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PeckShield
PeckShield

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Aug 15, 2021

PolyNetwork Bug Review And Patch Analysis

[This blog is published with the authorization from PolyNetwork team] Given the opportunity to perform an informal security review of the Pull Request 12 (PR-12) of the eth-contracts repository, we summarize in the report our assessment to evaluate the design goal, expose potential security issues, and examine semantic inconsistencies, if…

Defi

4 min read

PolyNetwork Bug Review And Patch Analysis
PolyNetwork Bug Review And Patch Analysis
Defi

4 min read


Jun 25, 2021

xWin Finance Incident: Root Cause Analysis

Started at Jun-25–2021 12:07:25 AM +UTC, xWin Finance was exploited and the attacker gained about $270k. This incident was due to an invalid slippage control in the protocol, which is exploited in a flashloan to obtain extra xWin rewards. In the following, we elaborate the technical details. Summary This incident was…

Defi

2 min read

xWin Finance Incident: Root Cause Analysis
xWin Finance Incident: Root Cause Analysis
Defi

2 min read


Jun 23, 2021

Eleven Finance Incident: Root Cause Analysis

Started at June-22–2021 22:58:39 +UTC, Eleven Finance was exploited to drain a number of vaults at the loss about $4.6 million. The incident was due to a bug that allows the attacker to withdraw funds without burning any shares. While it appears to be a flashloan attack, it is a…

2 min read

Eleven Finance Incident: Root Cause Analysis
Eleven Finance Incident: Root Cause Analysis

2 min read


May 22, 2021

Bogged Finance Incident: Root Cause Analysis

Started at May-22–2021 02:47:06 PM +UTC, Bogged Finance was exploited to inflate the BOG balance, which is immediately sold to gain about $3.6M. The incident was due to a bug that allows the attacker to increase the balance via self-transfer. While it appears to be a flashloan attack, it is…

Blockchain

2 min read

Bogged Finance Incident: Root Cause Analysis
Bogged Finance Incident: Root Cause Analysis
Blockchain

2 min read


May 20, 2021

PancakeBunny Incident: Root Cause Analysis

Started at May-19–2021 10:34:28 PM +UTC, PancakeBunny was exploited to mint 6.97 million of BUNNY as reward from its vault (VaultFlipToFlip). The incident was due to a bug in the way of measuring the LP price from an AMM-based oracle. It is worthwhile to mention that this attack involves 8…

Defi

3 min read

PancakeBunny Incident: Root Cause Analysis
PancakeBunny Incident: Root Cause Analysis
Defi

3 min read


May 16, 2021

Bearn.Fi Incident: Inconsistent Asset Denomination Between Vault & Strategy

Started at 10:36:20 AM +UTC, May 16, 2021, BearnFi’s BvaultsBank contract was exploited to drain about $11M funds from the pool. The incident was due to a bug in its internal withdraw logic in inconsistently reading the same input amount but with different asset denomination betweenBvaultsBank and the associated strategy…

Security

3 min read

Bearn.Fi Incident: Inconsistent Asset Denomination Between Vault & Strategy
Bearn.Fi Incident: Inconsistent Asset Denomination Between Vault & Strategy
Security

3 min read


May 8, 2021

ValueDeFi Incident: Incorrect Weighted Constant Product Invariant Calculation

[Disclaimer] This analysis is based on the initial finding by @FrankResearcher! Started at 07:41:39 PM +UTC, May 7, 2021, ValueDeFi’s vSwap contract was exploited to drain a number of pools at the loss of about $11M. The incident was due to the improper use of a complex exponentiation power() function…

Defi

3 min read

ValueDeFi Incident: Incorrect Weighted Constant Product Invariant Calculation
ValueDeFi Incident: Incorrect Weighted Constant Product Invariant Calculation
Defi

3 min read


May 2, 2021

The Spartan Incident: Root Cause Analysis

Started at 04:38:39 PM +UTC, May 1, 2021, the Spartan protocol contract was exploited to result in more than $30M loss. The incident was due to a flawed liquidity share calculation in the protocol, which is exploited to drain assets from the pool. …

Defi

3 min read

The Spartan Incident: Root Cause Analysis
The Spartan Incident: Root Cause Analysis
Defi

3 min read


Apr 30, 2021

PeckShield joins forces with Binance Smart Chain ecosystem to strengthen and enhance DeFi security

Beijing, April 30th — PeckShield Inc. (PeckShield), the industry-leading blockchain security company, announced join forces with Binance Smart Chain (BSC) ecosystem to enhance security implementations in a rapidly expanding Decentralized Finance sector. Data shows that both transaction volume and unique active wallets (UAWs) on BSC have risen substantially. Since 2021…

Bsc

3 min read

PeckShield joins forces with Binance Smart Chain ecosystem to strengthen and enhance DeFi security
PeckShield joins forces with Binance Smart Chain ecosystem to strengthen and enhance DeFi security
Bsc

3 min read


Feb 28, 2021

The Furucombo Incident Analysis: Cascading Trust

Started at 16:47:53PM UTC, Feb. 27, 2021, the Furucombo protocol contract was exploited to result in more than $14M loss. The incident was due to a flaw of inappropriate trust in the protocol, which is exploited to cascadingly misuse the allowed spending of this protocol on its users. …

2 min read

2 min read

PeckShield

PeckShield

1.8K Followers

A Blockchain Security Company (https://peckshield.com)

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