Horizon Alert
Summary of the vulnerability and why it matters
Wing FTP Server versions prior to 7.4.4 contain a vulnerability that allows for the injection of arbitrary Lua code. This flaw can lead to the execution of system commands with the elevated privileges of the FTP service. The vulnerability is exploitable through both user and administrative interfaces, and even via anonymous FTP accounts. This could result in a complete compromise of the server.
- Wing FTP Server web interfaces
- Null byte handling allows code injection
- Complete server compromise possible
Attack Path
How an attacker could exploit the issue
Wing FTP Server versions prior to 7.4.4 contain a vulnerability in the user and admin web interfaces. This vulnerability allows for the injection of arbitrary Lua code into user session files, which can lead to the execution of system commands with the privileges of the FTP service. This vulnerability is exploitable even by anonymous FTP accounts, potentially resulting in a total server compromise.
- Exposure through web interfaces.
- Attacker injects malicious code.
- Arbitrary code execution achieved.
Live Threat
Current exploitation, exposure, and threat context
A vulnerability in Wing FTP Server allows for remote code execution by injecting arbitrary Lua code. This can lead to the execution of system commands with elevated privileges, potentially resulting in a complete server compromise. The vulnerability is exploitable even through anonymous FTP accounts.
- Likely attacker skill level: Low
- Required access or conditions: Anonymous access
- Business risk or urgency: Critical
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
This vulnerability allows for arbitrary code execution by exploiting how the Wing FTP Server handles null bytes in its user and admin interfaces. Attackers can inject Lua code into session files, leading to the execution of system commands with elevated privileges. This could result in a complete server compromise, even through anonymous FTP accounts.
- Identify all Wing FTP Server instances.
- Isolate affected servers from the network.
- Apply vendor updates and verify.
- Monitor for related suspicious activity.
