CVE-2023-20213
At a glance Severity MEDIUM 4.3 EPSS EPSS 0.30 % · percentile 23 (2026-10-27) State PUBLISHED Published 2023-11-01 Updated 2025-06-12 Assigner cisco NVD status Modified 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.
Scores Version Score Vector Scored by CVSS 3.1 MEDIUM 4.3 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L cisco CVSS 3.1 MEDIUM 4.3 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L NVD · psirt@cisco.com (Secondary) CVSS 3.1 MEDIUM 4.3 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L NVD · nvd@nist.gov (Primary)
Weaknesses (CWE)
European references
CERT-FR advisories
Affected configurations (NVD CPE) cpe:2.3:a:cisco:identity_services_engine:2.7.0:-:*:*:*:*:*:*cpe:2.3:a:cisco:identity_services_engine:2.7.0:patch1:*:*:*:*:*:*cpe:2.3:a:cisco:identity_services_engine:2.7.0:patch2:*:*:*:*:*:*cpe:2.3:a:cisco:identity_services_engine:2.7.0:patch3:*:*:*:*:*:*cpe:2.3:a:cisco:identity_services_engine:2.7.0:patch4:*:*:*:*:*:*cpe:2.3:a:cisco:identity_services_engine:2.7.0:patch5:*:*:*:*:*:*cpe:2.3:a:cisco:identity_services_engine:2.7.0:patch6:*:*:*:*:*:*cpe:2.3:a:cisco:identity_services_engine:2.7.0:patch7:*:*:*:*:*:*cpe:2.3:a:cisco:identity_services_engine:2.7.0:patch8:*:*:*:*:*:*cpe:2.3:a:cisco:identity_services_engine:2.7.0:patch9:*:*:*:*:*:*cpe:2.3:a:cisco:identity_services_engine:3.0.0:-:*:*:*:*:*:*cpe:2.3:a:cisco:identity_services_engine:3.0.0:patch1:*:*:*:*:*:*cpe:2.3:a:cisco:identity_services_engine:3.0.0:patch2:*:*:*:*:*:*cpe:2.3:a:cisco:identity_services_engine:3.0.0:patch3:*:*:*:*:*:*cpe:2.3:a:cisco:identity_services_engine:3.0.0:patch4:*:*:*:*:*:*cpe:2.3:a:cisco:identity_services_engine:3.0.0:patch5:*:*:*:*:*:*cpe:2.3:a:cisco:identity_services_engine:3.0.0:patch6:*:*:*:*:*:*cpe:2.3:a:cisco:identity_services_engine:3.1:-:*:*:*:*:*:*cpe:2.3:a:cisco:identity_services_engine:3.1:patch1:*:*:*:*:*:*cpe:2.3:a:cisco:identity_services_engine:3.1:patch2:*:*:*:*:*:*cpe:2.3:a:cisco:identity_services_engine:3.1:patch3:*:*:*:*:*:*cpe:2.3:a:cisco:identity_services_engine:3.1:patch4:*:*:*:*:*:*cpe:2.3:a:cisco:identity_services_engine:3.1:patch5:*:*:*:*:*:*cpe:2.3:a:cisco:identity_services_engine:3.2:-:*:*:*:*:*:*cpe:2.3:a:cisco:identity_services_engine:3.2:patch1:*:*:*:*:*:*Affected products
References
Sources
