CVE-2018-0155 KEV
Patch first
On CISA KEV — known exploited in the wild, due 2022-03-17.
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.
Scoring
| CVSS | 8.6 (HIGH, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
| EPSS | 7.74% — more likely to be exploited than 94% of all CVEs |
| Weakness | CWE-388 |
| On CISA KEV | yes — remediate by 2022-03-17 |
| Public exploit | none known |
| Published | 2018-03-28 |
| Last modified | 2026-06-17 |
CISA KEV
| Name | Cisco Catalyst Bidirectional Forwarding Detection Denial-of-Service Vulnerability |
|---|---|
| Added | 2022-03-03 |
| Due | 2022-03-17 |
| Vendor / product | Cisco / Catalyst 4500 Series Switches and Cisco Catalyst 4500-X Series Switches |
| Ransomware use | none reported |
Affected (13)
| Vendor | Product |
|---|---|
| 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 4500-x series switches \(k10\) |
| 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 \(k5\) |
| cisco | ios |
| cisco | ios xe |
| rockwellautomation | allen-bradley stratix 8300 industrial managed ethernet switch |
References
- http://www.securityfocus.com/bid/103565
- http://www.securitytracker.com/id/1040587
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-bfd
- http://www.securityfocus.com/bid/103565
- http://www.securitytracker.com/id/1040587
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-bfd
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0155
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