WIP: Python: CORS Bypass

[porcupineyhairs]

This PR adds a query to detect a Cross Origin Resource Sharing(CORS) policy bypass due to an incorrect check.

This PR attempts to detect the vulnerability pattern found in CVE-2022-3457

if request.method in ['POST', 'PUT', 'PATCH', 'DELETE']:
    origin = request.headers.get('Origin', None)
    if origin and not origin.startswith(request.base):
        raise cherrypy.HTTPError(403, 'Unexpected Origin header')

In this case, a value obtained from a header is compared using startswith call. This comparision is easily bypassed resulting in a CORS bypass. Given that similar bugs have been found in other languages as well, I think this PR would be a great addition to the exisitng python query pack.

The databases for CVE-2022-3457 can be downloaded from

https://filetransfer.io/data-package/i4Mfepls#link
https://file.io/V67T4SSgmExF

[ghsecuritylab]

Hello porcupineyhairs 👋
You have submitted this pull request as a bug bounty report in the github/securitylab repository and therefore this pull request has been put into draft state to give time for the GitHub Security Lab to assess the PR. When GitHub Security Lab has finished assessing your pull request, it will be marked automatically as Ready for review. Until then, please don't change the draft state.

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• the submission models widely-used frameworks/libraries
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Happy hacking!