A vulnerability in IPv6 traffic processing of Cisco IOS XE Wireless Controller Software for Cisco Catalyst 9000 Family Wireless Controllers could allow an unauthenticated, adjacent attacker to cause a Layer 2 (L2) loop in a configured VLAN, resulting in a denial of service (DoS) condition for that VLAN. The vulnerability is due to a logic error when processing specific link-local IPv6 traffic. An attacker could exploit this vulnerability by sending a crafted IPv6 packet that would flow inbound through the wired interface of an affected device. A successful exploit could allow the attacker to cause traffic drops in the affected VLAN, thus triggering the DoS condition.
Metrics
No CVSS v4.0
Attack Vector Adjacent Network
Attack Complexity Low
Privileges Required None
Scope Changed
Confidentiality Impact None
Integrity Impact None
Availability Impact High
User Interaction None
No CVSS v3.0
Access Vector Adjacent Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
AV:A/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
Key SSVC decision points have not yet been added.
Affected Vendors & Products
Vendors | Products |
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Cisco |
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Configuration 1 [-]
AND |
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No data.
References
History
No history.
MITRE
Status: PUBLISHED
Assigner: cisco
Published: 2021-09-23T02:26:47.045837Z
Updated: 2024-09-16T18:13:05.150Z
Reserved: 2021-06-15T00:00:00
Link: CVE-2021-34767
Vulnrichment
No data.
NVD
Status : Modified
Published: 2021-09-23T03:15:20.180
Modified: 2023-11-07T03:36:20.983
Link: CVE-2021-34767
Redhat
No data.