CVE-2021-34740

CVSS V2 Medium 6.1 CVSS V3 High 7.4

Description

A vulnerability in the WLAN Control Protocol (WCP) implementation for Cisco Aironet Access Point (AP) software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. This vulnerability is due to incorrect error handling when an affected device receives an unexpected 802.11 frame. An attacker could exploit this vulnerability by sending certain 802.11 frames over the wireless network to an interface on an affected AP. A successful exploit could allow the attacker to cause a packet buffer leak. This could eventually result in buffer allocation failures, which would trigger a reload of the affected device.

Overview

CVE ID
CVE-2021-34740

Assigner
ykramarz@cisco.com

Vulnerability Status
Analyzed

Published Version
2021-09-23T03:15:19

Last Modified Date
2021-10-14T14:14:19

Weakness Enumerations

CWE	URL
CWE-401	http://cwe.mitre.org/data/definitions/401.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
		AND
cpe:2.3:o:cisco:aironet_access_point_software::::::::	1	OR	8.10.0	8.10.162.0
cpe:2.3:o:cisco:aironet_access_point_software:17.2:::::::*	1	OR
cpe:2.3:o:cisco:aironet_access_point_software:17.3:::::::*	1	OR
cpe:2.3:h:cisco:6300_series_access_points:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_1540:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_1542d:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_1542i:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_1560:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_1562d:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_1562e:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_1562i:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_1800:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_1800i:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_1810:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_1810w:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_1815:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_1815i:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_1830:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_1830e:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_1830i:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_1840:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_1850:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_1850e:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_1850i:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_2800:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_2800e:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_2800i:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_3800:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_3800e:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_3800i:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_3800p:-:::::::*	0	OR
cpe:2.3:h:cisco:aironet_4800:-:::::::*	0	OR
cpe:2.3:h:cisco:catalyst_9100:-:::::::*	0	OR
cpe:2.3:h:cisco:catalyst_9105:-:::::::*	0	OR
cpe:2.3:h:cisco:catalyst_9105axi:-:::::::*	0	OR
cpe:2.3:h:cisco:catalyst_9105axw:-:::::::*	0	OR
cpe:2.3:h:cisco:catalyst_9115:-:::::::*	0	OR
cpe:2.3:h:cisco:catalyst_9115_ap:-:::::::*	0	OR
cpe:2.3:h:cisco:catalyst_9115axe:-:::::::*	0	OR
cpe:2.3:h:cisco:catalyst_9115axi:-:::::::*	0	OR
cpe:2.3:h:cisco:catalyst_9117:-:::::::*	0	OR
cpe:2.3:h:cisco:catalyst_9117_ap:-:::::::*	0	OR
cpe:2.3:h:cisco:catalyst_9117axi:-:::::::*	0	OR
cpe:2.3:h:cisco:catalyst_9120:-:::::::*	0	OR
cpe:2.3:h:cisco:catalyst_9120_ap:-:::::::*	0	OR
cpe:2.3:h:cisco:catalyst_9120axe:-:::::::*	0	OR
cpe:2.3:h:cisco:catalyst_9120axi:-:::::::*	0	OR
cpe:2.3:h:cisco:catalyst_9120axp:-:::::::*	0	OR
cpe:2.3:h:cisco:catalyst_9124:-:::::::*	0	OR
cpe:2.3:h:cisco:catalyst_9124axd:-:::::::*	0	OR
cpe:2.3:h:cisco:catalyst_9124axi:-:::::::*	0	OR
cpe:2.3:h:cisco:catalyst_9130:-:::::::*	0	OR
cpe:2.3:h:cisco:catalyst_9130_ap:-:::::::*	0	OR
cpe:2.3:h:cisco:catalyst_9130axe:-:::::::*	0	OR
cpe:2.3:h:cisco:catalyst_9130axi:-:::::::*	0	OR
cpe:2.3:h:cisco:catalyst_iw6300:-:::::::*	0	OR
cpe:2.3:h:cisco:catalyst_iw6300_ac:-:::::::*	0	OR
cpe:2.3:h:cisco:catalyst_iw6300_dc:-:::::::*	0	OR
cpe:2.3:h:cisco:catalyst_iw6300_dcw:-:::::::*	0	OR
cpe:2.3:h:cisco:isr_1100:-:::::::*	0	OR
cpe:2.3:h:cisco:isr_1100-4g\/6g:-:::::::*	0	OR
cpe:2.3:h:cisco:isr_1100-4p:-:::::::*	0	OR
cpe:2.3:h:cisco:isr_1100-8p:-:::::::*	0	OR
cpe:2.3:h:cisco:isr_1101:-:::::::*	0	OR
cpe:2.3:h:cisco:isr_1101-4p:-:::::::*	0	OR
cpe:2.3:h:cisco:isr_1109:-:::::::*	0	OR
cpe:2.3:h:cisco:isr_1109-2p:-:::::::*	0	OR
cpe:2.3:h:cisco:isr_1109-4p:-:::::::*	0	OR
cpe:2.3:h:cisco:isr_1111x:-:::::::*	0	OR
cpe:2.3:h:cisco:isr_1111x-8p:-:::::::*	0	OR
cpe:2.3:h:cisco:isr_111x:-:::::::*	0	OR
cpe:2.3:h:cisco:isr_1120:-:::::::*	0	OR
cpe:2.3:h:cisco:isr_1160:-:::::::*	0	OR

CVSS Version 2

Version
2.0

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

Access Vector
ADJACENT_NETWORK

Access Compatibility
LOW

Authentication
NONE

Confidentiality Impact
NONE

Integrity Impact
NONE

Availability Impact
COMPLETE

Base Score
6.1

Severity
MEDIUM

Exploitability Score
6.5

Impact Score
6.9

CVSS Version 3

Version
3.1

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

Attack Vector
ADJACENT_NETWORK

Attack Compatibility
LOW

Privileges Required
NONE

User Interaction
NONE

Scope
CHANGED

Confidentiality Impact
NONE

Availability Impact
HIGH

Base Score
7.4

Base Severity
HIGH

Exploitability Score
2.8

Impact Score
4

References

Reference URL	Reference Tags
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-airo-wpa-pktleak-dos-uSTyGrL	Vendor Advisory

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2021-34740
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34740

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 06:51:43				Added to TrackCVE
2022-12-05 11:10:00	psirt@cisco.com	ykramarz@cisco.com	CVE Assigner	updated
2022-12-05 11:10:00	2021-09-23T03:15Z	2021-09-23T03:15:19	CVE Published Date	updated
2022-12-05 11:10:00		2021-10-14T14:14:19	CVE Modified Date	updated
2022-12-05 11:10:00		Analyzed	Vulnerability Status	updated