CVE-2017-3873 Information

Description

A vulnerability in the Plug-and-Play (PnP) subsystem of the Cisco Aironet 1800 2800 and 3800 Series Access Points running a Lightweight Access Point (AP) or Mobility Express image could allow an unauthenticated adjacent attacker to execute arbitrary code with root privileges. The vulnerability is due to insufficient validation of PnP server responses. The PnP feature is only active while the device does not contain a configuration such as a first time boot or after a factory reset has been issued. An attacker with the ability to respond to PnP configuration requests from the affected device can exploit the vulnerability by returning malicious PnP responses. If a Cisco Application Policy Infrastructure Controller - Enterprise Module (APIC-EM) is available on the network the attacker would need to exploit the issue in the short window before a valid PnP response was received. If successful the attacker could gain the ability to execute arbitrary code with root privileges on the underlying operating system of the device. Cisco has confirmed that the only vulnerable software version is 8.3.102.0. Cisco Bug IDs: CSCvb42386.

CVSS Vector

CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

http://www.securityfocus.com/bid/98296 http://www.securitytracker.com/id/1038394 https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170503-cme

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.5