CVE-2019-1834

Current Description

A vulnerability in the internal packet processing of Cisco Aironet Series Access Points (APs) could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected AP if the switch interface where the AP is connected has port security configured. The vulnerability exists because the AP forwards some malformed wireless client packets outside of the Control and Provisioning of Wireless Access Points (CAPWAP) tunnel. An attacker could exploit this vulnerability by sending crafted wireless packets to an affected AP. A successful exploit could allow the attacker to trigger a security violation on the adjacent switch port, which could result in a DoS condition. Note: Though the Common Vulnerability Scoring System (CVSS) score corresponds to a High Security Impact Rating (SIR), this vulnerability is considered Medium because a workaround is available and exploitation requires a specific switch configuration. There are workarounds that address this vulnerability.

Basic Data

Published	April 18, 2019
Last Modified	October 09, 2019
Assigner	cve@mitre.org
Data Type	CVE
Data Format	MITRE
Data Version	4.0
Problem Type	CWE-20
CVE Data Version	4.0

Base Metric V2

CVSS 2 - Version	2.0
CVSS 2 - Vector String	AV:A/AC:L/Au:N/C:N/I:N/A:P
CVSS 2 - Access Vector	ADJACENT_NETWORK
CVSS 2 - Access Complexity	LOW
CVSS 2 - Authentication	NONE
CVSS 2 - Confidentiality Impact	NONE
CVSS 2 - Availability Impact	PARTIAL
CVSS 2 - Base Score	3.3
Severity	LOW
Exploitability Score	6.5
Impact Score	2.9
Obtain All Privilege	false
Obtain User Privilege	false
Obtain Other Privilege	false

Base Metric V3

CVSS 3 - Version	3.0
CVSS 3 - Vector String	CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3 - Attack Vector	ADJACENT_NETWORK
CVSS 3 - Attack Complexity	LOW
CVSS 3 - Privileges Required	NONE
CVSS 3 - User Interaction	NONE
CVSS 3 - Scope	UNCHANGED
CVSS 3 - Confidentiality Impact	NONE
CVSS 3 - Integrity Impact	NONE
CVSS 3 - Availability Impact	HIGH
CVSS 3 - Base Score	6.5
CVSS 3 - Base Severity	MEDIUM
Exploitability Score	2.8
Base Severity	MEDIUM

Configurations

AND

OR - Configuration 1

Cpe Version	Part	Vendor	Product	Version	Update	Edition	Language	SW Edition	Target SW	Target HW	Other	Version Start Including	Version End Excluding
2.3	OS	Cisco	Aironet Access Point Firmware	*	*	*	*	*	*	*	*	8.5	8.5.140.0
2.3	OS	Cisco	Aironet Access Point Firmware	*	*	*	*	*	*	*	*	8.6.101.0	8.8.111.0
2.3	OS	Cisco	Aironet Access Point Firmware	*	*	*	*	*	*	*	*	8.8.120.0	8.9.100.0

OR Running on/with:

Cpe Version	Part	Vendor	Product	Version	Update	Edition	Language	SW Edition	Target SW	Target HW	Other
2.3	Hardware	Cisco	Aironet 1542d	-	*	*	*	*	*	*	*
2.3	Hardware	Cisco	Aironet 1542i	-	*	*	*	*	*	*	*
2.3	Hardware	Cisco	Aironet 1562d	-	*	*	*	*	*	*	*
2.3	Hardware	Cisco	Aironet 1562e	-	*	*	*	*	*	*	*
2.3	Hardware	Cisco	Aironet 1562i	-	*	*	*	*	*	*	*
2.3	Hardware	Cisco	Aironet 1800i	-	*	*	*	*	*	*	*
2.3	Hardware	Cisco	Aironet 2800e	-	*	*	*	*	*	*	*
2.3	Hardware	Cisco	Aironet 2800i	-	*	*	*	*	*	*	*
2.3	Hardware	Cisco	Aironet 3800e	-	*	*	*	*	*	*	*
2.3	Hardware	Cisco	Aironet 3800i	-	*	*	*	*	*	*	*
2.3	Hardware	Cisco	Aironet 3800p	-	*	*	*	*	*	*	*

AND

OR - Configuration 2

Cpe Version	Part	Vendor	Product	Version	Update	Edition	Language	SW Edition	Target SW	Target HW	Other	Version Start Including	Version End Including	Version Start Excluding	Version End Excluding
2.3	OS	Cisco	Aironet Access Point Firmware	8.5(131.0)	*	*	*	*	*	*	*

OR Running on/with:

Cpe Version	Part	Vendor	Product	Version	Update	Edition	Language	SW Edition	Target SW	Target HW	Other	Version Start Including	Version End Including	Version Start Excluding	Version End Excluding
2.3	Hardware	Cisco	Aironet 1850e	-	*	*	*	*	*	*	*
2.3	Hardware	Cisco	Aironet 1850i	-	*	*	*	*	*	*	*

Vulnerable Software List

Vendor	Product	Versions
Cisco	Aironet Access Point Firmware	*, 8.5(131.0)

References

Name	Source	URL	Tags
108000	http://www.securityfocus.com/bid/108000	BID	Third Party Advisory VDB Entry
20190417 Cisco Aironet Series Access Points Denial of Service Vulnerability	https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190417-air-ap-dos	CISCO	Vendor Advisory