#VU12387 Improper input validation in Cisco Aironet 1850 Series Access Points - CVE-2018-0234
Published: May 7, 2018
Vulnerability identifier: #VU12387
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2018-0234
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Cisco Aironet 1850 Series Access Points
Cisco Aironet 1850 Series Access Points
Software vendor:
Cisco Systems, Inc
Cisco Systems, Inc
Description
The vulnerability allows a remote unauthenticated attacker to cause DoS condition on the target system.
The weakness exists in the implementation of Point-to-Point Tunneling Protocol (PPTP) functionality due to insufficient validation of Generic Routing Encapsulation (GRE) frames that pass through the data plane of an affected access point. A remote attacker can initiate a PPTP connection to an affected access point from a device that is registered to the same wireless network as the access point and sending a malicious GRE frame through the data plane of the access point and cause the service to crash.
Remediation
Update to versions 8.7(102.0), 8.7(1.24), 8.6(101.0), 8.6(1.108), 8.5(110.0), 8.5(107.37) or 8.5(103.9).