Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

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.

Published

2009-12-09T18:30:00.390

Last Modified

2025-04-09T00:30:58.490

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 6.4 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:P/A:P

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: PARTIAL
  • Availability Impact: PARTIAL
Exploitability Score

10.0

Impact Score

4.9

Weaknesses
  • Type: Primary
    NVD-CWE-Other
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application ntp ntp ≤ 4.2.2p4 Yes
Application ntp ntp 4.0.72 Yes
Application ntp ntp 4.0.73 Yes
Application ntp ntp 4.0.90 Yes
Application ntp ntp 4.0.91 Yes
Application ntp ntp 4.0.92 Yes
Application ntp ntp 4.0.93 Yes
Application ntp ntp 4.0.94 Yes
Application ntp ntp 4.0.95 Yes
Application ntp ntp 4.0.96 Yes
Application ntp ntp 4.0.97 Yes
Application ntp ntp 4.0.98 Yes
Application ntp ntp 4.0.99 Yes
Application ntp ntp 4.1.0 Yes
Application ntp ntp 4.1.2 Yes
Application ntp ntp 4.2.0 Yes
Application ntp ntp 4.2.2 Yes
Application ntp ntp 4.2.2p1 Yes
Application ntp ntp 4.2.2p2 Yes
Application ntp ntp 4.2.2p3 Yes
Application ntp ntp 4.2.5 Yes
References