Denial of service in Cisco Wireless LAN Controller



Published: 2017-11-02
Risk Low
Patch available NO
Number of vulnerabilities 2
CVE-ID CVE-2017-12280
CVE-2017-12282
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		Cisco Wireless LAN Controller
Hardware solutions / Firmware

Vendor Cisco Systems, Inc

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Improper input validation

EUVDB-ID: #VU9089

Risk: Low

CVSSv3.1: 4 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:U/RL:U/RC:C]

CVE-ID: CVE-2017-12280

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows an remote attacker to cause DoS condition on the target system.

The weakness exists in the Control and Provisioning of Wireless Access Points (CAPWAP) Discovery Request parsing functionality of Cisco Wireless LAN Controllers due to incomplete input validation of fields in CAPWAP Discovery Request packets. An remote attacker can send a specially crafted CAPWAP Discovery Request packets and cause the device to reload.

Successful exploitation of the vulnerability results in denial of service.

Mitigation

Cubersecurity Help is currently unaware of any solutions addressing the vulnerability.

Vulnerable software versions

Cisco Wireless LAN Controller: 8.0.133.0

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171101-wlc3


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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

2) Improper input validation

EUVDB-ID: #VU9090

Risk: Low

CVSSv3.1: 4 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:U/RL:U/RC:C]

CVE-ID: CVE-2017-12282

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows an Layer 2 RF-adjacent attacker to cause DoS condition on the target system.

The weakness exists in the Access Network Query Protocol (ANQP) ingress frame processing functionality of Cisco Wireless LAN Controllers due to incomplete input validation of of ANQP query frames. An remote attacker can send a malformed ANQP query frame that is on an RF-adjacent network and cause the device to restart.

Successful exploitation of the vulnerability results in denial of service.

Mitigation

Cubersecurity Help is currently unaware of any solutions addressing the vulnerability.

Vulnerable software versions

Cisco Wireless LAN Controller: 8.0.140.0 - 8.2.121.11

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171101-wlc4


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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



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