First published: Wed Mar 28 2018(Updated: )
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.
Credit: ykramarz@cisco.com ykramarz@cisco.com
Affected Software | Affected Version | How to fix |
---|---|---|
Cisco IOS | =3.6\(2\)e | |
Cisco IOS XE | =3.6\(2\)e | |
Cisco Catalyst 4500-x Series Switches \(k10\) | ||
Cisco Catalyst 4500 Supervisor Engine 6-e \(k5\) | ||
Cisco Catalyst 4500 Supervisor Engine 6l-e \(k10\) | ||
Cisco Catalyst 4500 Supervisor Engine 7-e \(k10\) | ||
Cisco Catalyst 4500 Supervisor Engine 7l-e \(k10\) | ||
Cisco Catalyst 4500e Supervisor Engine 8-e \(k10\) | ||
Cisco Catalyst 4500e Supervisor Engine 8l-e \(k10\) | ||
Cisco Catalyst 4500e Supervisor Engine 9-e \(k10\) | ||
Cisco Catalyst 4900m Switch \(k5\) | ||
Cisco Catalyst 4948e Ethernet Switch \(k5\) | ||
Rockwellautomation Allen-bradley Stratix 8300 Industrial Managed Ethernet Switch | ||
Cisco Catalyst 4500 Series Switches and Cisco Catalyst 4500-X Series Switches | ||
All of | ||
Any of | ||
Cisco IOS | =3.6\(2\)e | |
Cisco IOS XE | =3.6\(2\)e | |
Any of | ||
Cisco Catalyst 4500-x Series Switches \(k10\) | ||
Cisco Catalyst 4500 Supervisor Engine 6-e \(k5\) | ||
Cisco Catalyst 4500 Supervisor Engine 6l-e \(k10\) | ||
Cisco Catalyst 4500 Supervisor Engine 7-e \(k10\) | ||
Cisco Catalyst 4500 Supervisor Engine 7l-e \(k10\) | ||
Cisco Catalyst 4500e Supervisor Engine 8-e \(k10\) | ||
Cisco Catalyst 4500e Supervisor Engine 8l-e \(k10\) | ||
Cisco Catalyst 4500e Supervisor Engine 9-e \(k10\) | ||
Cisco Catalyst 4900m Switch \(k5\) | ||
Cisco Catalyst 4948e Ethernet Switch \(k5\) | ||
All of | ||
Any of | ||
Cisco IOS | =3.6\(2\)e | |
Cisco IOS XE | =3.6\(2\)e | |
Rockwellautomation Allen-bradley Stratix 8300 Industrial Managed Ethernet Switch |
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