added to House: July 19th, 2026

CVSS Vectors

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.