CVE intelligence and bounded remediation

CVE-2017-3831 — Cisco Aironet Access Point Software security vulnerability

Critical CVSS 9.8

A vulnerability in the web-based GUI of Cisco Mobility Express 1800 Series Access Points could allow an unauthenticated, remote attacker to bypass authentication. The attacker could be granted full administrator privileges. The vulnerability is due to improper implementation of authentication for accessing certain web pages using the GUI interface. An attacker could exploit this vulnerability by sending a crafted HTTP request to the web interface of the affected system. A successful exploit could allow the attacker to bypass authentication and perform unauthorized configuration changes or issue control commands to the affected device. This vulnerability affects Cisco Mobility Express 1800 Series Access Points running a software version prior to 8.2.110.0. Cisco Bug IDs: CSCuy68219.

Severity
Critical
CVSS
9.8 (3.0)
Published
2017-03-15
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-264, CWE-287

Affected products

  • cisco / aironet_access_point_software / 8.1(15.14)
  • cisco / aironet_access_point_software / 8.1(112.3)
  • cisco / aironet_access_point_software / 8.1(112.4)
  • cisco / aironet_access_point_software / 8.1(131.0)

Matched remediation archetype

Authentication bypass and missing authentication

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Check exposure

  • Map every affected endpoint and protocol path, including alternate ports, legacy routes, recovery flows, service accounts, and machine-to-machine access.
  • Confirm which deployments enable the affected authentication mode and whether the interface is reachable from untrusted networks.
  • Review session, token, credential, and proxy trust configuration without attempting account takeover.

Remediate safely

  • Apply the supported fix and centralize fail-closed authentication before protected request handling.
  • Remove default or embedded credentials, rotate affected secrets and sessions, and bind authentication decisions to the intended audience and channel.
  • Add negative tests for alternate routes, malformed or absent credentials, recovery flows, and proxy-derived identity.

Authoritative sources

Complete CVE record and remediation plan

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