An EVM symbolic execution tool and vulnerability scanner
Project description
Pakala
"ilo Pakala li pakala e mani sona"
- Pakala is a tool to search for exploitable bugs in Ethereum smart contracts.
- Pakala is a symbolic execution engine for the Ethereum Virtual Machine.
The intended public for the tool are security researchers interested by Ethereum / the EVM.
Installation
pip3 install pakala
It works only with python 3.
Usage
Let's look at 0x612f1BDbe93523b7f5036EfA87493B76341726E3: the constructor doesn't have the same name as the contract. Anybody can call HT() and become owner, then call withdraw.
Let's scan it:
./pakala.py 0x612f1BDbe93523b7f5036EfA87493B76341726E3 --force-balance="1 ether"
The contract balance being 0, we won't be able to have it send us some ethers. So we override the balance to be 1 ETH: then it has some "virtual" money to send us.
The tool with tell you a bug was found, and dump you a path of "states". Each state corresponds to a transaction, with constraints that needs to be respected for that code path to be taken, storage that has been read/written...
Advice: look at calldata[0] in the constraints to see the function signature for each transaction.
See ./pakala.py help for more complete usage information.
How does it works? What does it do?
See the introductory article for more information and a demo.
Release history Release notifications | RSS feed
Download files
Download the file for your platform. If you're not sure which to choose, learn more about installing packages.
Source Distribution
Built Distribution
File details
Details for the file pakala-1.0.8.tar.gz.
File metadata
- Download URL: pakala-1.0.8.tar.gz
- Upload date:
- Size: 29.9 kB
- Tags: Source
- Uploaded using Trusted Publishing? No
- Uploaded via: twine/1.12.1 pkginfo/1.4.2 requests/2.20.1 setuptools/40.6.3 requests-toolbelt/0.8.0 tqdm/4.28.1 CPython/3.7.1
File hashes
| Algorithm | Hash digest | |
|---|---|---|
| SHA256 | 4ba176957c21be38eee020fee97feea9ddb2d29fd6445b6c76053ebb608d3f2e |
|
| MD5 | f88e4ee56f5ad6b658b86da97cba85cd |
|
| BLAKE2b-256 | 75e8506659fc282c7e5dd0a480b6ba48c223b0d9f0dee4623eef43e48714c847 |
File details
Details for the file pakala-1.0.8-py3-none-any.whl.
File metadata
- Download URL: pakala-1.0.8-py3-none-any.whl
- Upload date:
- Size: 35.5 kB
- Tags: Python 3
- Uploaded using Trusted Publishing? No
- Uploaded via: twine/1.12.1 pkginfo/1.4.2 requests/2.20.1 setuptools/40.6.3 requests-toolbelt/0.8.0 tqdm/4.28.1 CPython/3.7.1
File hashes
| Algorithm | Hash digest | |
|---|---|---|
| SHA256 | 907f09d9e83ebf15316b830258ba4291c0e1f7a670b05a8246f4a55843f437ce |
|
| MD5 | 661ef09bc37f6946a2094c1846519a2e |
|
| BLAKE2b-256 | 5b537cd8e865e9a25d12038c5b289e612d4397d04fc483001317ee464a9298d6 |
