CVE-2021-34713

high

Description

A vulnerability in the Layer 2 punt code of Cisco IOS XR Software running on Cisco ASR 9000 Series Aggregation Services Routers could allow an unauthenticated, adjacent attacker to cause the affected line card to reboot. This vulnerability is due to incorrect handling of specific Ethernet frames that cause a spin loop that can make the network processors unresponsive. An attacker could exploit this vulnerability by sending specific types of Ethernet frames on the segment where the affected line cards are attached. A successful exploit could allow the attacker to cause the affected line card to reboot.

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-npspin-QYpwdhFD

Details

Source: MITRE

Published: 2021-09-09

Updated: 2021-09-21

Risk Information

CVSS v2

Base Score: 6.1

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

Impact Score: 6.9

Exploitability Score: 6.5

Severity: MEDIUM

CVSS v3

Base Score: 7.4

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

Impact Score: 4

Exploitability Score: 2.8

Severity: HIGH