CVE-2021-34713

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

High · published September 9, 2021

CVSS v3.1
7.4
EPSS
0%
Percentile
28.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.4 · HIGH
Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00360 · 28.6th percentile
Published
2021-09-09T05:00Z
EPSS history
Timeline
  • 09 SEP 05:00Z
    Cisco IOS XR Software for ASR 9000 Series Routers Denial of Service Vulnerability
    cvelistv5