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PatchSiren cyber security CVE debrief

CVE-2024-52324 Ruijie CVE debrief

A critical vulnerability in Ruijie Reyee OS versions 2.206.x through 2.319.x allows remote unauthenticated attackers to execute arbitrary operating system commands by sending malicious MQTT messages. The vulnerability stems from use of an inherently dangerous function in the device's MQTT message handling. This represents a severe risk to affected network infrastructure devices, as successful exploitation grants complete control without requiring any user interaction or prior authentication.

Vendor
Ruijie
Product
Reyee OS
CVSS
CRITICAL 9.8
CISA KEV
Not listed in stored evidence
Original CVE published
2024-12-03
Original CVE updated
2024-12-10
Advisory published
2024-12-03
Advisory updated
2024-12-10

Who should care

Organizations deploying Ruijie Reyee OS-based network infrastructure including switches, access points, and gateways; managed service providers operating Ruijie equipment; industrial control system operators using Reyee OS devices in OT networks; security teams responsible for IoT and network infrastructure asset protection.

Technical summary

The vulnerability exists in Ruijie Reyee OS MQTT message processing where an inherently dangerous function permits OS command execution through crafted MQTT payloads. Affected versions span 2.206.x through 2.319.x (exclusive of 2.320.x). CVSS 3.1 vector AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H indicates network attack vector, low complexity, no privileges required, no user interaction, with high impact across confidentiality, integrity, and availability. The attack surface is the device's MQTT broker interface, typically exposed for cloud management and device orchestration.

Defensive priority

critical

Recommended defensive actions

  • Verify device firmware version against affected range (2.206.x to 2.319.x)
  • Confirm vendor cloud fix deployment status through Ruijie support channels
  • Monitor MQTT traffic to affected devices for anomalous message patterns
  • Segment IoT/network infrastructure devices from critical business networks per ICS-CERT recommended practices
  • Apply network access controls restricting MQTT broker exposure to authorized systems only
  • Review device logs for indicators of unauthorized command execution

Evidence notes

CISA published initial advisory ICSA-24-338-01 on 2024-12-03 with CVSS 3.1 score 9.8 (Critical). Update A released 2024-12-10 revised CVSS scoring. Vendor reports cloud-based fix deployed with no end-user action required.

Official resources

2024-12-03