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Public Date:
531213: CVE-2009-3563 ntpd: DoS with mode 7 packets (VU#568372)

The MITRE CVE dictionary describes this issue as:

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.

Find out more about CVE-2009-3563 from the MITRE CVE dictionary dictionary and NIST NVD.

CVSS v2 metrics

Base Score 5
Base Metrics AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux 3 (ntp) RHSA-2009:1651 2009-12-08
Red Hat Enterprise Linux 4 (ntp) RHSA-2009:1648 2009-12-08
Red Hat Enterprise Linux 5 (ntp) RHSA-2009:1648 2009-12-08
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