CVE-2021-1620
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
23/09/2021
Last modified:
07/11/2023
Description
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.
Impact
Base Score 3.x
7.70
Severity 3.x
HIGH
Base Score 2.0
3.50
Severity 2.0
LOW
Vulnerable products and versions
CPE | From | Up to |
---|---|---|
cpe:2.3:o:cisco:ios:12.2\(6\)i1:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:15.1\(3\)svr1:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:15.1\(3\)svr2:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:15.1\(3\)svr3:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:15.1\(3\)svs:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:15.1\(3\)svs1:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:15.1\(3\)svt1:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:15.1\(3\)svt2:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:15.1\(3\)svu1:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:15.2\(1\)sy2:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:15.2\(1\)sy3:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:15.2\(1\)sy4:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:15.2\(1\)sy5:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:15.2\(1\)sy6:*:*:*:*:*:*:* | ||
cpe:2.3:o:cisco:ios:15.2\(1\)sy7:*:*:*:*:*:*:* |
To consult the complete list of CPE names with products and versions, see this page