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Cisco Bug: CSCum93691 - new Denial of Service (DoS) attacks being reported on mgt server

Last Modified

Feb 09, 2017

Products (1)

  • Cisco Videoscape Distribution Suite Transparent Caching

Known Affected Releases

5.1.1

Description (partial)

Symptom:
A vulnerability in Network Time Protocol (NTP) package of Cisco VDS-TC 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 releases before the fix block_ntp_flood.tgz
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
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