Executive Summary

Informations
Name CVE-2021-34714 First vendor Publication 2021-09-23
Vendor Cve Last vendor Modification 2021-10-13

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Overall CVSS Score 7.4
Base Score 7.4 Environmental Score 7.4
impact SubScore 4 Temporal Score 7.4
Exploitabality Sub Score 2.8
 
Attack Vector Adjacent Attack Complexity Low
Privileges Required None User Interaction None
Scope Changed Confidentiality Impact None
Integrity Impact None Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:A/AC:M/Au:N/C:N/I:N/A:C)
Cvss Base Score 5.7 Attack Range Adjacent network
Cvss Impact Score 6.9 Attack Complexity Medium
Cvss Expoit Score 5.5 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34714

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-20 Improper Input Validation

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 1
Application 2
Application 624
Hardware 1
Os 1
Os 13
Os 44
Os 747
Os 210
Os 706

Sources (Detail)

Source Url
CISCO https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-s...

Alert History

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Date Informations
2021-10-14 01:46:48
  • Multiple Updates
2021-10-13 17:23:01
  • Multiple Updates
2021-09-24 01:45:41
  • Multiple Updates
2021-09-24 01:45:18
  • Multiple Updates
2021-09-23 17:22:52
  • Multiple Updates
2021-09-23 09:22:55
  • First insertion