The Ethereum Bounty Program provides bounties for bugs. We call on our community and all bug bounty hunters to help identify bugs in the protocols and clients. Earn rewards for finding a vulnerability and get a place on our leaderboard. See Rules & Rewards section for details.
Martin Holst Swende
Please have a look at the bullets below before starting your hunt!
The value of rewards paid out will vary depending on Severity. The severity is calculated according to the OWASP risk rating model based on Impact and Likelihood :
Reward sizes are guided by the rules below, but are in the end, determined at the sole discretion of the Ethereum Foundation bug bounty panel.
1 point currently corresponds to 1 USD (payable in ETH or BTC), something which may change without prior notice.
OBS! Between 2017-09-19 and Byzantium hard-fork on Mainnet, each point corresponds to 2 USD for issues related to cross-client consensus or geth DoS vulnerabilities.
Beyond monetary rewards, every bounty is also eligible for listing on our leaderboard with points accumulating over the course of the program.
In addition to Severity, other variables are also considered when the Ethereum Foundation bug bounty panel decides the score, including (but not limited to):
Important Legal Information
The bug bounty program is an experimental and discretionary rewards program for our active Ethereum community to encourage and reward those who are helping to improve the platform. It is not a competition. You should know that we can cancel the program at any time, and awards are at the sole discretion of Ethereum Foundation bug bounty panel. In addition, we are not able to issue awards to individuals who are on sanctions lists or who are in countries on sanctions lists (e.g. North Korea, Iran, etc). You are responsible for all taxes. All awards are subject to applicable law. Finally, your testing must not violate any law or compromise any data that is not yours.
Our bug bounty program spans end-to-end: from soundness of protocols (such as the blockchain consensus model, the wire and p2p protocols, proof of work, etc) and protocol/implementation compliance to network security and consensus integrity. Classical client security as well as security of cryptographic primitives are also part of the program. Details on the scope follow:
The idea for Ethereum was initially published in the White Paper. This concept has been realized in a few protocols and algorithms up for scrutiny:
Help identify flaws such as ones found in the yellow paper, relating to:
Assuming that the protocols and algorithms are flawless, does a client implementation conform to the formal protocol specification? Issues could include:
An example of a potential issue in this category is Bitcoin’s “zero-day” flaw, which required a hard-fork.
This category focuses on generalized attacks on the whole network or a subset of it:
Here is an example from bitcoin of a global network based DoS scenario.
Attacks on a single Go client relating to the Ethereum protocol:
This category addresses more classical security issues:
Here is an example of a problem hidden in an external library.
This category includes:
This category includes:
Here is an example of a submitted Solidity bug.
This category includes:
Here is an example of a bug in the initial ENS registrar that would have allowed people to bid during the reveal period, thus affecting the legitimacy of auction results.
Here is an example of a real issue which was previously present in the Go client:
Description: Remote Denial-of-service using non-validated blocks
Attack scenario: An attacker can send blocks that may require a high amount of computation (the maximum gasLimit) but has no proof-of-work. If the attacker sends blocks continuously, the attacker may force the victim node to 100% CPU utilization.
Impact: An attacker can abuse CPU utilization on remote nodes, possibly causing full DoS.
Components: Go client version v0.6.8
Reproduction: Send a block to a Go node that contains many txs but no valid PoW.
Details: Blocks are validated in the method
Process(Block, dontReact). This method performs expensive CPU-intensive tasks, such as executing transactions (
sm.ApplyDiff) and afterward it verifies the proof-of-work (
sm.ValidateBlock()). This allows an attacker to send blocks that may require a high amount of computation (the maximum
gasLimit) but has no proof-of-work. If the attacker sends blocks continuously, the attacker may force the victim node to 100% CPU utilization.
Fix: Invert the order of the checks.
No end date is currently set. See the “News & Updates” section above, and the Ethereum blog for the latest news.
Rewards are paid out in ETH or BTC after the submission has been validated, usually a few days later. Local laws require us to ask for proof of your identity. In addition, we will need your ETH/BTC address.
Yes. We can donate your reward to an established charitable organization of your choice.
We aim to respond to submissions as fast as possible. Feel free to email us if you have not received a response within a day or two.
Submitting anonymously or with a pseudonym is OK, but will make you ineligible for BTC rewards. To be eligible for BTC rewards, we require your real name and a proof of your identity. Donating your bounty to a charity doesn’t require your identity.
Please let us know if you do not want your name/nick displayed on the leader board.
Every found vulnerability / issue is assigned a score. Bounty hunters are ranked on our leaderboard by total points.
Email us at email@example.com.
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