ether.fi’s codebase can be found at https://github.com/etherfi-protocol. Documentation and further resources can be found on https://etherfi.gitbook.io/etherfi.

ether.fi is a decentralized, non-custodial delegated staking protocol with a Liquid Staking token. One of the distinguishing characteristics of ether.fi is that stakers control their keys. The ether.fi mechanism also allows for the creation of a node services marketplace where stakers and node operators can enroll nodes to provide infrastructure services.

Direct theft of any user funds, whether at-rest or in-motion, other than unclaimed yield

Direct theft of any user NFTs, whether at-rest or in-motion, other than unclaimed royalties

Permanent freezing of funds

Protocol permanent insolvency

Execute arbitrary system commands

Retrieve sensitive data/files from a running server, such as:   /etc/shadow, database passwords, blockchain keys (this does not include non-sensitive environment variables, open source code, or usernames)

Taking down the application/website

Taking state-modifying authenticated actions (with or without blockchain state interaction) on behalf of other users without any interaction by that user, such as:   Changing registration information, Commenting, Voting, Making trades, Withdrawals, etc.

Subdomain takeover with already-connected wallet interaction

Direct theft of user funds

Malicious interactions with an already-connected wallet, such as:  Modifying transaction arguments or parameters, Substituting contract addresses, Submitting malicious transactions

Injection of malicious HTML or XSS through metadata

Manipulation of on-chain governance voting result deviating from voted outcome and resulting in a direct change from intended effect of original results

Theft of material unclaimed yield

Permanent freezing of material unclaimed yield

Permanent freezing of material unclaimed royalties

Injecting/modifying the static content on the target application without JavaScript (persistent), such as:  HTML injection without JavaScript, Replacing existing text with arbitrary text, Arbitrary file uploads, etc

Changing sensitive details of other users (including modifying browser local storage) without already-connected wallet interaction and with up to one click of user interaction, such as:  Email, Password of the victim etc.

Improperly disclosing confidential user information, such as:  Email address, Phone number, Physical address, etc.

Subdomain takeover without already-connected wallet interaction

Temporary freezing of material funds

Smart contract unable to operate due to lack of token funds

Redirecting users to malicious websites (open redirect)

Block stuffing that results in material freezing or loss of funds or significantly impedes the operation of the protocol

Griefing (e.g. no profit motive for an attacker, but damage to the users or the protocol) that results in material freezing or loss of funds or significantly impedes operation of the protocol

Theft of gas

Unbounded gas consumption

Contract fails to deliver promised returns, but doesn't lose value

Injecting/modifying the static content on the target application without JavaScript (reflected), such as:  Reflected HTML injection, Loading external site data

Changing non-sensitive details of other users (including modifying browser local storage) without already-connected wallet interaction and with up to one click of user interaction, such as:  Changing the name of user, Enabling/disabling notifications

Changing details of other users (including modifying browser local storage) without already-connected wallet interaction and with significant user interaction, such as:  Iframing leading to modifying the backend/browser state (demonstrate impact with PoC)

Taking over broken or expired outgoing links, such as:  Social media handles, etc.

Temporarily disabling user to access target site, such as:  Locking up the victim from login, Cookie bombing, etc.

Rewards are distributed according to the impact of the vulnerability based on the [Immunefi Vulnerability Severity Classification System V2.3. ](https://immunefi.com/immunefi-vulnerability-severity-classification-system-v2-3/)

__Reward Calculation for Critical Level Reports__

For critical smart contract bugs, the reward amount is 10% of the funds directly affected up to a maximum of USD 200 000. The calculation of the amount of funds at risk is based on the time and date the bug report is submitted. However, a minimum reward of USD USD 10 000 is to be rewarded in order to incentivize security researchers against withholding a critical bug report.

Permanent freezing of funds impact

- Funds affected > 3% is considered a critical severity bug
- Funds affected > 0.5% but < 3%  is considered a high severity bug
- Anything below 0.5% is considered a medium severity bug

Protocol permanent insolvency impact

- If the bug affects > 3% of the debt/collateral, it is considered a critical severity bug
- If the bug affects  > 0.5% but < 3% of the debt/collateral, it is considered a high severity bug
- Anything below 0.5% is considered a medium severity bug


__Repeatable Attack Limitations__

If the smart contract where the vulnerability exists can be upgraded or paused, only the initial attack will be considered for a reward. This is because the project can mitigate the risk of further exploitation by upgrading or pausing the component where the vulnerability exists. The reward amount will depend on the severity of the impact and the funds at risk. 

For critical repeatable attacks on smart contracts that cannot be upgraded or paused, the project will consider the cumulative impact of the repeatable attacks for a reward. This is because the project cannot prevent the attacker from repeatedly exploiting the vulnerability until all funds are drained and/or other irreversible damage is done. Therefore, this warrants a reward equivalent to 10% of funds at risk, capped at the maximum critical reward. 

__Reward Calculation for High Level Reports__

High vulnerabilities concerning theft/permanent freezing of unclaimed yield/royalties are rewarded within a range of USD 3 000 to USD 10 000 depending on the funds at risk, capped at the maximum high reward.  


In the event of temporary freezing, the reward doubles from the full frozen value for every additional [24h] that the funds are temporarily frozen, up until a max cap of the high reward. This is because as the duration of the freezing lengthens, the potential for greater damage and subsequent reputational harm intensifies. Thus, by increasing the reward proportionally with the frozen duration, the project ensures stronger incentives for bug disclosure of this nature.

__Reward Calculation for Medium Level Reports__

Medium vulnerabilities concerning theft/temporary freezing of unclaimed yield/royalties are rewarded within a range of USD 1 500 to USD 3 000 depending on the funds at risk, depth of the analysis, capped at the maximum high reward.  

For critical web/apps bug reports will be rewarded with USD 15 000, only if the impact leads to:

- A loss of funds involving an attack that does not require any user action
- Private key or private key generation leakage leading to unauthorized access to user funds 

All other impacts that would be classified as Critical would be rewarded a flat amount of USD 5 000. The rest of the severity levels are paid out according to the Impact in Scope table.  

__Reward Payment Terms__

Payouts are handled by the ether.fi team directly and are denominated in USD. However, payments are done in USDC on Ethereum

The calculation of the net amount rewarded is based on the average price between CoinMarketCap.com and CoinGecko.com at the time the bug report was submitted. No adjustments are made based on liquidity availability.

Ether.fi

Resources & Documentation