CVE intelligence and bounded remediation

CVE-2019-16243 — Alcatelmobile Cingular Flip 2 Firmware security vulnerability

Medium CVSS 6.1

On TCL Alcatel Cingular Flip 2 B9HUAH1 devices, there is an undocumented web API that allows unprivileged JavaScript, including JavaScript running within the KaiOS browser, to view and edit the device's firmware over-the-air update settings. (This web API is normally used by the system application to trigger firmware updates via OmaService.js.)

Severity
Medium
CVSS
6.1 (3.1)
Published
2019-11-26
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-306

Affected products

  • alcatelmobile / cingular_flip_2_firmware / b9huah1

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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