CVE-2009-3563

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.

• How can I get the fixes?
• What do statuses mean?

References

• MITRE
• NVD
• Launchpad
• Debian

Related Ubuntu Security Notices (USN)

• USN-867-1
• Ntp vulnerability
• 8 December 2009

Other references

• https://www.kb.cert.org/vuls/id/568372
• https://support.ntp.org/bugs/show_bug.cgi?id=1331
• https://www.cve.org/CVERecord?id=CVE-2009-3563