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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:HCisco Catalyst 4500e Supervisor Engine 8 E \(k10\)
HWCiscoall versionsCisco Catalyst 4500e Supervisor Engine 8l E \(k10\)
HWCiscoall versionsCisco Catalyst 4500e Supervisor Engine 9 E \(k10\)
HWCiscoall versionsCisco Catalyst 4500 Supervisor Engine 6 E \(k5\)
HWCiscoall versionsCisco Catalyst 4500 Supervisor Engine 6l E \(k10\)
HWCiscoall versionsCisco Catalyst 4500 Supervisor Engine 7 E \(k10\)
HWCiscoall versionsCisco Catalyst 4500 Supervisor Engine 7l E \(k10\)
HWCiscoall versionsCisco Catalyst 4500 X Series Switches \(k10\)
HWCiscoall versionsCisco Catalyst 4900m Switch \(k5\)
HWCiscoall versionsCisco Catalyst 4948e Ethernet Switch \(k5\)
HWCiscoall versionsCisco IOS
OSCisco3.6\(2\)eCisco IOS XE
OSCisco3.6\(2\)eRockwellautomation Allen Bradley Stratix 8300 Industrial Managed Ethernet Switch
HWRockwellautomationall versions
CISA KEV — detailsi
- Vendori
- Cisco ↗
- Producti
- Catalyst 4500 Series Switches and Cisco Catalyst 4500-X Series Switches
- Added to KEVi
- March 3, 2022
- Remediation deadline (US Federal)i
- March 17, 2022(overdue)
Apply updates per vendor instructions.
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.
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