Guest

Preview Tool

Cisco Bug: CSCur38341 - NTP Attacks Using CVE-2013-5211

Last Modified

Aug 11, 2015

Products (1)

  • Cisco Unified MeetingPlace

Known Affected Releases

8.5 8.6(1.2)

Description (partial)

Symptom:
A vulnerability in Network Time Protocol (NTP) package of Cisco Finesse Software could allow an unauthenticated, remote attacker to cause a
Denial of Service (DoS) condition on an affected device.

The vulnerability is due to processing of MODE_PRIVATE (Mode 7) NTP control messages which have a large amplification vector. An attacker could
exploit this vulnerability by sending Mode 7 control requests to NTP servers and observing responses amplified up to 5500 times in size. An
exploit could allow the attacker to cause a Denial of Service (DoS) condition where the affected NTP server is forced to process and respond with
large response data.

Conditions:
All versions of ntpd prior to 4.2.7 are vulnerable by default.
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.