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.
References
Link | Resource |
---|---|
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ikev2-ebFrwMPr | Patch Vendor Advisory |
Configurations
Configuration 1 (hide)
AND |
|
History
No history.
Information
Published : 2021-09-23 03:15
Updated : 2024-02-28 18:48
NVD link : CVE-2021-1620
Mitre link : CVE-2021-1620
CVE.ORG link : CVE-2021-1620
JSON object : View
Products Affected
cisco
- catalyst_9300-24u-a
- catalyst_3850-16xs-e
- catalyst_9407r
- asr_1000_series_route_processor_\(rp3\)
- catalyst_9300-48p-e
- catalyst_3650-8x24pd-e
- catalyst_9410r
- ess-3300-24t-ncp-a
- ess-3300-24t-con-a
- catalyst_3650-12x48fd-l
- ess-3300-24t-con-e
- 8812
- catalyst_9300-24s-e
- catalyst_9300l-24t-4x-a
- 4000_integrated_services_router
- catalyst_9300l-48p-4g-e
- catalyst_3650-24pdm
- catalyst_3650-48fqm-s
- 1109-2p_integrated_services_router
- catalyst_3650-48ts-l
- catalyst_3850-32xs-s
- catalyst_9800-cl
- catalyst_3650-24pd
- catalyst_9300l-48p-4g-a
- catalyst_9300-24t-a
- catalyst_8540msr
- catalyst_3650
- catalyst_9300l-24p-4x-e
- catalyst_9800_embedded_wireless_controller
- catalyst_3650-12x48uq
- catalyst_3650-48tq-s
- catalyst_9300l-48t-4g-a
- 4431_integrated_services_router
- c9500-40x
- asr_1002-hx
- catalyst_3650-24pd-e
- catalyst_9300l-48t-4x-a
- 4321_integrated_services_router
- catalyst_9300l-24p-4g-a
- catalyst_3850-24p-s
- catalyst_3850-24xu-e
- c9500-24y4c
- catalyst_3850-24xs-s
- catalyst_3650-8x24pd-s
- catalyst_3650-24pd-s
- catalyst_3650-48td-s
- 8800_8-slot
- asr_1001-hx_r
- catalyst_3850-48xs-f-e
- catalyst_9400
- catalyst_3650-48pd-e
- catalyst_3650-24td-e
- catalyst_9800-l
- 1160_integrated_services_router
- catalyst_9300-48un-a
- catalyst_3650-12x48fd-e
- catalyst_3650-8x24uq-l
- catalyst_3850-48u-e
- c9500-32c
- 1000_integrated_services_router
- 4221_integrated_services_router
- catalyst_9300l-24p-4g-e
- catalyst_3650-48fq-e
- catalyst_9300-24p-e
- catalyst_3650-48fd-s
- catalyst_ie3400_heavy_duty_switch
- catalyst_3850-24u-l
- catalyst_9300-24p-a
- catalyst_3850
- asr_1023
- catalyst_3650-24ps-l
- 1100-4p_integrated_services_router
- ess-3300-con-e
- catalyst_3650-48tq-e
- catalyst_3650-12x48uq-e
- asr_1002-x_r
- catalyst_3650-48ts-s
- catalyst_9400_supervisor_engine-1
- catalyst_3650-48pq-e
- catalyst_3650-48pd-s
- catalyst_3850-48f-s
- 111x_integrated_services_router
- 8818
- asr_1001-x_r
- c8200l-1n-4t
- catalyst_3650-12x48uz-l
- catalyst_3650-12x48uz-s
- catalyst_3650-48fs-e
- catalyst_3650-48ps-l
- catalyst_3850-24xu-s
- catalyst_8540csr
- catalyst_9300l-48p-4x-a
- catalyst_3850-12x48u
- catalyst_8300-2n2s-4t2x
- catalyst_3650-24ts-e
- catalyst_8500
- ess-3300-con-a
- catalyst_3650-8x24uq
- ess-3300-ncp-e
- catalyst_3650-48td-e
- catalyst_3850-48p-l
- catalyst_9600_supervisor_engine-1
- catalyst_9300-24s-a
- catalyst_9800-80
- 1120_integrated_services_router
- isrv
- 1109_integrated_services_router
- catalyst_3650-12x48ur-l
- asr_1001
- catalyst_8300-1n1s-6t
- catalyst_3650-12x48ur-s
- catalyst_9300-48uxm-a
- 1111x_integrated_services_router
- catalyst_3850-24t-l
- catalyst_3850-24u-s
- catalyst_9300-48t-e
- catalyst_9300l-24t-4x-e
- 8800_12-slot
- asr_1002-x
- catalyst_9300-48s-a
- catalyst_9600
- catalyst_9800-l-f
- cbr-8
- catalyst_3650-12x48uz-e
- catalyst_3650-24td-s
- catalyst_9300
- catalyst_3850-24p-l
- catalyst_3650-48fqm
- catalyst_3850-12s-e
- catalyst_cg418-e
- catalyst_3850-12xs-s
- c9500-32qc
- catalyst_9300-48p-a
- catalyst_3650-8x24uq-e
- asr_1001-x
- catalyst_3650-8x24uq-s
- catalyst_3650-12x48fd-s
- catalyst_3650-48fd-l
- catalyst_3650-48tq-l
- catalyst_3850-24xu-l
- ess-3300-ncp-a
- asr_1006-x
- catalyst_3650-48fs-s
- 8800_4-slot
- 4351_integrated_services_router
- 4451-x_integrated_services_router
- asr_1002_fixed_router
- asr_1001-hx
- c9500-12q
- catalyst_9300-48s-e
- catalyst_3850-24p-e
- catalyst_3650-48pq-l
- 4331_integrated_services_router
- 8800_18-slot
- catalyst_3850-24xs-e
- catalyst_3850-24u-e
- ios
- 4451_integrated_services_router
- catalyst_3650-48td-l
- catalyst_9800
- asr_1006
- 4461_integrated_services_router
- catalyst_3650-24td-l
- catalyst_ess9300
- catalyst_3850-24u
- catalyst_3650-12x48uq-s
- catalyst_9300-48un-e
- catalyst_3650-48ts-e
- catalyst_3850-nm-2-40g
- catalyst_3850-48p-s
- asr_1000_series_route_processor_\(rp2\)
- catalyst_9800-80_wireless_controller
- 8808
- catalyst_9300l-48p-4x-e
- catalyst_3650-48fs-l
- catalyst_3850-24xu
- catalyst_3850-48xs-e
- catalyst_3650-24pdm-s
- catalyst_8510msr
- catalyst_9300l
- catalyst_8300-1n1s-4t2x
- catalyst_9800-40
- catalyst_3850-48p-e
- catalyst_3850-24pw-s
- c8200-1n-4t
- asr_1004
- 1101-4p_integrated_services_router
- catalyst_3650-48pd-l
- catalyst_3650-12x48uq-l
- catalyst_3850-12s-s
- catalyst_cg522-e
- asr_1002
- catalyst_9300-48uxm-e
- catalyst_9300l-24p-4x-a
- catalyst_9500
- catalyst_9300l-24t-4g-a
- catalyst_3650-12x48ur-e
- catalyst_3850-48xs-s
- catalyst_3650-48ps-s
- catalyst_9200
- catalyst_9300-48u-a
- catalyst_9300-48u-e
- catalyst_ie3200_rugged_switch
- catalyst_3850-48u-s
- catalyst_9800-l-c
- 8804
- catalyst_3850-24xs
- catalyst_3850-48u-l
- catalyst_8300-2n2s-6t
- catalyst_3650-24ts-s
- 1101_integrated_services_router
- asr_1000
- catalyst_3850-nm-8-10g
- catalyst_9300-48t-a
- catalyst_3650-48fd-e
- catalyst_3850-48t-l
- c9500-16x
- catalyst_8510csr
- catalyst_3850-48f-e
- ess-3300-24t-ncp-e
- asr_1009-x
- catalyst_3650-24pdm-l
- catalyst_3850-48xs-f-s
- catalyst_9300-24ux-a
- catalyst_9300-24u-e
- asr_1000-x
- catalyst_3850-12xs-e
- 1100-4g\/6g_integrated_services_router
- asr_1000-esp100
- catalyst_3650-12x48uz
- ios_xe
- catalyst_3650-24pd-l
- catalyst_3650-48fq-l
- catalyst_3850-24t-e
- catalyst_3850-48pw-s
- esr6300
- c9500-24q
- catalyst_3650-48fqm-l
- c9500-48y4c
- catalyst_3650-48fq
- catalyst_9300l-48t-4g-e
- 1100-8p_integrated_services_router
- 1111x-8p_integrated_services_router
- catalyst_9300l-48t-4x-e
- catalyst_ie3300_rugged_switch
- catalyst_9300-24t-e
- catalyst_9300-24ux-e
- catalyst_3650-24pdm-e
- asr_1002-hx_r
- catalyst_3850-48u
- catalyst_3850-48xs
- catalyst_3650-8x24pd-l
- catalyst_9300l-24t-4g-e
- catalyst_3650-48ps-e
- catalyst_3850-16xs-s
- catalyst_8500l
- catalyst_3850-24s-e
- catalyst_3650-48fqm-e
- catalyst_3850-48t-s
- catalyst_ie3400_rugged_switch
- catalyst_3850-48f-l
- 1109-4p_integrated_services_router
- catalyst_3650-48pq-s
- catalyst_3650-48fq-s
- catalyst_3650-24ts-l
- csr_1000v
- catalyst_9800-40_wireless_controller
- asr_1013
- 1100_integrated_services_router
- catalyst_3650-12x48ur
- catalyst_3850-32xs-e
- catalyst_3850-48t-e
- catalyst_3850-24s-s
- catalyst_3650-24ps-e
- catalyst_9300l_stack
- catalyst_3850-24t-s
- catalyst_3650-24ps-s