Name: Local File Inclusion (LFI) Scanner

Local File Inclusion (LFI) Scanner is used to identify possible LFI vulnerabilities within web applications. Developers, security analysts, and penetration testers utilize this tool to uncover and remediate insecure file processing in their applications. Local File Inclusion is typically exploited in web environments where input is insufficiently sanitized. This vulnerability is relevant across various industries where sensitive information needs to be protected from unauthorized access. Using the scanner helps organizations meet security standards and mitigate risks associated with improperly handled files.

Local File Inclusion allows attackers to include files on a server through the web browser. It provides unauthorized access to sensitive server files when user input is not adequately validated. This vulnerability is commonly found in applications where user-supplied data affects file inclusion mechanisms without proper security checks. Attackers can traverse directories and access critical files through relative paths. LFI vulnerabilities can occur on both UNIX/Linux and Windows systems, often posing significant security risks. When exploited, it can lead to further system compromise if combined with other vulnerabilities.

Technical details about the LFI vulnerability center around the manipulation of server page requests. Vulnerable endpoints often include a parameter that allows file path inputs, such as "file," "document," or "page." Attackers insert traversal sequences like "../../" within these parameters to gain access to sensitive files in directories. The system's improper handling of such sequences results in exposure of critical server files, such as /etc/passwd or Windows configuration files. The scanner identifies these patterns through extensive fuzzing techniques and regular expressions to match sensitive content. Additionally, various encoding methods are used to bypass weak security filters.

If exploited, Local File Inclusion vulnerabilities can allow attackers to access sensitive files containing confidential data or server configurations. These vulnerabilities can lead to information disclosure, file modification, and sometimes remote code execution if write access to specific files is possible. LFI can be a stepping stone for further attacks like cross-site scripting or privilege escalation. In worst cases, attackers may launch entire application or server takeovers. When the file inclusion flaw is combined with other security misconfigurations, it grants attackers broader capabilities over compromised systems.

REFERENCES

• https://owasp.org/www-community/attacks/Unicode_Encoding