CVE-2021-34714
Summary
| CVE | CVE-2021-34714 |
|---|---|
| State | PUBLIC |
| Assigner | [email protected] |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2021-09-23 03:15:00 UTC |
| Updated | 2023-11-07 03:36:00 UTC |
| Description | 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. |
Risk And Classification
Problem Types: CWE-20
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Hardware | Cisco | Firepower 4100 | - | All | All | All |
| Hardware | Cisco | Firepower 4110 | - | All | All | All |
| Hardware | Cisco | Firepower 4112 | - | All | All | All |
| Hardware | Cisco | Firepower 4115 | - | All | All | All |
| Hardware | Cisco | Firepower 4120 | - | All | All | All |
| Hardware | Cisco | Firepower 4125 | - | All | All | All |
| Hardware | Cisco | Firepower 4140 | - | All | All | All |
| Hardware | Cisco | Firepower 4145 | - | All | All | All |
| Hardware | Cisco | Firepower 4150 | - | All | All | All |
| Hardware | Cisco | Firepower 9300 | - | All | All | All |
| Hardware | Cisco | Firepower 9300 Sm-24 | - | All | All | All |
| Hardware | Cisco | Firepower 9300 Sm-36 | - | All | All | All |
| Hardware | Cisco | Firepower 9300 Sm-40 | - | All | All | All |
| Hardware | Cisco | Firepower 9300 Sm-44 | - | All | All | All |
| Hardware | Cisco | Firepower 9300 Sm-44 X 3 | - | All | All | All |
| Hardware | Cisco | Firepower 9300 Sm-48 | - | All | All | All |
| Hardware | Cisco | Firepower 9300 Sm-56 | - | All | All | All |
| Hardware | Cisco | Firepower 9300 Sm-56 X 3 | - | All | All | All |
| Hardware | Cisco | Firepower 9300 With 1 Sm-24 Module | - | All | All | All |
| Hardware | Cisco | Firepower 9300 With 1 Sm-36 Module | - | All | All | All |
| Hardware | Cisco | Firepower 9300 With 1 Sm-44 Module | - | All | All | All |
| Hardware | Cisco | Firepower 9300 With 3 Sm-44 Module | - | All | All | All |
| Operating System | Cisco | Firepower Extensible Operating System | All | All | All | All |
| Operating System | Cisco | Firepower Extensible Operating System | All | All | All | All |
| Operating System | Cisco | Firepower Extensible Operating System | All | All | All | All |
| Operating System | Cisco | Firepower Extensible Operating System | All | All | All | All |
| Operating System | Cisco | Firepower Extensible Operating System | All | All | All | All |
| Operating System | Cisco | Fx-os | All | All | All | All |
| Operating System | Cisco | Fx-os | All | All | All | All |
| Operating System | Cisco | Fx-os | All | All | All | All |
| Operating System | Cisco | Fx-os | All | All | All | All |
| Operating System | Cisco | Fx-os | All | All | All | All |
| Operating System | Cisco | Fxos | All | All | All | All |
| Operating System | Cisco | Ios | All | All | All | All |
| Operating System | Cisco | Ios | All | All | All | All |
| Operating System | Cisco | Ios | All | All | All | All |
| Operating System | Cisco | Ios | All | All | All | All |
| Operating System | Cisco | Ios | All | All | All | All |
| Application | Cisco | Ios Xe | All | All | All | All |
| Operating System | Cisco | Ios Xe | All | All | All | All |
| Application | Cisco | Ios Xe | All | All | All | All |
| Operating System | Cisco | Ios Xe | All | All | All | All |
| Application | Cisco | Ios Xe | All | All | All | All |
| Operating System | Cisco | Ios Xe | All | All | All | All |
| Application | Cisco | Ios Xe | All | All | All | All |
| Operating System | Cisco | Ios Xe | All | All | All | All |
| Application | Cisco | Ios Xe | All | All | All | All |
| Operating System | Cisco | Ios Xe | All | All | All | All |
| Operating System | Cisco | Ios Xr | All | All | All | All |
| Operating System | Cisco | Ios Xr | All | All | All | All |
| Operating System | Cisco | Ios Xr | All | All | All | All |
| Operating System | Cisco | Ios Xr | All | All | All | All |
| Operating System | Cisco | Ios Xr | All | All | All | All |
| Hardware | Cisco | Mds 9000 | - | All | All | All |
| Hardware | Cisco | Mds 9100 | - | All | All | All |
| Hardware | Cisco | Mds 9132t | - | All | All | All |
| Hardware | Cisco | Mds 9134 | - | All | All | All |
| Hardware | Cisco | Mds 9140 | - | All | All | All |
| Hardware | Cisco | Mds 9148 | - | All | All | All |
| Hardware | Cisco | Mds 9148s | - | All | All | All |
| Hardware | Cisco | Mds 9148t | - | All | All | All |
| Hardware | Cisco | Mds 9200 | - | All | All | All |
| Hardware | Cisco | Mds 9216 | - | All | All | All |
| Hardware | Cisco | Mds 9216a | - | All | All | All |
| Hardware | Cisco | Mds 9216i | - | All | All | All |
| Hardware | Cisco | Mds 9222i | - | All | All | All |
| Hardware | Cisco | Mds 9250i | - | All | All | All |
| Hardware | Cisco | Mds 9396s | - | All | All | All |
| Hardware | Cisco | Mds 9396t | - | All | All | All |
| Hardware | Cisco | Mds 9500 | - | All | All | All |
| Hardware | Cisco | Mds 9506 | - | All | All | All |
| Hardware | Cisco | Mds 9509 | - | All | All | All |
| Hardware | Cisco | Mds 9513 | - | All | All | All |
| Hardware | Cisco | Mds 9700 | - | All | All | All |
| Hardware | Cisco | Mds 9706 | - | All | All | All |
| Hardware | Cisco | Mds 9710 | - | All | All | All |
| Hardware | Cisco | Mds 9718 | - | All | All | All |
| Hardware | Cisco | Nexus 3000 | - | All | All | All |
| Hardware | Cisco | Nexus 3016 | - | All | All | All |
| Hardware | Cisco | Nexus 3016q | - | All | All | All |
| Hardware | Cisco | Nexus 3048 | - | All | All | All |
| Hardware | Cisco | Nexus 3064 | - | All | All | All |
| Hardware | Cisco | Nexus 3064-32t | - | All | All | All |
| Hardware | Cisco | Nexus 3064-t | - | All | All | All |
| Hardware | Cisco | Nexus 3064-x | - | All | All | All |
| Hardware | Cisco | Nexus 3064t | - | All | All | All |
| Hardware | Cisco | Nexus 3064x | - | All | All | All |
| Hardware | Cisco | Nexus 3100 | - | All | All | All |
| Hardware | Cisco | Nexus 3100-v | - | All | All | All |
| Hardware | Cisco | Nexus 3100-z | - | All | All | All |
| Hardware | Cisco | Nexus 3100v | - | All | All | All |
| Hardware | Cisco | Nexus 31108pc-v | - | All | All | All |
| Hardware | Cisco | Nexus 31108pv-v | - | All | All | All |
| Hardware | Cisco | Nexus 31108tc-v | - | All | All | All |
| Hardware | Cisco | Nexus 31128pq | - | All | All | All |
| Hardware | Cisco | Nexus 3132c-z | - | All | All | All |
| Hardware | Cisco | Nexus 3132q | - | All | All | All |
| Hardware | Cisco | Nexus 3132q-v | - | All | All | All |
| Hardware | Cisco | Nexus 3132q-x | - | All | All | All |
| Hardware | Cisco | Nexus 3132q-xl | - | All | All | All |
| Hardware | Cisco | Nexus 3132q-x/3132q-xl | - | All | All | All |
| Hardware | Cisco | Nexus 3164q | - | All | All | All |
| Hardware | Cisco | Nexus 3172 | - | All | All | All |
| Hardware | Cisco | Nexus 3172pq | - | All | All | All |
| Hardware | Cisco | Nexus 3172pq-xl | - | All | All | All |
| Hardware | Cisco | Nexus 3172pq/pq-xl | - | All | All | All |
| Hardware | Cisco | Nexus 3172tq | - | All | All | All |
| Hardware | Cisco | Nexus 3172tq-32t | - | All | All | All |
| Hardware | Cisco | Nexus 3172tq-xl | - | All | All | All |
| Hardware | Cisco | Nexus 3200 | - | All | All | All |
| Hardware | Cisco | Nexus 3232c | - | All | All | All |
| Hardware | Cisco | Nexus 3232c | - | All | All | All |
| Hardware | Cisco | Nexus 3264c-e | - | All | All | All |
| Hardware | Cisco | Nexus 3264q | - | All | All | All |
| Hardware | Cisco | Nexus 3400 | - | All | All | All |
| Hardware | Cisco | Nexus 3408-s | - | All | All | All |
| Hardware | Cisco | Nexus 34180yc | - | All | All | All |
| Hardware | Cisco | Nexus 34200yc-sm | - | All | All | All |
| Hardware | Cisco | Nexus 3432d-s | - | All | All | All |
| Hardware | Cisco | Nexus 3464c | - | All | All | All |
| Hardware | Cisco | Nexus 3500 | - | All | All | All |
| Hardware | Cisco | Nexus 3500 Platform | - | All | All | All |
| Hardware | Cisco | Nexus 3524 | - | All | All | All |
| Hardware | Cisco | Nexus 3524-x | - | All | All | All |
| Hardware | Cisco | Nexus 3524-xl | - | All | All | All |
| Hardware | Cisco | Nexus 3524-x/xl | - | All | All | All |
| Hardware | Cisco | Nexus 3548 | - | All | All | All |
| Hardware | Cisco | Nexus 3548-x | - | All | All | All |
| Hardware | Cisco | Nexus 3548-xl | - | All | All | All |
| Hardware | Cisco | Nexus 3548-x/xl | - | All | All | All |
| Hardware | Cisco | Nexus 3600 | - | All | All | All |
| Hardware | Cisco | Nexus 36180yc-r | - | All | All | All |
| Hardware | Cisco | Nexus 3636c-r | - | All | All | All |
| Hardware | Cisco | Nexus 5000 | - | All | All | All |
| Hardware | Cisco | Nexus 5010 | - | All | All | All |
| Hardware | Cisco | Nexus 5020 | - | All | All | All |
| Hardware | Cisco | Nexus 5500 | - | All | All | All |
| Hardware | Cisco | Nexus 5548p | - | All | All | All |
| Hardware | Cisco | Nexus 5548up | - | All | All | All |
| Hardware | Cisco | Nexus 5596t | - | All | All | All |
| Hardware | Cisco | Nexus 5596up | - | All | All | All |
| Hardware | Cisco | Nexus 5600 | - | All | All | All |
| Hardware | Cisco | Nexus 56128p | - | All | All | All |
| Hardware | Cisco | Nexus 5624q | - | All | All | All |
| Hardware | Cisco | Nexus 5648q | - | All | All | All |
| Hardware | Cisco | Nexus 5672up | - | All | All | All |
| Hardware | Cisco | Nexus 5672up-16g | - | All | All | All |
| Hardware | Cisco | Nexus 5696q | - | All | All | All |
| Hardware | Cisco | Nexus 6000 | - | All | All | All |
| Hardware | Cisco | Nexus 6001 | - | All | All | All |
| Hardware | Cisco | Nexus 6001p | - | All | All | All |
| Hardware | Cisco | Nexus 6001t | - | All | All | All |
| Hardware | Cisco | Nexus 6004 | - | All | All | All |
| Hardware | Cisco | Nexus 6004x | - | All | All | All |
| Hardware | Cisco | Nexus 7000 | - | All | All | All |
| Hardware | Cisco | Nexus 7000 10-slot | - | All | All | All |
| Hardware | Cisco | Nexus 7000 18-slot | - | All | All | All |
| Hardware | Cisco | Nexus 7000 4-slot | - | All | All | All |
| Hardware | Cisco | Nexus 7000 9-slot | - | All | All | All |
| Hardware | Cisco | Nexus 7000 Supervisor 1 | - | All | All | All |
| Hardware | Cisco | Nexus 7000 Supervisor 2 | - | All | All | All |
| Hardware | Cisco | Nexus 7000 Supervisor 2e | - | All | All | All |
| Hardware | Cisco | Nexus 7004 | - | All | All | All |
| Hardware | Cisco | Nexus 7009 | - | All | All | All |
| Hardware | Cisco | Nexus 7010 | - | All | All | All |
| Hardware | Cisco | Nexus 7018 | - | All | All | All |
| Hardware | Cisco | Nexus 7700 | - | All | All | All |
| Hardware | Cisco | Nexus 7700 10-slot | - | All | All | All |
| Hardware | Cisco | Nexus 7700 18-slot | - | All | All | All |
| Hardware | Cisco | Nexus 7700 2-slot | - | All | All | All |
| Hardware | Cisco | Nexus 7700 6-slot | - | All | All | All |
| Hardware | Cisco | Nexus 7700 Supervisor 2e | - | All | All | All |
| Hardware | Cisco | Nexus 7700 Supervisor 3e | - | All | All | All |
| Hardware | Cisco | Nexus 7702 | - | All | All | All |
| Hardware | Cisco | Nexus 7706 | - | All | All | All |
| Hardware | Cisco | Nexus 7710 | - | All | All | All |
| Hardware | Cisco | Nexus 7718 | - | All | All | All |
| Hardware | Cisco | Nexus 9000 | - | All | All | All |
| Hardware | Cisco | Nexus 9000v | - | All | All | All |
| Hardware | Cisco | Nexus 9000 In Aci Mode | - | All | All | All |
| Hardware | Cisco | Nexus 9000 In Standalone | - | All | All | All |
| Hardware | Cisco | Nexus 9000 In Standalone Nx-os Mode | - | All | All | All |
| Hardware | Cisco | Nexus 9200 | - | All | All | All |
| Hardware | Cisco | Nexus 92160yc-x | - | All | All | All |
| Hardware | Cisco | Nexus 9221c | - | All | All | All |
| Hardware | Cisco | Nexus 92300yc | - | All | All | All |
| Hardware | Cisco | Nexus 92304qc | - | All | All | All |
| Hardware | Cisco | Nexus 92348gc-x | - | All | All | All |
| Hardware | Cisco | Nexus 9236c | - | All | All | All |
| Hardware | Cisco | Nexus 9272q | - | All | All | All |
| Hardware | Cisco | Nexus 9300 | - | All | All | All |
| Hardware | Cisco | Nexus 93108tc-ex | - | All | All | All |
| Hardware | Cisco | Nexus 93108tc-ex-24 | - | All | All | All |
| Hardware | Cisco | Nexus 93108tc-fx | - | All | All | All |
| Hardware | Cisco | Nexus 93108tc-fx-24 | - | All | All | All |
| Hardware | Cisco | Nexus 93108tc-fx3p | - | All | All | All |
| Hardware | Cisco | Nexus 93120tx | - | All | All | All |
| Hardware | Cisco | Nexus 93128 | - | All | All | All |
| Hardware | Cisco | Nexus 93128tx | - | All | All | All |
| Hardware | Cisco | Nexus 9316d-gx | - | All | All | All |
| Hardware | Cisco | Nexus 93180lc-ex | - | All | All | All |
| Hardware | Cisco | Nexus 93180tc-ex | - | All | All | All |
| Hardware | Cisco | Nexus 93180yc-ex | - | All | All | All |
| Hardware | Cisco | Nexus 93180yc-ex-24 | - | All | All | All |
| Hardware | Cisco | Nexus 93180yc-fx | - | All | All | All |
| Hardware | Cisco | Nexus 93180yc-fx-24 | - | All | All | All |
| Hardware | Cisco | Nexus 93180yc-fx3 | - | All | All | All |
| Hardware | Cisco | Nexus 93180yc-fx3s | - | All | All | All |
| Hardware | Cisco | Nexus 93216tc-fx2 | - | All | All | All |
| Hardware | Cisco | Nexus 93240yc-fx2 | - | All | All | All |
| Hardware | Cisco | Nexus 9332c | - | All | All | All |
| Hardware | Cisco | Nexus 9332pq | - | All | All | All |
| Hardware | Cisco | Nexus 93360yc-fx2 | - | All | All | All |
| Hardware | Cisco | Nexus 9336c-fx2 | - | All | All | All |
| Hardware | Cisco | Nexus 9336c-fx2-e | - | All | All | All |
| Hardware | Cisco | Nexus 9336pq | - | All | All | All |
| Hardware | Cisco | Nexus 9336pq Aci Spine | - | All | All | All |
| Hardware | Cisco | Nexus 9348gc-fxp | - | All | All | All |
| Hardware | Cisco | Nexus 93600cd-gx | - | All | All | All |
| Hardware | Cisco | Nexus 9364c | - | All | All | All |
| Hardware | Cisco | Nexus 9364c-gx | - | All | All | All |
| Hardware | Cisco | Nexus 9372px | - | All | All | All |
| Hardware | Cisco | Nexus 9372px-e | - | All | All | All |
| Hardware | Cisco | Nexus 9372tx | - | All | All | All |
| Hardware | Cisco | Nexus 9372tx-e | - | All | All | All |
| Hardware | Cisco | Nexus 9396px | - | All | All | All |
| Hardware | Cisco | Nexus 9396tx | - | All | All | All |
| Hardware | Cisco | Nexus 9500 | - | All | All | All |
| Hardware | Cisco | Nexus 9500r | - | All | All | All |
| Hardware | Cisco | Nexus 9500 Supervisor A | - | All | All | All |
| Hardware | Cisco | Nexus 9500 Supervisor A | - | All | All | All |
| Hardware | Cisco | Nexus 9500 Supervisor B | - | All | All | All |
| Hardware | Cisco | Nexus 9500 Supervisor B | - | All | All | All |
| Hardware | Cisco | Nexus 9504 | - | All | All | All |
| Hardware | Cisco | Nexus 9508 | - | All | All | All |
| Hardware | Cisco | Nexus 9516 | - | All | All | All |
| Operating System | Cisco | Nx-os | All | All | All | All |
| Operating System | Cisco | Nx-os | All | All | All | All |
| Operating System | Cisco | Nx-os | All | All | All | All |
| Operating System | Cisco | Nx-os | All | All | All | All |
| Hardware | Cisco | Ucs 6200 | - | All | All | All |
| Hardware | Cisco | Ucs 6248up | - | All | All | All |
| Hardware | Cisco | Ucs 6248 Up Fabric Interconnect | - | All | All | All |
| Hardware | Cisco | Ucs 6296up | - | All | All | All |
| Hardware | Cisco | Ucs 6296 Up Fabric Interconnect | - | All | All | All |
| Hardware | Cisco | Ucs 6300 | - | All | All | All |
| Hardware | Cisco | Ucs 6324 | - | All | All | All |
| Hardware | Cisco | Ucs 6324 Fabric Interconnect | - | All | All | All |
| Hardware | Cisco | Ucs 6332 | - | All | All | All |
| Hardware | Cisco | Ucs 6332-16up | - | All | All | All |
| Hardware | Cisco | Ucs 6332-16up Fabric Interconnect | - | All | All | All |
| Hardware | Cisco | Ucs 6332 Fabric Interconnect | - | All | All | All |
| Hardware | Cisco | Ucs 6400 | - | All | All | All |
| Hardware | Cisco | Ucs 6454 | - | All | All | All |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| Multiple Cisco Operating Systems Unidirectional Link Detection Denial of Service Vulnerability | CISCO | tools.cisco.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Legacy QID Mappings
- 317061 Cisco Internetwork Operating System (IOS) Unidirectional Link Detection Denial of Service (DoS) Vulnerability (cisco-sa-ios-nxos-xr-udld-dos-W5hGHgtQ)
- 317064 Cisco Nexus Operating System (NX-OS) Unidirectional Link Detection Denial of Service (DoS) Vulnerability (cisco-sa-ios-nxos-xr-udld-dos-W5hGHgtQ)
- 317065 Cisco Internetwork Operating System (IOS) XR Unidirectional Link Detection Denial of Service (DoS) Vulnerability (cisco-sa-ios-nxos-xr-udld-dos-W5hGHgtQ)
- 317066 Cisco Unified Computing System (UCS) Fabric Interconnect Unidirectional Link Detection Denial of Service (DoS) Vulnerability (cisco-sa-ios-nxos-xr-udld-dos-W5hGHgtQ)