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PHPMailer Sendmail Argument Injection

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PHPMailer Sendmail Argument Injection

Disclosed
12/26/2016
Created
05/30/2018

Description

PHPMailer versions up to and including 5.2.19 are affected by a vulnerability which can be leveraged by an attacker to write a file with partially controlled contents to an arbitrary location through injection of arguments that are passed to the sendmail binary. This module writes a payload to the web root of the webserver before then executing it with an HTTP request. The user running PHPMailer must have write access to the specified WEB_ROOT directory and successful exploitation can take a few minutes.

Author(s)

  • Dawid Golunski
  • Spencer McIntyre

Platform

PHP

Architectures

php

Development

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/multi/http/phpmailer_arg_injection
msf exploit(phpmailer_arg_injection) > show targets
    ...targets...
msf exploit(phpmailer_arg_injection) > set TARGET < target-id >
msf exploit(phpmailer_arg_injection) > show options
    ...show and set options...
msf exploit(phpmailer_arg_injection) > exploit

Time is precious, so I don’t want to do something manually that I can automate. Leveraging the Metasploit Framework when automating any task keeps us from having to re-create the wheel as we can use the existing libraries and focus our efforts where it matters.

– Jim O’Gorman | President, Offensive Security

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