VETH VirtualToken Lending Mechanism Price Logic Error

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Ethereum Foundation

vETH is lending contract token with a loan control mechanism which is part of an unknown project on Ethereum. On November 14th, the smart contract was exploited which allowed for cheaper minting of vETH tokens. There is no word on any intended recovery of the funds or reimbursment for affected users.

About VirtualToken

"The vETH token (VirtualToken) is an ERC-20 token designed to facilitate token lending, wrapping, and unwrapping functionalities. It features a controlled loan mechanism, allowing only authorized factory contracts to call its takeLoanfunction and manage user debt. The token also integrates access control through a whitelist and factory mechanism, ensuring that interactions are limited to approved entities."

The Reality

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• When the service was actually started (if different than the "official story").
• Who actually ran a service and their own personal history.
• How the service was structured behind the scenes. (For example, there was no "trading bot".)
• Details of what audits reported and how vulnerabilities were missed during auditing.

What Happened

"The vETH token suffered an attack, resulting in approximately $450K in losses." "On November 14, 2024, the vETH token was exploited due to a business logic error in its lending mechanism. This exploit resulted in a loss of approximately $450k USD."

Key Event Timeline - vETH VirtualToken Lending Mechanism Price Logic Error

Date	Event	Description
October 27th, 2024 3:08:11 AM MDT	VirtualToken Created	The VirtualToken smart contract is first created/launched on the Ethereum smart chain.
November 14th, 2024 12:37:47 AM MST	Loading Exploiter Wallet With Ethereum	Exploiter transfers some ethereum to their wallet for use with the exploit.
November 14th, 2024 1:35:47 AM MST	Attack Transaction	One of the attack transactions, according to Coinmonks.
November 14th, 2024 1:36:59 AM MST	Attack Transaction	One of the attack transactions, according to Coinmonks.
November 14th, 2024 1:39:23 AM MST	Attack Transaction	One of the attack transactions, according to Coinmonks.
November 14th, 2024 1:56:59 AM MST	Exploit Transaction	The price manipulation exploit occurs on the Ethereum smart chain.
November 14th, 2024 2:10:00 AM MST	SlowMist Posts Tweet	SlowMist posts a tweet about the suspicious activity on the vETH token/protocol.

Technical Details

"The attack targeted interactions between the vETH token’s takeLoan function and a liquidity-adding function in the Factory contract, which manipulates the state of Uniswap pairs. The attacker leveraged this flaw to acquire vETH tokens without incurring the intended cost."

"The root cause of the hack was a flawed interaction between the takeLoan function in the vETH contract and the liquidity-adding function in the Factory contract. This function allowed state manipulation of Uniswap pools, enabling the attacker to inflate the pool's constant product and mint vETH without proper cost."

Total Amount Lost

The total amount lost has been estimated at $450,000 USD.

How much was lost and how was it calculated? If there are conflicting reports, which are accurate and where does the discrepancy lie?

Immediate Reactions

How did the various parties involved (firm, platform, management, and/or affected individual(s)) deal with the events? Were services shut down? Were announcements made? Were groups formed?

Ultimate Outcome

What was the end result? Was any investigation done? Were any individuals prosecuted? Was there a lawsuit? Was any tracing done?

Total Amount Recovered

There do not appear to have been any funds recovered in this case.

What funds were recovered? What funds were reimbursed for those affected users?

Ongoing Developments

What parts of this case are still remaining to be concluded?

Individual Prevention Policies

No specific policies for individual prevention have yet been identified in this case.

For the full list of how to protect your funds as an individual, check our Prevention Policies for Individuals guide.

Platform Prevention Policies

Policies for platforms to take to prevent this situation have not yet been selected in this case.

For the full list of how to protect your funds as a financial service, check our Prevention Policies for Platforms guide.

Regulatory Prevention Policies

No specific regulatory policies have yet been identified in this case.

For the full list of regulatory policies that can prevent loss, check our Prevention Policies for Regulators guide.