CVE-2021-34713

Cisco IOS XR Software for ASR 9000 Series Routers Denial of Service Vulnerability

State: Published
Severity: 7.4 High
Published: Sep 9, 2021
Updated: Nov 7, 2024
Reserved: Jun 15, 2021

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.

Scores

CVSS	Score	Vector	Source
3.1	7.4 High	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H	cisco

Weaknesses

CWE-399

Affected Products

Product	Versions
Cisco IOS XR SoftwareCisco	n/aAffected

References

20210908 Cisco IOS XR Software for ASR 9000 Series Routers Denial of Service Vulnerabilityvendor-advisory

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