VULNERABILITY INTELLIGENCE

CVE-2023-20213

CVSS score4.3 MEDIUM
EPSS probability0.30%
CISA KEVNot currently listed
Published2023-11-01
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Description

A vulnerability in the CDP processing feature of Cisco ISE could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition of the CDP process on an affected device. This vulnerability is due to insufficient bounds checking when an affected device processes CDP traffic. An attacker could exploit this vulnerability by sending crafted CDP traffic to the device. A successful exploit could cause the CDP process to crash, impacting neighbor discovery and the ability of Cisco ISE to determine the reachability of remote devices. After a crash, the CDP process must be manually restarted using the cdp enable command in interface configuration mode.

Weakness classification

  • psirt@cisco.com: CWE-787
  • nvd@nist.gov: NVD-CWE-noinfo

Primary references