Denial of service in Cisco Aironet

Published: 2017-11-02 13:54:30
Severity Low
Patch available YES
Number of vulnerabilities 3
CVSSv2 3.4 (AV:A/AC:H/Au:N/C:N/I:N/A:C/E:U/RL:OF/RC:C)
3.4 (AV:A/AC:H/Au:N/C:N/I:N/A:C/E:U/RL:OF/RC:C)
3.4 (AV:A/AC:H/Au:N/C:N/I:N/A:C/E:U/RL:OF/RC:C)
CVSSv3 5.3 [CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
5.3 [CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
5.3 [CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE ID CVE-2017-12281
CVE-2017-12273
CVE-2017-12274
CWE ID CWE-287
Exploitation vector Local network
Public exploit Not available
Vulnerable software Aironet
Vulnerable software versions Aironet 3800 Series
Aironet 2800 Series
Aironet 1800 Series
Aironet 1560 Series
Vendor URL Cisco Systems, Inc
Advisory type Public

Security Advisory

1) Authentication bypass

Description

The vulnerability allows an adjacent attacker to bypass authentication and connect on the target system.

The weakness exists in the implementation of Protected Extensible Authentication Protocol (PEAP) functionality for standalone configurations of Cisco Aironet 1800, 2800, and 3800 Series Access Points due to incorrect default configuration setting of fail open when running in standalone mode. An adjacent attacker can bypass authentication and cause denial of service.

Remediation

Install update from vendor's website.

External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171101-aironet3

2) Authentication bypass

Description

The vulnerability allows a Layer 2 radio frequency (RF) adjacent attacker to bypass authentication and connect on the target system.

The weakness exists in 802.11 association request frame processing for the Cisco Aironet 1560, 2800, and 3800 Series Access Points due to insufficient frame validation of the 802.11 association request. An adjacent attacker can bypass authentication and cause the AP to reload.

Successful exploitation of the vulnerability results in denial of service.

Remediation

Install update from vendor's website (8.0.152.0, 8.2.164.0, 8.3.132.0, 8.4.100.0).

External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171101-aironet1

3) Improper input validation

Description

The vulnerability allows a Layer 2 radio frequency (RF) adjacent attacker to cause DoS condition on the target system.

The weakness exists in Extensible Authentication Protocol (EAP) ingress frame processing for the Cisco Aironet 1560, 2800, and 3800 Series Access Points due to insufficient validation of the EAP frame. A remote attacker can send a malformed EAP frame and cause the AP to reload.

Successful exploitation of the vulnerability results in denial of service.

Remediation

Install update from vendor's website (8.0.152.0, 8.2.164.0, 8.3.132.0, 8.4.100.0).

External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171101-aironet2

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