module

Nginx HTTP Server 1.3.9-1.4.0 Chunked Encoding Stack Buffer Overflow

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Disclosed
2013-05-07
Created
2018-05-30

Description

This module exploits a stack buffer overflow in versions 1.3.9 to 1.4.0 of nginx.
The exploit first triggers an integer overflow in the ngx_http_parse_chunked() by
supplying an overly long hex value as chunked block size. This value is later used
when determining the number of bytes to read into a stack buffer, thus the overflow
becomes possible.

Authors

Greg MacManus
hal
saelo

Platform

Unix

Architectures

cmd

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