CVE-2024-20294
A vulnerability in the Link Layer Discovery Protocol (LLDP) feature of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS)
Description
A vulnerability in the Link Layer Discovery Protocol (LLDP) feature of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper handling of specific fields in an LLDP frame. An attacker could exploit this vulnerability by sending a crafted LLDP packet to an interface of an affected device and having an authenticated user retrieve LLDP statistics from the affected device through CLI show commands or Simple Network Management Protocol (SNMP) requests. A successful exploit could allow the attacker to cause the LLDP service to crash and stop running on the affected device. In certain situations, the LLDP crash may result in a reload of the affected device. Note: LLDP is a Layer 2 link protocol. To exploit this vulnerability, an attacker would need to be directly connected to an interface of an affected device, either physically or logically (for example, through a Layer 2 Tunnel configured to transport the LLDP protocol).
Weakness: CWE-805
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Cisco Firepower Extensible OS (FXOS) | Firewall / NGFW | cna-assigner |
| Cisco | Cisco NX-OS Software | Routing & Switching | cna-assigner |
| Cisco | Cisco Unified Computing System (UCS) | Other Products | cna-assigner |
Vendor-reported products (4)
- Cisco · Cisco NX-OS Software
- Cisco · Cisco Unified Computing System (Managed)
- Cisco · Cisco Firepower Extensible Operating System (FXOS)
- Cisco · Cisco NX-OS System Software in ACI Mode
Vendor advisory
cisco-sa-nxos-lldp-dos-z7PncTgt
Cisco FXOS and NX-OS Software Link Layer Discovery Protocol Denial of Service Vulnerability
Cisco’s rating: Medium (advisory CVSS 6.6) · Published Feb 28, 2024
Bug IDs: CSCwe86457 , CSCwf67408 , CSCwf67409 , CSCwf67411 , CSCwf67412 , CSCwf67468 , CSCwi29934 , CSCwi31871
The vendor’s rating applies to the whole advisory and can differ from this CVE’s own CVSS severity. Where this comes from