Vulnerability Description
A vulnerability with the Border Gateway Protocol (BGP) for Cisco Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) mode could allow an unauthenticated, remote attacker to cause a routing process to crash, which could lead to a denial of service (DoS) condition. This vulnerability is due to an issue with the installation of routes upon receipt of a BGP update. An attacker could exploit this vulnerability by sending a crafted BGP update to an affected device. A successful exploit could allow the attacker to cause the routing process to crash, which could cause the device to reload. This vulnerability applies to both Internal BGP (IBGP) and External BGP (EBGP). Note: The Cisco implementation of BGP accepts incoming BGP traffic from explicitly configured peers only. To exploit this vulnerability, an attacker would need to send a specific BGP update message over an established TCP connection that appears to come from a trusted BGP peer.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Nx-Os | 12.0\(1m\) |
| Cisco | Nexus 9000V | - |
| Cisco | Nexus 92160Yc-X | - |
| Cisco | Nexus 92300Yc | - |
| Cisco | Nexus 92304Qc | - |
| Cisco | Nexus 92348Gc-X | - |
| Cisco | Nexus 9236C | - |
| Cisco | Nexus 9272Q | - |
| Cisco | Nexus 93108Tc-Ex | - |
| Cisco | Nexus 93108Tc-Ex-24 | - |
| Cisco | Nexus 93108Tc-Fx | - |
| Cisco | Nexus 93108Tc-Fx-24 | - |
| Cisco | Nexus 93120Tx | - |
| Cisco | Nexus 93128Tx | - |
| Cisco | Nexus 9316D-Gx | - |
| Cisco | Nexus 93180Lc-Ex | - |
| Cisco | Nexus 93180Yc-Ex | - |
| Cisco | Nexus 93180Yc-Ex-24 | - |
| Cisco | Nexus 93180Yc-Fx | - |
| Cisco | Nexus 93180Yc-Fx-24 | - |
Related Weaknesses (CWE)
References
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nVendor Advisory
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nVendor Advisory
FAQ
What is CVE-2021-1230?
CVE-2021-1230 is a vulnerability with a CVSS score of 8.6 (HIGH). A vulnerability with the Border Gateway Protocol (BGP) for Cisco Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) mode could allow an unauthenticated, remote attacker to c...
How severe is CVE-2021-1230?
CVE-2021-1230 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-2021-1230?
Check the references section above for vendor advisories and patch information. Affected products include: Cisco Nx-Os, Cisco Nexus 9000V, Cisco Nexus 92160Yc-X, Cisco Nexus 92300Yc, Cisco Nexus 92304Qc.