Vulnerability-Lookup

BDU:2021-05131 (CVE-2021-34714)

Vulnerability from fstec – Published: 2021-10-27 – Updated: 2021-10-27 – View on bdu.fstec.ru Fixed

Title

Уязвимость функции Unidirectional Link Detection (UDLD) операционных систем NX-OS, FXOS, Cisco IOS XE, Cisco IOS XR, связанная с недостаточной проверкой вводимых данных, позволяющая нарушителю вызвать отказ в обслуживании

Summary

Уязвимость функции Unidirectional Link Detection (UDLD) операционных систем NX-OS, FXOS, Cisco IOS XE, Cisco IOS XR связана с недостаточной проверкой вводимых данных. Эксплуатация уязвимости может позволить нарушителю, действующему удалённо, вызвать отказ в обслуживании

Severity

6.1 (Medium) CVSS 2.0


                      
                        AV:A/AC:L/Au:N/C:N/I:N/A:C

7.4 (High) CVSS 3.0


                      
                        CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Class

Code vulnerability

Status

Confirmed by the vendor

Exploitation

Resource manipulation

Incidents

Being clarified

Remediation

Software update

CWE

CWE-20 - Недостаточная проверка вводимых данных

Aliases

CVE-2021-34714

References

1 reference

URL
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-…

Impacted products

5 products from 2 vendors

Vendors

Cisco Systems, Inc.

Products

Cisco IOS XR, FX-OS, Cisco IOS XE, Cisco IOS, NX-OS

Versions

от 7.3.0 до 7.3.1 (Cisco IOS XR), до 7.3.15 (Cisco IOS XR), от 6.7 до 6.7.4 (Cisco IOS XR), от 7.0 до 7.2.2 (Cisco IOS XR), от 2.2 до 2.2.2.148 (FX-OS), от 2.3 до 2.3.1.216 (FX-OS), от 2.4 до 2.4.1.273 (FX-OS), от 2.6 до 2.6.1.224 (FX-OS), от 2.7 до 2.7.1.143 (FX-OS), от 2.8 до 2.8.1.143 (FX-OS), от 2.9 до 2.9.1.135 (FX-OS), от 6.8 до 6.8.1 (Cisco IOS XR), от 7.4 до 7.4.1 (Cisco IOS XR), до 8.4 (3.115) (Cisco IOS XE), до 8.4 (3.115) включительно (Cisco IOS), до 8.4 (3.115) включительно (Cisco IOS XR), до 8.4 (3.115) включительно (NX-OS), до 7.0(3)i7(9) включительно (Cisco IOS XE), до 7.0(3)i7(9) включительно (Cisco IOS), до 7.0(3)i7(9) включительно (Cisco IOS XR), до 7.0(3)i7(9) включительно (NX-OS), до 7.3(8)n1(1) включительно (Cisco IOS XE), до 7.3(8)n1(1) включительно (Cisco IOS), до 7.3(8)n1(1) включительно (Cisco IOS XR), до 7.3(8)n1(1) включительно (NX-OS), до 3.2(3o)a включительно (Cisco IOS XE), до 3.2(3o)a включительно (Cisco IOS), до 3.2(3o)a включительно (Cisco IOS XR), до 3.2(3o)a включительно (NX-OS), до 4.1(1a)a включительно (Cisco IOS XE), до 4.1(1a)a включительно (Cisco IOS), до 4.1(1a)a включительно (Cisco IOS XR), до 4.1(1a)a включительно (NX-OS)

Product types

Operating system, Network appliance software

Platforms

Cisco Systems, Inc. Cisco IOS XR от 7.3.0 до 7.3.1, Inc. Cisco IOS XR до 7.3.15, Inc. Cisco IOS XR от 6.7 до 6.7.4, Inc. Cisco IOS XR от 7.0 до 7.2.2, Inc. FX-OS от 2.2 до 2.2.2.148 Cisco Firepower 4100, Inc. FX-OS от 2.2 до 2.2.2.148 Firepower 9300 Security Appliances, Inc. FX-OS от 2.3 до 2.3.1.216 Cisco Firepower 4100, Inc. FX-OS от 2.3 до 2.3.1.216 Firepower 9300 Series Security Appliances, Inc. FX-OS от 2.4 до 2.4.1.273 Cisco Firepower 4100, Inc. FX-OS от 2.4 до 2.4.1.273 Firepower 9300 Security Appliances, Inc. FX-OS от 2.6 до 2.6.1.224 Cisco Firepower 4100, Inc. FX-OS от 2.6 до 2.6.1.224 Firepower 9300 Security Appliances, Inc. FX-OS от 2.7 до 2.7.1.143 Cisco Firepower 4100, Inc. FX-OS от 2.7 до 2.7.1.143 Firepower 9300 Security Appliances, Inc. FX-OS от 2.8 до 2.8.1.143 Cisco Firepower 4100, Inc. FX-OS от 2.8 до 2.8.1.143 Firepower 9300 Series Security Appliances, Inc. FX-OS от 2.9 до 2.9.1.135 Cisco Firepower 4100, Inc. FX-OS от 2.9 до 2.9.1.135 Firepower 9300 Series Security Appliances, Inc. Cisco IOS XR от 6.8 до 6.8.1, Inc. Cisco IOS XR от 7.4 до 7.4.1, Inc. Cisco IOS XE до 8.4 (3.115), Inc. Cisco IOS до 8.4 (3.115) включительно, Inc. Cisco IOS XR до 8.4 (3.115) включительно, Inc. NX-OS до 8.4 (3.115) включительно, Inc. Cisco IOS XE до 7.0(3)i7(9) включительно, Inc. Cisco IOS до 7.0(3)i7(9) включительно, Inc. Cisco IOS XR до 7.0(3)i7(9) включительно, Inc. NX-OS до 7.0(3)i7(9) включительно, Inc. Cisco IOS XE до 7.3(8)n1(1) включительно, Inc. Cisco IOS до 7.3(8)n1(1) включительно, Inc. Cisco IOS XR до 7.3(8)n1(1) включительно, Inc. NX-OS до 7.3(8)n1(1) включительно, Inc. Cisco IOS XE до 3.2(3o)a включительно, Inc. Cisco IOS до 3.2(3o)a включительно, Inc. Cisco IOS XR до 3.2(3o)a включительно, Inc. NX-OS до 3.2(3o)a включительно, Inc. Cisco IOS XE до 4.1(1a)a включительно, Inc. Cisco IOS до 4.1(1a)a включительно, Inc. Cisco IOS XR до 4.1(1a)a включительно, Inc. NX-OS до 4.1(1a)a включительно

Mitigations

Использование рекомендаций: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-nxos-xr-udld-dos-W5hGHgtQ

JSON

To clipboard

{
  "CVSS 2.0": "AV:A/AC:L/Au:N/C:N/I:N/A:C",
  "CVSS 3.0": "AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
  "CVSS 4.0": null,
  "remediation_\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": null,
  "remediation_\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435": null,
  "\u0412\u0435\u043d\u0434\u043e\u0440 \u041f\u041e": "Cisco Systems, Inc.",
  "\u0412\u0435\u0440\u0441\u0438\u044f \u041f\u041e": "\u043e\u0442 7.3.0 \u0434\u043e 7.3.1 (Cisco IOS XR), \u0434\u043e 7.3.15 (Cisco IOS XR), \u043e\u0442 6.7 \u0434\u043e 6.7.4 (Cisco IOS XR), \u043e\u0442 7.0 \u0434\u043e 7.2.2 (Cisco IOS XR), \u043e\u0442 2.2 \u0434\u043e 2.2.2.148 (FX-OS), \u043e\u0442 2.3 \u0434\u043e 2.3.1.216 (FX-OS), \u043e\u0442 2.4 \u0434\u043e 2.4.1.273 (FX-OS), \u043e\u0442 2.6 \u0434\u043e 2.6.1.224 (FX-OS), \u043e\u0442 2.7 \u0434\u043e 2.7.1.143 (FX-OS), \u043e\u0442 2.8 \u0434\u043e 2.8.1.143 (FX-OS), \u043e\u0442 2.9 \u0434\u043e 2.9.1.135 (FX-OS), \u043e\u0442 6.8 \u0434\u043e 6.8.1 (Cisco IOS XR), \u043e\u0442 7.4 \u0434\u043e 7.4.1 (Cisco IOS XR), \u0434\u043e 8.4 (3.115) (Cisco IOS XE), \u0434\u043e 8.4 (3.115) \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Cisco IOS), \u0434\u043e 8.4 (3.115) \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Cisco IOS XR), \u0434\u043e 8.4 (3.115) \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (NX-OS), \u0434\u043e 7.0(3)i7(9) \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Cisco IOS XE), \u0434\u043e 7.0(3)i7(9) \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Cisco IOS), \u0434\u043e 7.0(3)i7(9) \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Cisco IOS XR), \u0434\u043e 7.0(3)i7(9) \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (NX-OS), \u0434\u043e 7.3(8)n1(1) \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Cisco IOS XE), \u0434\u043e 7.3(8)n1(1) \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Cisco IOS), \u0434\u043e 7.3(8)n1(1) \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Cisco IOS XR), \u0434\u043e 7.3(8)n1(1) \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (NX-OS), \u0434\u043e 3.2(3o)a \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Cisco IOS XE), \u0434\u043e 3.2(3o)a \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Cisco IOS), \u0434\u043e 3.2(3o)a \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Cisco IOS XR), \u0434\u043e 3.2(3o)a \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (NX-OS), \u0434\u043e 4.1(1a)a \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Cisco IOS XE), \u0434\u043e 4.1(1a)a \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Cisco IOS), \u0434\u043e 4.1(1a)a \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Cisco IOS XR), \u0434\u043e 4.1(1a)a \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (NX-OS)",
  "\u0412\u043e\u0437\u043c\u043e\u0436\u043d\u044b\u0435 \u043c\u0435\u0440\u044b \u043f\u043e \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044e": "\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0439:\nhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-nxos-xr-udld-dos-W5hGHgtQ",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "22.09.2021",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "27.10.2021",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "27.10.2021",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2021-05131",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u044b \u0434\u0440\u0443\u0433\u0438\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "CVE-2021-34714",
  "\u0418\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430",
  "\u041a\u043b\u0430\u0441\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043a\u043e\u0434\u0430",
  "\u041d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 \u041f\u041e": "Cisco IOS XR, FX-OS, Cisco IOS XE, Cisco IOS, NX-OS",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u041e\u0421 \u0438 \u0442\u0438\u043f \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b": "Cisco Systems, Inc. Cisco IOS XR \u043e\u0442 7.3.0 \u0434\u043e 7.3.1 , Cisco Systems, Inc. Cisco IOS XR \u0434\u043e 7.3.15 , Cisco Systems, Inc. Cisco IOS XR \u043e\u0442 6.7 \u0434\u043e 6.7.4 , Cisco Systems, Inc. Cisco IOS XR \u043e\u0442 7.0 \u0434\u043e 7.2.2 , Cisco Systems, Inc. FX-OS \u043e\u0442 2.2 \u0434\u043e 2.2.2.148 Cisco Firepower 4100, Cisco Systems, Inc. FX-OS \u043e\u0442 2.2 \u0434\u043e 2.2.2.148 Firepower 9300 Security Appliances, Cisco Systems, Inc. FX-OS \u043e\u0442 2.3 \u0434\u043e 2.3.1.216 Cisco Firepower 4100, Cisco Systems, Inc. FX-OS \u043e\u0442 2.3 \u0434\u043e 2.3.1.216 Firepower 9300 Series Security Appliances, Cisco Systems, Inc. FX-OS \u043e\u0442 2.4 \u0434\u043e 2.4.1.273 Cisco Firepower 4100, Cisco Systems, Inc. FX-OS \u043e\u0442 2.4 \u0434\u043e 2.4.1.273 Firepower 9300 Security Appliances, Cisco Systems, Inc. FX-OS \u043e\u0442 2.6 \u0434\u043e 2.6.1.224 Cisco Firepower 4100, Cisco Systems, Inc. FX-OS \u043e\u0442 2.6 \u0434\u043e 2.6.1.224 Firepower 9300 Security Appliances, Cisco Systems, Inc. FX-OS \u043e\u0442 2.7 \u0434\u043e 2.7.1.143 Cisco Firepower 4100, Cisco Systems, Inc. FX-OS \u043e\u0442 2.7 \u0434\u043e 2.7.1.143 Firepower 9300 Security Appliances, Cisco Systems, Inc. FX-OS \u043e\u0442 2.8 \u0434\u043e 2.8.1.143 Cisco Firepower 4100, Cisco Systems, Inc. FX-OS \u043e\u0442 2.8 \u0434\u043e 2.8.1.143 Firepower 9300 Series Security Appliances, Cisco Systems, Inc. FX-OS \u043e\u0442 2.9 \u0434\u043e 2.9.1.135 Cisco Firepower 4100, Cisco Systems, Inc. FX-OS \u043e\u0442 2.9 \u0434\u043e 2.9.1.135 Firepower 9300 Series Security Appliances, Cisco Systems, Inc. Cisco IOS XR \u043e\u0442 6.8 \u0434\u043e 6.8.1 , Cisco Systems, Inc. Cisco IOS XR \u043e\u0442 7.4 \u0434\u043e 7.4.1 , Cisco Systems, Inc. Cisco IOS XE \u0434\u043e 8.4 (3.115) , Cisco Systems, Inc. Cisco IOS \u0434\u043e 8.4 (3.115) \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , Cisco Systems, Inc. Cisco IOS XR \u0434\u043e 8.4 (3.115) \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , Cisco Systems, Inc. NX-OS \u0434\u043e 8.4 (3.115) \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , Cisco Systems, Inc. Cisco IOS XE \u0434\u043e 7.0(3)i7(9) \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , Cisco Systems, Inc. Cisco IOS \u0434\u043e 7.0(3)i7(9) \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , Cisco Systems, Inc. Cisco IOS XR \u0434\u043e 7.0(3)i7(9) \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , Cisco Systems, Inc. NX-OS \u0434\u043e 7.0(3)i7(9) \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , Cisco Systems, Inc. Cisco IOS XE \u0434\u043e 7.3(8)n1(1) \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , Cisco Systems, Inc. Cisco IOS \u0434\u043e 7.3(8)n1(1) \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , Cisco Systems, Inc. Cisco IOS XR \u0434\u043e 7.3(8)n1(1) \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , Cisco Systems, Inc. NX-OS \u0434\u043e 7.3(8)n1(1) \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , Cisco Systems, Inc. Cisco IOS XE \u0434\u043e 3.2(3o)a \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , Cisco Systems, Inc. Cisco IOS \u0434\u043e 3.2(3o)a \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , Cisco Systems, Inc. Cisco IOS XR \u0434\u043e 3.2(3o)a \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , Cisco Systems, Inc. NX-OS \u0434\u043e 3.2(3o)a \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , Cisco Systems, Inc. Cisco IOS XE \u0434\u043e 4.1(1a)a \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , Cisco Systems, Inc. Cisco IOS \u0434\u043e 4.1(1a)a \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , Cisco Systems, Inc. Cisco IOS XR \u0434\u043e 4.1(1a)a \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , Cisco Systems, Inc. NX-OS \u0434\u043e 4.1(1a)a \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e ",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0444\u0443\u043d\u043a\u0446\u0438\u0438 Unidirectional Link Detection (UDLD) \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c NX-OS, FXOS, Cisco IOS XE, Cisco IOS XR, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u0430\u044f \u0441 \u043d\u0435\u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e\u0439 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u043e\u0439 \u0432\u0432\u043e\u0434\u0438\u043c\u044b\u0445 \u0434\u0430\u043d\u043d\u044b\u0445, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043e\u0442\u043a\u0430\u0437 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0438",
  "\u041d\u0430\u043b\u0438\u0447\u0438\u0435 \u044d\u043a\u0441\u043f\u043b\u043e\u0439\u0442\u0430": "\u0414\u0430\u043d\u043d\u044b\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u044e\u0442\u0441\u044f",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "\u041d\u0435\u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u0430\u044f \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0430 \u0432\u0432\u043e\u0434\u0438\u043c\u044b\u0445 \u0434\u0430\u043d\u043d\u044b\u0445 (CWE-20)",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0444\u0443\u043d\u043a\u0446\u0438\u0438 Unidirectional Link Detection (UDLD) \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c NX-OS, FXOS, Cisco IOS XE, Cisco IOS XR \u0441\u0432\u044f\u0437\u0430\u043d\u0430 \u0441 \u043d\u0435\u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e\u0439 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u043e\u0439 \u0432\u0432\u043e\u0434\u0438\u043c\u044b\u0445 \u0434\u0430\u043d\u043d\u044b\u0445. \u042d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043c\u043e\u0436\u0435\u0442 \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442\u044c \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e, \u0434\u0435\u0439\u0441\u0442\u0432\u0443\u044e\u0449\u0435\u043c\u0443 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e, \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043e\u0442\u043a\u0430\u0437 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0438",
  "\u041f\u043e\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": null,
  "\u041f\u0440\u043e\u0447\u0430\u044f \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f": null,
  "\u0421\u0432\u044f\u0437\u044c \u0441 \u0438\u043d\u0446\u0438\u0434\u0435\u043d\u0442\u0430\u043c\u0438 \u0418\u0411": "\u0414\u0430\u043d\u043d\u044b\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u044e\u0442\u0441\u044f",
  "\u0421\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f": "\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438": "\u041c\u0430\u043d\u0438\u043f\u0443\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u0441\u0443\u0440\u0441\u0430\u043c\u0438",
  "\u0421\u0441\u044b\u043b\u043a\u0438 \u043d\u0430 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0438": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-nxos-xr-udld-dos-W5hGHgtQ",
  "\u0421\u0442\u0430\u0442\u0443\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u0435\u043c",
  "\u0422\u0438\u043f \u041f\u041e": "\u041e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u0430\u044f \u0441\u0438\u0441\u0442\u0435\u043c\u0430, \u041f\u041e \u0441\u0435\u0442\u0435\u0432\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e-\u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0433\u043e \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0430",
  "\u0422\u0438\u043f \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "CWE-20",
  "\u0423\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0421\u0440\u0435\u0434\u043d\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 2.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 6,1)\n\u0412\u044b\u0441\u043e\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 3.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 7,4)"
}

CVE-2021-34714 (GCVE-0-2021-34714)

Vulnerability from cvelistv5 – Published: 2021-09-23 02:25 – Updated: 2024-11-07 21:59

Title

Multiple Cisco Operating Systems Unidirectional Link Detection Denial of Service Vulnerability

Summary

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.

Severity

7.4 (High)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-11-07 21:40 UTC

CWE

CWE-20

Assigner

cisco mitre root Scorecard

References

1 reference

URL	Tags
https://tools.cisco.com/security/center/content/C…	vendor-advisoryx_refsource_CISCO

Impacted products

1 product

Vendor	Product	Version
Cisco	Cisco IOS	Affected: n/a

Date Public

2021-09-22 00:00

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T00:19:48.217Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "20210922 Multiple Cisco Operating Systems Unidirectional Link Detection Denial of Service Vulnerability",
            "tags": [
              "vendor-advisory",
              "x_refsource_CISCO",
              "x_transferred"
            ],
            "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-nxos-xr-udld-dos-W5hGHgtQ"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-34714",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-11-07T21:40:36.961651Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-11-07T21:59:09.403Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Cisco IOS",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "datePublic": "2021-09-22T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "CWE-20",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-09-23T02:25:58.000Z",
        "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "shortName": "cisco"
      },
      "references": [
        {
          "name": "20210922 Multiple Cisco Operating Systems Unidirectional Link Detection Denial of Service Vulnerability",
          "tags": [
            "vendor-advisory",
            "x_refsource_CISCO"
          ],
          "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-nxos-xr-udld-dos-W5hGHgtQ"
        }
      ],
      "source": {
        "advisory": "cisco-sa-ios-nxos-xr-udld-dos-W5hGHgtQ",
        "defect": [
          [
            "CSCvw22670",
            "CSCvw26126",
            "CSCvw26127",
            "CSCvw26129",
            "CSCvw26130",
            "CSCvw26152",
            "CSCvw46194",
            "CSCvw46239"
          ]
        ],
        "discovery": "INTERNAL"
      },
      "title": "Multiple Cisco Operating Systems Unidirectional Link Detection Denial of Service Vulnerability",
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "psirt@cisco.com",
          "DATE_PUBLIC": "2021-09-22T16:00:00",
          "ID": "CVE-2021-34714",
          "STATE": "PUBLIC",
          "TITLE": "Multiple Cisco Operating Systems Unidirectional Link Detection Denial of Service Vulnerability"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Cisco IOS",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Cisco"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "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."
            }
          ]
        },
        "exploit": [
          {
            "lang": "en",
            "value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
          }
        ],
        "impact": {
          "cvss": {
            "baseScore": "7.4",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
            "version": "3.0"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-20"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "20210922 Multiple Cisco Operating Systems Unidirectional Link Detection Denial of Service Vulnerability",
              "refsource": "CISCO",
              "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-nxos-xr-udld-dos-W5hGHgtQ"
            }
          ]
        },
        "source": {
          "advisory": "cisco-sa-ios-nxos-xr-udld-dos-W5hGHgtQ",
          "defect": [
            [
              "CSCvw22670",
              "CSCvw26126",
              "CSCvw26127",
              "CSCvw26129",
              "CSCvw26130",
              "CSCvw26152",
              "CSCvw46194",
              "CSCvw46239"
            ]
          ],
          "discovery": "INTERNAL"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
    "assignerShortName": "cisco",
    "cveId": "CVE-2021-34714",
    "datePublished": "2021-09-23T02:25:58.322Z",
    "dateReserved": "2021-06-15T00:00:00.000Z",
    "dateUpdated": "2024-11-07T21:59:09.403Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

BDU:2021-05131 (CVE-2021-34714)

CVE-2021-34714 (GCVE-0-2021-34714)

Tags

Sightings

Nomenclature

Related by attack behaviour