MODULE

Apache Struts 2 Forced Multi OGNL Evaluation

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Apache Struts 2 Forced Multi OGNL Evaluation

Disclosed
09/14/2020
Created
12/24/2020

Description

The Apache Struts framework, when forced, performs double evaluation of attributes' values assigned to certain tags attributes such as id. It is therefore possible to pass in a value to Struts that will be evaluated again when a tag's attributes are rendered. With a carefully crafted request, this can lead to Remote Code Execution (RCE). This vulnerability is application dependant. A server side template must make an affected use of request data to render an HTML tag attribute.

Author(s)

  • Spencer McIntyre
  • Matthias Kaiser
  • Alvaro Muñoz
  • ka1n4t

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/multi/http/struts2_multi_eval_ognl
msf exploit(struts2_multi_eval_ognl) > show targets
    ...targets...
msf exploit(struts2_multi_eval_ognl) > set TARGET < target-id >
msf exploit(struts2_multi_eval_ognl) > show options
    ...show and set options...
msf exploit(struts2_multi_eval_ognl) > exploit

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