CVE-2021-1621

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-1621
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.

7.4 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 4.0

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope CHANGED

3.3 /10

CVSS v2.0 : LOW

V2 Legend

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

Exploitability : 6.5 / Impact : 2.9

Access Vector ADJACENT_NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References
Link Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-quewedge-69BsHUBW Patch Vendor Advisory
Configurations

Configuration 1 (hide)

AND
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
OR cpe:2.3:h:cisco:1000_integrated_services_router:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:1100-4g\/6g_integrated_services_router:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:1100-4p_integrated_services_router:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:1100-8p_integrated_services_router:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:1100_integrated_services_router:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:1101-4p_integrated_services_router:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:1101_integrated_services_router:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:1109-2p_integrated_services_router:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:1109-4p_integrated_services_router:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:1109_integrated_services_router:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:1111x-8p_integrated_services_router:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:1111x_integrated_services_router:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:111x_integrated_services_router:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:1120_integrated_services_router:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:1160_integrated_services_router:-:*:*:*:*:*:*:*

Configuration 2 (hide)

AND
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
OR cpe:2.3:h:cisco:4000_integrated_services_router:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:4221_integrated_services_router:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:4321_integrated_services_router:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:4331_integrated_services_router:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:4351_integrated_services_router:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:4431_integrated_services_router:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:4451-x_integrated_services_router:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:4451_integrated_services_router:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:4461_integrated_services_router:-:*:*:*:*:*:*:*

Configuration 3 (hide)

AND
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
OR cpe:2.3:h:cisco:asr_1000:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_1000-x:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_1001:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_1001-hx:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_1001-hx_r:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_1001-x:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_1001-x_r:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_1002:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_1002-hx:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_1002-hx_r:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_1002-x:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_1002-x_r:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_1004:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_1006:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_1006-x:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_1009-x:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_1013:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_1023:-:*:*:*:*:*:*:*

Configuration 4 (hide)

AND
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
cpe:2.3:h:cisco:csr_1000v:-:*:*:*:*:*:*:*

Configuration 5 (hide)

AND
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
cpe:2.3:h:cisco:isrv:-:*:*:*:*:*:*:*
History

No history.

Information

Published : 2021-09-23 03:15

Updated : 2024-02-28 18:48

NVD link : CVE-2021-1621

Mitre link : CVE-2021-1621

CVE.ORG link : CVE-2021-1621

JSON object : View

Products Affected

cisco

  • 1100-4p_integrated_services_router
  • 4351_integrated_services_router
  • 4451-x_integrated_services_router
  • asr_1001-hx
  • asr_1002-x_r
  • 4331_integrated_services_router
  • 111x_integrated_services_router
  • 1101_integrated_services_router
  • asr_1000
  • asr_1001-x_r
  • 4000_integrated_services_router
  • 1109-2p_integrated_services_router
  • asr_1009-x
  • 4451_integrated_services_router
  • asr_1000-x
  • 1100-4g\/6g_integrated_services_router
  • ios_xe
  • 1120_integrated_services_router
  • 1109_integrated_services_router
  • 4431_integrated_services_router
  • asr_1002-hx
  • asr_1006
  • asr_1001
  • 4321_integrated_services_router
  • 1100-8p_integrated_services_router
  • 1111x-8p_integrated_services_router
  • 1111x_integrated_services_router
  • 4461_integrated_services_router
  • asr_1002-x
  • asr_1002-hx_r
  • asr_1001-hx_r
  • 1109-4p_integrated_services_router
  • 1160_integrated_services_router
  • csr_1000v
  • 1000_integrated_services_router
  • 4221_integrated_services_router
  • asr_1004
  • 1101-4p_integrated_services_router
  • asr_1001-x
  • asr_1013
  • 1100_integrated_services_router
  • asr_1002
  • asr_1006-x
  • isrv
  • asr_1023
CWE
NVD-CWE-noinfo CWE-399

Resource Management Errors


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