CVE-2019-19842

Vulnerability

The vulnerability resides in the emfd component of Ruckus Wireless Unleashed firmware through version 200.7.10.102.64. It allows remote attackers to execute arbitrary OS commands by sending a POST request to admin/_cmdstat.jsp with the attribute xcmd=spectra-analysis and a malicious mac parameter. This is a command injection flaw that requires no authentication [1].

Exploitation

An attacker can exploit this vulnerability by sending a crafted HTTP POST request to the target device. The mac parameter is injectable with command syntax; the xcmd=spectra-analysis triggers the vulnerable code path. No prior authentication or user interaction is needed, making it exploitable pre-authentication from any network-accessible location [1][3].

Impact

Successful exploitation results in arbitrary OS command execution with root privileges, leading to full compromise of the access point. An attacker can read/modify configurations, exfiltrate data, install malware, or pivot to internal networks [1].

Mitigation

Ruckus has released a firmware update (200.7.10.102.64 or later) to address this issue [1]. Users should upgrade to the latest version. If patching is not possible, restrict network access to the management interface and disable WAN-facing services.