How much was lost in the Dot Finance hack?

The Dot Finance hack resulted in $430K in losses on August 25, 2021.

What attack technique was used in the Dot Finance exploit?

The Dot Finance exploit utilized Other. Understanding this attack vector is critical for smart contract auditors and developers building secure DeFi protocols.

How can developers prevent similar smart contract attacks?

Preventing smart contract hacks requires a combination of secure coding practices, thorough security audits, and understanding common attack vectors like reentrancy, oracle manipulation, and access control flaws. Smart Contract Hacking (SCH) provides hands-on training to help developers and auditors identify and prevent vulnerabilities before deployment.

Dot Finance Hack

TOTAL LOST $430K

Low Aug 25, 2021 Other

Affected Chain 2021 Incident surface

Recovered - No recovery reported

All-Time Rank #1054 By amount stolen

Protocol Type Derivatives Target category

Incident Overview

Team announcement:

"Someone took advantage of an opening that was set in our contracts in preparation for a future PINK farm on PancakeSwap.

The user deposited CAKE tokens and made the system believe the farm existed. The deposited tokens was mistaken by the vault as yield which was rewarded back to him as PINK tokens when he withdraw his funds.

By the time we disabled all of our contracts, this person had managed to withdraw tokens, which he later on sold on the market.

Dot Finance Team identified the configuration exploit and enabled our contracts for complete operational form.

There was no need to upload new contracts as there was no breach in contracts.

There was no need to examine the protocol as there was no exploit in our protocol.

We suffered from an exploit in configuration, which is now closed.

These days, our contract is going through a new audit, and we are working on shifting to the Kusma network (an update on that will be published soon).

Dot Finance team knows and understands that these kinds of events can cause stress and uncertainty. We want to emphasize our responsibility for every token deposited on our system and doing our 100% to keep our community funding safe, which we did and will keep doing in the future.

Thank you for the support and understanding and for going back with full force towards our future destination."

Incident Report

Protocol / Project Dot Finance

Date of Incident August 25, 2021

Attack Technique Other

Classification Yield Aggregator

Primary Source View Post-Mortem

Protocol Information

Protocol Type Derivatives

Affected Token PINK

Official Website dot.finance/

Protocol Twitter/X @dot_finance

Team Public / Doxxed

Source Code Unverified

Market Context at Time of Hack

Token Categories

Moonriver Ecosystem BNB Chain Ecosystem

Protocol Links

GitHub

What the Attacker Needed to Succeed

Understanding the prerequisites for this type of attack helps auditors identify protocols that are most at risk and helps developers build better defenses.

Technical Knowledge Deep understanding of other and Solidity and EVM internals

Capital Required Seed capital to cover gas and initial position setup

On-Chain Access Ability to interact with smart contracts and deploy a custom exploit contract

Protocol Analysis Identification of the exploitable vulnerability in Dot Finance's contract logic - root cause: yield aggregator

Execution Speed Precise transaction ordering and timing to exploit the vulnerability within a single atomic block

Obfuscation Plan A strategy to launder and move stolen funds - typically through mixers, cross-chain bridges, or decentralized DEX swaps to resist tracing

What Auditors Should Check

Could this have been caught in audit? Likely — with a thorough Other audit checklist and test coverage

If you're auditing a protocol with similar architecture to Dot Finance, these are the critical security checks that could have prevented this incident (August 2021).

Verify all logic paths related to Other are guarded by proper access controls and input validation
Review privileged functions (owner, admin, governance) for potential abuse vectors - centralization risks should be documented and bounded with timelocks or multi-sigs

Master these auditing techniques with hands-on labs and real exploit scenarios in the Smart Contract Hacking course.

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Sources & References

01
Source 1 https://t.me/Dot_Finance_ano/126

Threat Assessment

Severity Level

LOW

Attack Vector Other
Root Cause Yield Aggregator
Year 2021

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