module

Apache Struts 2 Forced Multi OGNL Evaluation

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Disclosed
2020-09-14
Created
2020-12-24

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.

Authors

Spencer McIntyre
Matthias Kaiser
Alvaro Muñoz
ka1n4t

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/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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