Vulnerability Description
A vulnerability in the Link Layer Discovery Protocol (LLDP) feature for Cisco Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) Mode could allow an unauthenticated, adjacent attacker to cause a memory leak, which could result in an unexpected reload of the device. This vulnerability is due to incorrect error checking when parsing ingress LLDP packets. An attacker could exploit this vulnerability by sending a steady stream of crafted LLDP packets to an affected device. A successful exploit could allow the attacker to cause a memory leak, which could result in a denial of service (DoS) condition when the device unexpectedly reloads. Note: This vulnerability cannot be exploited by transit traffic through the device. The crafted LLDP packet must be targeted to a directly connected interface, and the attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent). In addition, the attack surface for this vulnerability can be reduced by disabling LLDP on interfaces where it is not required.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Nx-Os | 15.2\(1g\) |
| 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://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/ciMitigationVendor Advisory
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/ciMitigationVendor Advisory
FAQ
What is CVE-2023-20089?
CVE-2023-20089 is a vulnerability with a CVSS score of 7.4 (HIGH). A vulnerability in the Link Layer Discovery Protocol (LLDP) feature for Cisco Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) Mode could allow an unauthenticated, adjacen...
How severe is CVE-2023-20089?
CVE-2023-20089 has been rated HIGH with a CVSS base score of 7.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-20089?
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.