Article: Attacking JWT authentication.
Demo pages:
Attacks:
- Change the algorithm from HS256 to none.
- Change the algorithm from RS256 to HS256, and use the public key as the secret key for the HMAC.
- Crack the HMAC key using John the Ripper.
Practice hacking JWT tokens
Home Page: https://www.sjoerdlangkemper.nl/2016/09/28/attacking-jwt-authentication/
Article: Attacking JWT authentication.
Demo pages:
Attacks:
ecro0@MN-C02YF0MJJG5L ~ % git clone https://github.com/Sjord/jwtdemo.git
Cloning into 'jwtdemo'...
remote: Enumerating objects: 42, done.
remote: Counting objects: 100% (3/3), done.
remote: Compressing objects: 100% (3/3), done.
remote: Total 42 (delta 0), reused 1 (delta 0), pack-reused 39
Unpacking objects: 100% (42/42), done.
ecro0@MN-C02YF0MJJG5L ~ % cd jwtdemo
ecro0@MN-C02YF0MJJG5L jwtdemo % ls
FirebaseRS256.php common.php private.pem
MishalHS256.php composer.json public.pem
README.md composer.lock publickeyhs256.php
base.php hs256.php rs256.php
ecro0@MN-C02YF0MJJG5L jwtdemo % php publickeyhs256.php
Warning: require(/Users/ecro0/jwtdemo/vendor/autoload.php): failed to open stream: No such file or directory in /Users/ecro0/jwtdemo/publickeyhs256.php on line 2
Fatal error: require(): Failed opening required '/Users/ecro0/jwtdemo/vendor/autoload.php' (include_path='.:') in /Users/ecro0/jwtdemo/publickeyhs256.php on line 2
Hi everyone, I have a problem in hosting the site locally because having downloaded everything and installed on the composer the written versions of the two "libraries" and trying to host the site with the command "php" version 8.2.9 the vulnerability does not work i.e. when I try to create a jwt token with the public key and with the HS256 algorithm it tells me that it is invalid does anyone know why? Thanks in advance
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