CVE-2021-1621

Published: Sep 23, 2021Modified: Nov 21, 2024

7.4

Vector

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

Exploitability: 2.8 / Impact: 4.0

Source: NVD

Description

A vulnerability in the Layer 2 punt code of Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a queue wedge on an interface that receives specific Layer 2 frames, resulting in a denial of service (DoS) condition. This vulnerability is due to improper handling of certain Layer 2 frames. An attacker could exploit this vulnerability by sending specific Layer 2 frames on the segment the router is connected to. A successful exploit could allow the attacker to cause a queue wedge on the interface, resulting in a DoS condition.

Affected (1)

Products: Cisco: Ios Xe

Cisco

1 product

Ios Xe

Configuration A

15 platform

Running on/with	Platform Versions
Cisco 1000 Integrated Services Router	All versions
Cisco 1100 4g/6g Integrated Services Router	All versions
Cisco 1100 4p Integrated Services Router	All versions
Cisco 1100 8p Integrated Services Router	All versions
Cisco 1100 Integrated Services Router	All versions
Cisco 1101 4p Integrated Services Router	All versions
Cisco 1101 Integrated Services Router	All versions
Cisco 1109 2p Integrated Services Router	All versions
Cisco 1109 4p Integrated Services Router	All versions
Cisco 1109 Integrated Services Router	All versions
Cisco 1111x 8p Integrated Services Router	All versions
Cisco 1111x Integrated Services Router	All versions
Cisco 111x Integrated Services Router	All versions
Cisco 1120 Integrated Services Router	All versions
Cisco 1160 Integrated Services Router	All versions

Configuration B

9 platform

Running on/with	Platform Versions
Cisco 4000 Integrated Services Router	All versions
Cisco 4221 Integrated Services Router	All versions
Cisco 4321 Integrated Services Router	All versions
Cisco 4331 Integrated Services Router	All versions
Cisco 4351 Integrated Services Router	All versions
Cisco 4431 Integrated Services Router	All versions
Cisco 4451 X Integrated Services Router	All versions
Cisco 4451 Integrated Services Router	All versions
Cisco 4461 Integrated Services Router	All versions

Configuration C

18 platform

Running on/with	Platform Versions
Cisco Asr 1000	All versions
Cisco Asr 1000 X	All versions
Cisco Asr 1001	All versions
Cisco Asr 1001 Hx	All versions
Cisco Asr 1001 Hx R	All versions
Cisco Asr 1001 X	All versions
Cisco Asr 1001 X R	All versions
Cisco Asr 1002	All versions
Cisco Asr 1002 Hx	All versions
Cisco Asr 1002 Hx R	All versions
Cisco Asr 1002 X	All versions
Cisco Asr 1002 X R	All versions
Cisco Asr 1004	All versions
Cisco Asr 1006	All versions
Cisco Asr 1006 X	All versions
Cisco Asr 1009 X	All versions
Cisco Asr 1013	All versions
Cisco Asr 1023	All versions