php on line 7 PHP Wrapper php://fileĪnother PHP wrapper, php://input your payload is sent in a POST request using curl, burp or hackbar to provide the post data is probably the easiest option.
PHP Wrapper expect:// LFIĪllows execution of system commands via the php expect wrapper, unfortunately this is not enabled by default.īelow is the error received if the PHP expect wrapper is disabled: Warning : include () : Unable to find the wrapper "expect" - did you forget to enable it when you configured PHP ? in / var / php on line 7 Warning : include ( expect :// ls ) : failed to open stream : No such file or directory in / var / ) in / var / www / fileincl / example1. Path Traversal aka Directory TraversalĪs mentioned above Traverse the filesystem directory structure to disclose sensitive information about the system that can help you gain a shell, usernames / passwords etc.
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How to get a Shell from LFIīelow are some techniques I’ve used in the past to gain a shell on systems with vulnerable LFI scripts exposed. Note: In some cases, depending on the nature of the LFI vulnerability it’s possible to run system executables. Exposing sensitive information or configuration files containing SQL usernames and passwords. Normally a directory traversal payload is used that escapes the script directory and traverses the filesystem directory structure, exposing sensitive files such as foo.php?file=./././././././etc/passwd or sensitive files within the web application itself. An attacker would simply replace image.jpg and insert a payload. Scripts that take filenames as parameters without sanitizing the user input are good candidates for LFI vulnerabilities, a good example would be the following PHP script foo.php?file=image.jpg which takes image.jpg as a parameter. Typically this is exploited by abusing dynamic file inclusion mechanisms that don’t sanitize user input.
LFI stands for Local File Includes - it’s a file local inclusion vulnerability that allows an attacker to include files that exist on the target web server.
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