Vulnerability Monitor

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CVE-2018-0155

A vulnerability in the Bidirectional Forwarding Detection (BFD) offload implementation of Cisco Catalyst 4500 Series Switches and Cisco Catalyst 4500-X Series Switches could allow an unauthenticated, remote attacker to cause a crash of the iosd process, causing a denial of service (DoS) condition. The vulnerability is due to insufficient error handling when the BFD header in a BFD packet is incomplete. An attacker could exploit this vulnerability by sending a crafted BFD message to or across an affected switch. A successful exploit could allow the attacker to trigger a reload of the system. This vulnerability affects Catalyst 4500 Supervisor Engine 6-E (K5), Catalyst 4500 Supervisor Engine 6L-E (K10), Catalyst 4500 Supervisor Engine 7-E (K10), Catalyst 4500 Supervisor Engine 7L-E (K10), Catalyst 4500E Supervisor Engine 8-E (K10), Catalyst 4500E Supervisor Engine 8L-E (K10), Catalyst 4500E Supervisor Engine 9-E (K10), Catalyst 4500-X Series Switches (K10), Catalyst 4900M Switch (K5), Catalyst 4948E Ethernet Switch (K5). Cisco Bug IDs: CSCvc40729.

Published

2018-03-28T22:29:00.420

Last Modified

2025-01-27T20:10:19.450

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 8.6 (HIGH)

CVSSv2 Vector

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

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

10.0

Impact Score

6.9

Weaknesses
  • Type: Secondary
    CWE-388
  • Type: Primary
    CWE-755
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System cisco ios 3.6\(2\)e Yes
Operating System cisco ios_xe 3.6\(2\)e Yes
Hardware cisco catalyst_4500-x_series_switches_\(k10\) - No
Hardware cisco catalyst_4500_supervisor_engine_6-e_\(k5\) - No
Hardware cisco catalyst_4500_supervisor_engine_6l-e_\(k10\) - No
Hardware cisco catalyst_4500_supervisor_engine_7-e_\(k10\) - No
Hardware cisco catalyst_4500_supervisor_engine_7l-e_\(k10\) - No
Hardware cisco catalyst_4500e_supervisor_engine_8-e_\(k10\) - No
Hardware cisco catalyst_4500e_supervisor_engine_8l-e_\(k10\) - No
Hardware cisco catalyst_4500e_supervisor_engine_9-e_\(k10\) - No
Hardware cisco catalyst_4900m_switch_\(k5\) - No
Hardware cisco catalyst_4948e_ethernet_switch_\(k5\) - No
Operating System cisco ios 3.6\(2\)e Yes
Operating System cisco ios_xe 3.6\(2\)e Yes
Hardware rockwellautomation allen-bradley_stratix_8300_industrial_managed_ethernet_switch - No
References