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[email protected]NVD:CVE-2021-34767

HistorySep 23, 2021 - 3:15 a.m.

CVE-2021-34767

2021-09-2303:15:20

CWE-670

[email protected]

web.nvd.nist.gov

cve-2021-34767

cisco

ipv6

wireless controller

denial of service

CVSS2

3.3

Attack Vector

ADJACENT_NETWORK

Attack 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

CVSS3

7.4

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.001

Percentile

23.3%

JSON

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.

Affected configurations

Nvd

Node

ciscoios_xe

ciscoios_xeMatch3.15.1xbs

ciscoios_xeMatch3.15.2xbs

ciscoios_xeMatch16.7.1

ciscoios_xeMatch16.7.1a

ciscoios_xeMatch16.7.1b

ciscoios_xeMatch16.7.2

ciscoios_xeMatch16.7.3

ciscoios_xeMatch16.7.4

ciscoios_xeMatch16.8.1

ciscoios_xeMatch16.8.1a

ciscoios_xeMatch16.8.1b

ciscoios_xeMatch16.8.1c

ciscoios_xeMatch16.8.1d

ciscoios_xeMatch16.8.1e

ciscoios_xeMatch16.8.1s

ciscoios_xeMatch16.8.2

ciscoios_xeMatch16.8.3

ciscoios_xeMatch16.9.1

ciscoios_xeMatch16.9.1a

ciscoios_xeMatch16.9.1b

ciscoios_xeMatch16.9.1c

ciscoios_xeMatch16.9.1d

ciscoios_xeMatch16.9.1s

ciscoios_xeMatch16.9.2

ciscoios_xeMatch16.9.2a

ciscoios_xeMatch16.9.2s

ciscoios_xeMatch16.9.3

ciscoios_xeMatch16.9.3a

ciscoios_xeMatch16.9.3h

ciscoios_xeMatch16.9.3s

ciscoios_xeMatch16.9.4

ciscoios_xeMatch16.9.4c

ciscoios_xeMatch16.9.5

ciscoios_xeMatch16.9.5f

ciscoios_xeMatch16.9.6

ciscoios_xeMatch16.9.7

ciscoios_xeMatch16.10.1

ciscoios_xeMatch16.10.1a

ciscoios_xeMatch16.10.1b

ciscoios_xeMatch16.10.1c

ciscoios_xeMatch16.10.1d

ciscoios_xeMatch16.10.1e

ciscoios_xeMatch16.10.1f

ciscoios_xeMatch16.10.1g

ciscoios_xeMatch16.10.1s

ciscoios_xeMatch16.10.2

ciscoios_xeMatch16.10.3

ciscoios_xeMatch16.11.1

ciscoios_xeMatch16.11.1a

ciscoios_xeMatch16.11.1b

ciscoios_xeMatch16.11.1c

ciscoios_xeMatch16.11.1s

ciscoios_xeMatch16.11.2

ciscoios_xeMatch16.12.1

ciscoios_xeMatch16.12.1a

ciscoios_xeMatch16.12.1c

ciscoios_xeMatch16.12.1s

ciscoios_xeMatch16.12.1t

ciscoios_xeMatch16.12.1w

ciscoios_xeMatch16.12.1x

ciscoios_xeMatch16.12.1y

ciscoios_xeMatch16.12.1z

ciscoios_xeMatch16.12.1z1

ciscoios_xeMatch16.12.1za

ciscoios_xeMatch16.12.2

ciscoios_xeMatch16.12.2a

ciscoios_xeMatch16.12.2s

ciscoios_xeMatch16.12.2t

ciscoios_xeMatch16.12.3

ciscoios_xeMatch16.12.3a

ciscoios_xeMatch16.12.3s

ciscoios_xeMatch16.12.4

ciscoios_xeMatch16.12.4a

ciscoios_xeMatch17.1.1

ciscoios_xeMatch17.1.1a

ciscoios_xeMatch17.1.1s

ciscoios_xeMatch17.1.1t

ciscoios_xeMatch17.1.2

ciscoios_xeMatch17.1.3

ciscoios_xeMatch17.2.1

ciscoios_xeMatch17.2.1a

ciscoios_xeMatch17.2.1r

ciscoios_xeMatch17.2.1v

ciscoios_xeMatch17.2.2

ciscoios_xeMatch17.2.3

ciscoios_xeMatch17.3.1

ciscoios_xeMatch17.3.1a

ciscoios_xeMatch17.3.1w

ciscoios_xeMatch17.3.1x

ciscoios_xeMatch17.3.1z

ciscoios_xeMatch17.3.2

ciscoios_xeMatch17.3.2a

AND

ciscocatalyst_9800Match-

ciscocatalyst_9800-40Match-

ciscocatalyst_9800-80Match-

ciscocatalyst_9800-clMatch-

ciscocatalyst_9800-lMatch-

ciscocatalyst_9800-l-cMatch-

ciscocatalyst_9800-l-fMatch-

ciscocatalyst_9800_embedded_wireless_controllerMatch-

VendorProductVersionCPE
ciscoios_xe*cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
ciscoios_xe3.15.1xbscpe:2.3:o:cisco:ios_xe:3.15.1xbs:*:*:*:*:*:*:*
ciscoios_xe3.15.2xbscpe:2.3:o:cisco:ios_xe:3.15.2xbs:*:*:*:*:*:*:*
ciscoios_xe16.7.1cpe:2.3:o:cisco:ios_xe:16.7.1:*:*:*:*:*:*:*
ciscoios_xe16.7.1acpe:2.3:o:cisco:ios_xe:16.7.1a:*:*:*:*:*:*:*
ciscoios_xe16.7.1bcpe:2.3:o:cisco:ios_xe:16.7.1b:*:*:*:*:*:*:*
ciscoios_xe16.7.2cpe:2.3:o:cisco:ios_xe:16.7.2:*:*:*:*:*:*:*
ciscoios_xe16.7.3cpe:2.3:o:cisco:ios_xe:16.7.3:*:*:*:*:*:*:*
ciscoios_xe16.7.4cpe:2.3:o:cisco:ios_xe:16.7.4:*:*:*:*:*:*:*
ciscoios_xe16.8.1cpe:2.3:o:cisco:ios_xe:16.8.1:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
cisco	ios_xe	*	cpe:2.3:o:cisco:ios_xe::::::::
cisco	ios_xe	3.15.1xbs	cpe:2.3:o:cisco:ios_xe:3.15.1xbs:::::::*
cisco	ios_xe	3.15.2xbs	cpe:2.3:o:cisco:ios_xe:3.15.2xbs:::::::*
cisco	ios_xe	16.7.1	cpe:2.3:o:cisco:ios_xe:16.7.1:::::::*
cisco	ios_xe	16.7.1a	cpe:2.3:o:cisco:ios_xe:16.7.1a:::::::*
cisco	ios_xe	16.7.1b	cpe:2.3:o:cisco:ios_xe:16.7.1b:::::::*
cisco	ios_xe	16.7.2	cpe:2.3:o:cisco:ios_xe:16.7.2:::::::*
cisco	ios_xe	16.7.3	cpe:2.3:o:cisco:ios_xe:16.7.3:::::::*
cisco	ios_xe	16.7.4	cpe:2.3:o:cisco:ios_xe:16.7.4:::::::*
cisco	ios_xe	16.8.1	cpe:2.3:o:cisco:ios_xe:16.8.1:::::::*

Rows per page:

1-10 of 1011

References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewlc-ipv6-dos-NMYeCnZv

CVSS2

3.3

Attack Vector

ADJACENT_NETWORK

Attack 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

CVSS3

7.4

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.001

Percentile

23.3%

JSON

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