A vulnerability in the Internet Key Exchange Version 2 (IKEv2) support for the AutoReconnect feature of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker to exhaust the free IP addresses from the assigned local pool. This vulnerability occurs because the code does not release the allocated IP address under certain failure conditions. An attacker could exploit this vulnerability by trying to connect to the device with a non-AnyConnect client. A successful exploit could allow the attacker to exhaust the IP addresses from the assigned local pool, which prevents users from logging in and leads to a denial of service (DoS) condition.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published: 2021-09-23T02:31:01.213819Z

Updated: 2024-09-17T00:41:20.139Z

Reserved: 2020-11-13T00:00:00

Link: CVE-2021-1620

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-09-23T03:15:13.030

Modified: 2023-11-07T03:28:48.347

Link: CVE-2021-1620

cve-icon Redhat

No data.