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.
Attack Vector Network
Attack Complexity Low
Privileges Required Low
Scope Changed
Confidentiality Impact None
Integrity Impact None
Availability Impact High
User Interaction None
No CVSS v3.0
Access Vector Network
Access Complexity Medium
Authentication Single
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
AV:N/AC:M/Au:S/C:N/I:N/A:P
| Vendors | Products |
|---|---|
| Cisco |
|
Configuration 1 [-]
| AND |
|
References
| Link | Resource |
|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ikev2-ebFrwMPr | Patch Vendor Advisory |
History
No history.
MITRE Information
Status: PUBLISHED
Assigner: cisco
Published: 2021-09-22T00:00:00
Updated: 2021-09-23T02:31:01
Reserved: 2020-11-13T00:00:00
Link: CVE-2021-1620
JSON object: View
NVD Information
Status : Modified
Published: 2021-09-23T03:15:13.030
Modified: 2023-11-07T03:28:48.347
Link: CVE-2021-1620
JSON object: View
Redhat Information
No data.