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Cisco Bug: CSCun66735 - Crafted LLDP packet leads to device crash

Last Modified

Nov 27, 2020

Products (2)

  • Cisco 2600 Series Multiservice Platforms
  • Cisco 2600 Series Multiservice Platforms

Known Affected Releases

15.0(2)SG5.1.1 15.1(2)SG3.0.99 15.2(1)E 15.3(3)S 15.4(1.13)S

Description (partial)

Symptom:
A vulnerability in the Link Layer Discovery Protocol (LLDP) packet processing code of Cisco IOS could allow an unauthenticated, adjacent attacker to cause the crash of an affected device. 

The vulnerability is due to improper handling of crafted LLDP packets. An attacker could exploit this vulnerability by sending a specially crafted LLDP packet. An exploit could allow the attacker to cause a DoS condition on an affected platform.


Conditions:
LLDP packet processing is enabled at the global level and also enabled on the interface receiving and processing the crafted packet
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