CVE intelligence and bounded remediation

CVE-2017-16566 — Qacctv Jooan A5 Ip Camera Firmware security vulnerability

Critical CVSS 9.8

On Jooan IP Camera A5 2.3.36 devices, an insecure FTP server does not require authentication, which allows remote attackers to read or replace core system files including those used for authentication (such as passwd and shadow). This can be abused to take full root level control of the device.

Severity
Critical
CVSS
9.8 (3.1)
Published
2017-11-17
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-287

Affected products

  • qacctv / jooan_a5_ip_camera_firmware / 2.3.36

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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