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,....
- Published
- Updated
- Exploit status
- Exploited in the wild (confirmed)
Description
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.
CISA Known Exploited Vulnerability
- Date added
- 2022-03-03
- Due date (FCEB)
- 2022-03-17
- Ransomware use
- Unknown
Required action
Apply updates per vendor instructions.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| cisco ios | = 3.6(2)e | No fix listed |
| cisco ios xe | = 3.6(2)e | No fix listed |
References
- 103565 third-party-advisory vdb-entry
- 1040587 third-party-advisory vdb-entry
- ics-cert.us-cert.gov third-party-advisory us-government-resource
- tools.cisco.com vendor-advisory
- www.cisa.gov government-resource us-government-resource