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ImageMagick Delegate Arbitrary Command Execution

This module exploits a shell command injection in the way "delegates" (commands for converting files) are processed in ImageMagick versions <= 7.0.1-0 and <= 6.9.3-9 (legacy). Since ImageMagick uses file magic to detect file format, you can create a .png (for example) which is actually a crafted SVG (for example) that triggers the command injection. The PostScript (PS) target leverages a Ghostscript -dSAFER bypass (discovered by taviso) to achieve RCE in the Ghostscript delegate. Ghostscript versions 9.18 and later are affected. If USE_POPEN is set to true, a |-prefixed command will be used for the exploit. No delegates are involved in this exploitation.

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Module Name

exploit/unix/fileformat/imagemagick_delegate

Authors

  • stewie
  • Nikolay Ermishkin
  • wvu <wvu [at] metasploit.com>
  • hdm <x [at] hdm.io>

References

Targets

  • SVG file
  • MVG file
  • PS file

Platforms

  • unix

Architectures

  • cmd

Reliability

Development

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/unix/fileformat/imagemagick_delegate msf exploit(imagemagick_delegate) > show targets ...targets... msf exploit(imagemagick_delegate) > set TARGET <target-id> msf exploit(imagemagick_delegate) > show options ...show and set options... msf exploit(imagemagick_delegate) > exploit

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