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.
References
| Link | Resource |
|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-nxos-xr-udld-dos-W5hGHgtQ | Vendor Advisory |
Configurations
Configuration 1 (hide)
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Configuration 2 (hide)
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Configuration 3 (hide)
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Configuration 4 (hide)
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Configuration 5 (hide)
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Configuration 6 (hide)
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History
No history.
Information
Published : 2021-09-23 03:15
Updated : 2024-02-28 18:48
NVD link : CVE-2021-34714
Mitre link : CVE-2021-34714
CVE.ORG link : CVE-2021-34714
JSON object : View
Products Affected
cisco
- nexus_9348gc-fxp
- nexus_3064-x
- firepower_4110
- nexus_93180yc-ex-24
- nexus_3064-32t
- mds_9710
- nexus_9000_in_aci_mode
- mds_9148t
- nexus_3064-t
- nexus_93108tc-ex-24
- nexus_7000_supervisor_2e
- nexus_3548-x\/xl
- nexus_5010
- mds_9396t
- firepower_9300_sm-36
- nexus_3100-z
- nexus_9516
- nexus_9332c
- nexus_5548p
- nexus_5596t
- nexus_92160yc-x
- nexus_9336pq
- nexus_7700_18-slot
- nexus_3500
- nx-os
- mds_9216i
- ucs_6332
- nexus_3172
- mds_9132t
- nexus_93240yc-fx2
- nexus_3464c
- nexus_7000_10-slot
- nexus_9372px-e
- nexus_7700
- nexus_7710
- nexus_92300yc
- nexus_7000_9-slot
- nexus_7700_supervisor_2e
- nexus_3132q-x\/3132q-xl
- nexus_3432d-s
- nexus_9372px
- nexus_7706
- nexus_3100
- firepower_9300
- mds_9718
- mds_9513
- nexus_3172pq\/pq-xl
- nexus_5020
- ucs_6200
- firepower_9300_sm-44
- nexus_3200
- nexus_6001t
- nexus_7702
- nexus_34180yc
- nexus_7000_supervisor_2
- nexus_3548-x
- ucs_6454
- nexus_36180yc-r
- nexus_9504
- firepower_4140
- nexus_3264q
- mds_9200
- nexus_9372tx-e
- nexus_3132q-x
- mds_9250i
- firepower_9300_with_1_sm-44_module
- nexus_3000
- nexus_3524-x
- nexus_7700_10-slot
- mds_9396s
- nexus_3100-v
- nexus_31128pq
- nexus_3548-xl
- nexus_93108tc-fx-24
- nexus_93180yc-fx3
- nexus_93360yc-fx2
- nexus_9500_supervisor_b
- nexus_9396tx
- nexus_3636c-r
- ucs_6300
- nexus_9000v
- nexus_5548up
- nexus_7004
- nexus_3548
- nexus_9364c
- ucs_6296_up_fabric_interconnect
- nexus_7000_4-slot
- firepower_extensible_operating_system
- fxos
- nexus_34200yc-sm
- nexus_9508
- ucs_6296up
- nexus_6004
- firepower_9300_sm-48
- ucs_6248up
- nexus_7700_2-slot
- ucs_6400
- nexus_3172tq
- ucs_6324
- ucs_6332-16up
- ucs_6332_fabric_interconnect
- nexus_93120tx
- nexus_3600
- nexus_92348gc-x
- nexus_6000
- nexus_3064x
- nexus_92304qc
- nexus_3400
- firepower_9300_with_1_sm-36_module
- nexus_3132q-v
- nexus_5596up
- nexus_9336c-fx2
- mds_9222i
- nexus_93600cd-gx
- nexus_3100v
- nexus_9000
- mds_9100
- firepower_9300_with_1_sm-24_module
- nexus_5672up
- mds_9506
- nexus_7009
- mds_9148s
- nexus_9200
- nexus_7700_supervisor_3e
- nexus_7000
- firepower_4125
- firepower_9300_sm-44_x_3
- mds_9706
- nexus_3524-x\/xl
- ios_xr
- nexus_93216tc-fx2
- ios
- mds_9700
- nexus_93180yc-fx-24
- nexus_7018
- nexus_3264c-e
- firepower_4145
- nexus_93108tc-fx
- nexus_93180lc-ex
- nexus_9000_in_standalone
- nexus_3408-s
- nexus_31108pc-v
- nexus_7010
- nexus_7718
- nexus_9300
- nexus_93128
- nexus_93180yc-ex
- nexus_3132q
- nexus_6001p
- nexus_93108tc-fx3p
- nexus_5648q
- nexus_9221c
- nexus_9396px
- nexus_5672up-16g
- nexus_93128tx
- firepower_4115
- nexus_93108tc-ex
- nexus_3500_platform
- mds_9148
- nexus_6004x
- firepower_4150
- nexus_3016
- nexus_9236c
- nexus_7000_18-slot
- nexus_3232c
- nexus_3524-xl
- nexus_93180yc-fx3s
- nexus_56128p
- nexus_5696q
- nexus_9316d-gx
- nexus_7000_supervisor_1
- nexus_9500r
- nexus_3172pq-xl
- nexus_93180tc-ex
- nexus_5600
- nexus_3048
- nexus_93180yc-fx
- mds_9500
- firepower_4120
- nexus_31108tc-v
- nexus_3164q
- ucs_6248_up_fabric_interconnect
- nexus_3064t
- nexus_3524
- nexus_9336c-fx2-e
- nexus_3132q-xl
- nexus_3232c_
- nexus_5000
- firepower_9300_sm-40
- nexus_9000_in_standalone_nx-os_mode
- nexus_6001
- ucs_6332-16up_fabric_interconnect
- firepower_4100
- nexus_9500_supervisor_a\+
- mds_9216
- nexus_9500
- mds_9000
- ios_xe
- nexus_3016q
- nexus_3064
- firepower_9300_sm-24
- firepower_9300_sm-56_x_3
- firepower_9300_sm-56
- nexus_3132c-z
- nexus_9500_supervisor_a
- nexus_5624q
- mds_9509
- nexus_3172tq-32t
- firepower_4112
- mds_9140
- nexus_3172tq-xl
- nexus_5500
- mds_9134
- mds_9216a
- nexus_9364c-gx
- nexus_9372tx
- nexus_7700_6-slot
- nexus_3172pq
- nexus_9500_supervisor_b\+
- nexus_9332pq
- nexus_31108pv-v
- nexus_9336pq_aci_spine
- firepower_9300_with_3_sm-44_module
- nexus_9272q
- ucs_6324_fabric_interconnect
CWE
CWE-20
Improper Input Validation