A vulnerability in the Unidirectional Link Detection (UDLD) feature of Cisco FXOS Software, Cisco IOS Software, Cisco IOS XE Software, Cisco IOS XR Software, and Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause an affected device to reload. This vulnerability is due to improper input validation of the UDLD packets. An attacker could exploit this vulnerability by sending specifically crafted UDLD packets to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a denial of service (DoS) condition. Note: The UDLD feature is disabled by default, and the conditions to exploit this vulnerability are strict. An attacker must have full control of a directly connected device. On Cisco IOS XR devices, the impact is limited to the reload of the UDLD process.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published: 2021-09-23T02:25:58.322621Z

Updated: 2024-09-16T20:12:12.264Z

Reserved: 2021-06-15T00:00:00

Link: CVE-2021-34714

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-09-23T03:15:18.153

Modified: 2023-11-07T03:36:10.407

Link: CVE-2021-34714

cve-icon Redhat

No data.