Denial of service in Cisco Aironet

1) Authentication bypass

EUVDB-ID: #VU9096

Risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/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

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Aironet: 1800 Series - 3800 Series

External links

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

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Authentication bypass

EUVDB-ID: #VU9097

Risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/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-2017-12273

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

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.

Mitigation

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

Vulnerable software versions

Aironet: 1560 Series - 3800 Series

External links

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

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Improper input validation

EUVDB-ID: #VU9098

Risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/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-2017-12274

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

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.

Mitigation

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

Vulnerable software versions

Aironet: 1560 Series - 3800 Series

External links

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

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.