Wing FTP Server RCE Analysis (CVE-2025-41812)

Key Information Summary Vulnerability Overview Vulnerability Name: Wing FTP Server RCE (CVE-2025-41812) Affected Versions: 6.3.9 and earlier Vulnerability Type: Remote Code Execution (RCE) Vulnerability Details NULL Character Issue Wing FTP Server fails to properly handle NULL characters ( ) in user input, leading to string truncation and potential security issues. vs Using may cause buffer overflows, as it does not account for NULL characters. It is recommended to use to limit string length. Code Example Why This Vulnerability is Interesting? The vulnerability exploits Lua code injection into session files, allowing attackers to trigger code execution by crafting malicious input. Example code demonstrates how specific inputs can bypass security checks and execute arbitrary code. Lua Code Injection into Session Files Attackers can inject malicious Lua code into session files; when the server parses these files, the malicious code is executed. Triggering Code Injection By sending specially formatted packets, attackers can trigger code injection, leading to arbitrary command execution on the server. Update: User Password Disclosure (CVE-2025-78089) Another related vulnerability allows attackers to disclose user passwords, further increasing the attack risk. Two Other Vulnerabilities Affecting Wing FTP Server Two additional minor vulnerabilities are mentioned, but not detailed. Mitigation Measures It is recommended to upgrade to the latest version of Wing FTP Server to fix these vulnerabilities. Developers should carefully review code, avoid unsafe string handling functions, and ensure proper handling of special characters. ``` These key points summarize the core aspects of the Wing FTP Server RCE vulnerability, including its cause, impact, exploitation methods, and remediation recommendations.

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Wing FTP Server RCE Analysis (CVE-2025-41812)