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ID:

pancakeswap-1135

Date:

Status:

Incident Count:

April 27, 2021

Near-Miss

5

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REKT

Contributor:

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web3rekt.com

KYC By:

KYC:

None

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Audit By:

Audits:

PeckShield, Slowmist

Loss Amount:

-

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Recovered:

-

Rewards:

72,700

Currency:

USD

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Key Indicators

Platform:

Type:

Category:

Method:

Data Sources:

Binance Smart Chain

Protocol

Dexes

Rewards - Bug Bounties

Extended Method:

Lack of validation on previously claimed ticket, allowing multiple claims on the same ticket

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Days in Operation:

732

(2.01 Years)

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Whitehat Juno submitted a critical vulnerability in PancakeSwap’s lottery contract to Immunefi. The vulnerability consisted of a logic error. Due to insufficient validation, a malicious user could have claimed the same winning ticket at least 255 times in a single transaction, meaning the reward size was 255 times too great. A total of $700,000 in funds could have been lost, had the vulnerability been exploited.

ApeSwap, PantherSwap, and Knights DeFi were vulnerable. All three decided to pay a bounty to the whitehat as well. PancakeSwap paid $70,000 in CAKE tokens. ApeSwap paid $2,700. PantherSwap paid 10,290 PANTHER tokens. Knights DeFi paid 7,000 KNIGHT tokens.

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