Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| 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 | - |
Related Weaknesses (CWE)
References
- http://www.securityfocus.com/bid/103565Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1040587Third Party AdvisoryVDB Entry
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05Third Party AdvisoryUS Government Resource
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2Vendor Advisory
- http://www.securityfocus.com/bid/103565Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1040587Third Party AdvisoryVDB Entry
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05Third Party AdvisoryUS Government Resource
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-US Government Resource
FAQ
What is CVE-2018-0155?
CVE-2018-0155 is a vulnerability with a CVSS score of 8.6 (HIGH). 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, ...
How severe is CVE-2018-0155?
CVE-2018-0155 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-0155?
Check the references section above for vendor advisories and patch information. Affected products include: Cisco Ios, Cisco Ios Xe, Cisco Catalyst 4500-X Series Switches \(K10\), Cisco Catalyst 4500 Supervisor Engine 6-E \(K5\), Cisco Catalyst 4500 Supervisor Engine 6L-E \(K10\).