Advisories

Cudy TR3000 before 2.5.42 MQTT JWT Authentication Bypass via alg none Tokens

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Severity
critical
Date
Affecting
  • TR3000 1.0 >= 0, < 2.5.42

CWE
  • CWE-347 Improper Verification of Cryptographic Signature
CVSS
9.2
CVSS V4 Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Description
Cudy TR3000 before 2.5.42 contains an authentication bypass vulnerability in the Mosquitto plugin auth_plugin_jwt.so that accepts unsigned JWTs using alg none. Attackers holding any Cudy-trusted client certificate can authenticate as admincudydevice on port 8883 and publish batchcmd requests to execute commands as root.

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