module

Klog Server authenticate.php user Unauthenticated Command Injection

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Disclosed
2020-12-27
Created
2021-02-13

Description

This module exploits an unauthenticated command injection vulnerability
in Klog Server versions 2.4.1 and prior.

The `authenticate.php` file uses the `user` HTTP POST parameter in a call
to the `shell_exec()` PHP function without appropriate input validation,
allowing arbitrary command execution as the apache user.

The sudo configuration permits the apache user to execute any command
as root without providing a password, resulting in privileged command
execution as root.

This module has been successfully tested on Klog Server version 2.4.1
virtual appliance.

Authors

b3kc4t
Metin Yunus Kandemir
bcoles bcoles@gmail.com

Platform

Linux,Unix

References

Module Options

To display the available options, load the module within the Metasploit console and run the commands ‘show options’ or ‘show advanced’:


    msf > use exploit/linux/http/klog_server_authenticate_user_unauth_command_injection
    msf exploit(klog_server_authenticate_user_unauth_command_injection) > show targets
        ...targets...
    msf exploit(klog_server_authenticate_user_unauth_command_injection) > set TARGET < target-id >
    msf exploit(klog_server_authenticate_user_unauth_command_injection) > show options
        ...show and set options...
    msf exploit(klog_server_authenticate_user_unauth_command_injection) > exploit
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