CVE intelligence and bounded remediation

CVE-2020-35756 — An issue was discovered on Libre Wireless LS9 LS1.5/p7040 devices

High CVSS 7.5

An issue was discovered on Libre Wireless LS9 LS1.5/p7040 devices. There is a luci_service GETPASS Configuration Password Information Leak. The luci_service daemon running on port 7777 does not require authentication to return the device configuration password in cleartext when using the GETPASS command. As such, any unauthenticated person with access to port 7777 on the device will be able to leak the user's personal device configuration password by issuing the GETPASS command.

Severity
High
CVSS
7.5 (3.1)
Published
2021-05-03
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-306

Affected products

  • librewireless / ls9_firmware / 7040

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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