Vulnerability Description
A vulnerability in the Multi-Pod or Multi-Site network configurations for Cisco Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) mode could allow an unauthenticated, remote attacker to unexpectedly restart the device, resulting in a denial of service (DoS) condition. This vulnerability exists because TCP traffic sent to a specific port on an affected device is not properly sanitized. An attacker could exploit this vulnerability by sending crafted TCP data to a specific port that is listening on a public-facing IP address for the Multi-Pod or Multi-Site configuration. A successful exploit could allow the attacker to cause the device to restart unexpectedly, resulting in a DoS condition.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Nx-Os | 15.0\(2e\) |
| 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 93108Tc-Fx3P | - |
| 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 | - |
Related Weaknesses (CWE)
References
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nPatchVendor Advisory
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nPatchVendor Advisory
FAQ
What is CVE-2021-1586?
CVE-2021-1586 is a vulnerability with a CVSS score of 8.6 (HIGH). A vulnerability in the Multi-Pod or Multi-Site network configurations for Cisco Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) mode could allow an unauthenticated, remot...
How severe is CVE-2021-1586?
CVE-2021-1586 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-2021-1586?
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.