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Cisco Bug: CSCtd15904 - ipv6 neighbor solicitaion messages are not replied sometimes.

Last Modified

Aug 06, 2018

Products (2)

  • Cisco Nexus 4000 Series Switches
  • Cisco Nexus 4001I Switch Module for IBM BladeCenter

Known Affected Releases

4.1(2)E1(1)

Description (partial)

Symptom:
A vulnerability in IPv6 packet handling routine of Cisco NX-OS could allow an unauthenticated, adjacent attacker to cause a device to stop responding 
to Neighbor Solicitation  (NS) requests, causing a limited Denial of Service (DoS) condition.

The vulnerability is due to improper processing of adjacencies in the IPv6 neighbor table. An attacker could exploit this vulnerability by sending a 
sequence of malformed IPv6 packets to an affected device. An exploit could allow the attacker to cause a device to stop responding to Neighbor 
Solicitation (NS) requests, causing a limited denial of service (DoS) condition.
 
Conditions:
Device configured with IPv6.
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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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