Vulnerability Description
A vulnerability in the Link Layer Discovery Protocol (LLDP) subsystem of Cisco Nexus 9000 Series Application Centric Infrastructure (ACI) Mode Switch Software could allow an adjacent, unauthenticated attacker to cause a denial of service (DoS) condition or execute arbitrary code with root privileges. The vulnerability is due to improper input validation of certain type, length, value (TLV) fields of the LLDP frame header. An attacker could exploit this vulnerability by sending a crafted LLDP packet to the targeted device. A successful exploit may lead to a buffer overflow condition that could either cause a DoS condition or allow the attacker to execute arbitrary code with root privileges. Note: This vulnerability cannot be exploited by transit traffic through the device; the crafted packet must be targeted to a directly connected interface. This vulnerability affects Cisco Nexus 9000 Series Fabric Switches in ACI mode if they are running a Cisco Nexus 9000 Series ACI Mode Switch Software release prior to 13.2(7f) or any 14.x release.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Nx-Os | < 13.2\(7f\) |
| Cisco | Nexus 93108Tc-Ex | - |
| Cisco | Nexus 93108Tc-Fx | - |
| Cisco | Nexus 93120Tx | - |
| Cisco | Nexus 93128Tx | - |
| Cisco | Nexus 93180Lc-Ex | - |
| Cisco | Nexus 93180Yc-Ex | - |
| Cisco | Nexus 93180Yc-Fx | - |
| Cisco | Nexus 9332Pq | - |
| Cisco | Nexus 9336C-Fx2 | - |
| Cisco | Nexus 9336Pq | - |
| Cisco | Nexus 9348Gc-Fxp | - |
| Cisco | Nexus 9364C | - |
| Cisco | Nexus 9372Px | - |
| Cisco | Nexus 9372Px-E | - |
| Cisco | Nexus 9372Tx | - |
| Cisco | Nexus 9372Tx-E | - |
| Cisco | Nexus 9396Px | - |
| Cisco | Nexus 9396Tx | - |
| Cisco | Nexus 9504 | - |
Related Weaknesses (CWE)
References
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2Vendor Advisory
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2Vendor Advisory
FAQ
What is CVE-2019-1901?
CVE-2019-1901 is a vulnerability with a CVSS score of 8.8 (HIGH). A vulnerability in the Link Layer Discovery Protocol (LLDP) subsystem of Cisco Nexus 9000 Series Application Centric Infrastructure (ACI) Mode Switch Software could allow an adjacent, unauthenticated ...
How severe is CVE-2019-1901?
CVE-2019-1901 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-1901?
Check the references section above for vendor advisories and patch information. Affected products include: Cisco Nx-Os, Cisco Nexus 93108Tc-Ex, Cisco Nexus 93108Tc-Fx, Cisco Nexus 93120Tx, Cisco Nexus 93128Tx.