Description
This module exploits CVE-2021-31166, a UAF bug in http.sys when parsing specially crafted Accept-Encoding headers that was patched by Microsoft in May 2021, on vulnerable IIS servers. Successful exploitation will result in the target computer BSOD'ing before subsequently rebooting. Note that the target IIS server may or may not come back up, this depends on the target's settings as to whether IIS is configured to start on reboot.
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 auxiliary/dos/windows/http/http/sys_accept_encoding_dos_cve_2021_31166msf undefined(sys_accept_encoding_dos_cve_2021_31166) > show actions ...actions...msf undefined(sys_accept_encoding_dos_cve_2021_31166) > set ACTION < action-name >msf undefined(sys_accept_encoding_dos_cve_2021_31166) > show options ...show and set options...msf undefined(sys_accept_encoding_dos_cve_2021_31166) > runPrioritise with Active Threat Intelligence
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