Cybercriminals Using Telekopye Telegram Bot to Craft Phishing Scams on a Grand Scale

More details have emerged about a malicious Telegram bot called Telekopye that's used by threat actors to pull off large-scale phishing scams. "Telekopye can craft phishing websites, emails, SMS messages, and more," ESET security researcher Radek Jizba said in a new analysis. The threat actors...

Winner of auction status is not set to false after claim so eligible for refund

Lines of code Vulnerability details Impact Bidders funds will get stuck Proof of Concept After Auction winner claims token, his/her status is not set to false so he is eligible for a refund because the refund logic checks for all indexes with status set to true, which not supposed to be so. So th...

Last token of maximum supply can be paid, but it isn't minted nor reverted.

Lines of code Vulnerability details Description collectionCirculationSupply is incremented in each mint and it's used to check if the mint don't overtakes the collection's max supply. However, it increments before the check, which makes that although last token is in the max supply range, the...

Re-enterancy in AuctionDemo contract

Lines of code Vulnerability details Impact claimAuction function of AuctionDemo contract transfers the token to highest bidder winner and the bid amount is transferred to the owner. Moreover, refund is sent to all remaining participants non-winners of the auction via call function. However, if a...

In some cases the crowdfund cant be finalized because the minContribution amount check is after the amount is reduced

Lines of code Vulnerability details Because of a finding in the previous contest, the minContribution check is done after the amount is potentially reduced if refunding excess contribution. However this can be a problem if the maxTotalContributions - minTotalContributions is smaller than the...

Fund Drainage Due to Reentrancy Vulnerability in Crowdfunding

Lines of code Vulnerability details Impact in the refund function, there is a problem, this function is reads the isAuthority state variable from the PartyGovernanceNFT contract after making an external call to the burn function of the same contract. The burn function in the PartyGovernanceNFT...

Users can lose eth when contributing.

Lines of code Vulnerability details Impact When contributing in InitialETHCrowdfund, if minting adjusts the voting power for that user to cap it at totalVotingPower, the user does not get refunded the eth he lost. Proof of Concept PartyGovernanceNFTmint caps the mintedVotingPower at...

User can selectively turn on the fallback flag to take all ETH on the agent contract as layerzero fee refund

Lines of code Vulnerability details Impact performFallbackCall can revert sliently when refundee is not capable of taking ETH refund from layerzero side Proof of Concept In RootBridgeAgent.sol when the has fall back toggle flag is on, the smart contract aim to perform a fallback call to notify th...

RangeManager.initRange does not refund leftover underlying assets to the contract owner

Lines of code Vulnerability details Impact The initRange function in the RangeManager contract has a vulnerability where leftover underlying assets from the tokenizable range are not properly refunded to the contract owner. This can lead to a situation where the owner's funds are stuck in the...

[H] Users can lose their funds if the transaction reverts on destination chain

Lines of code Vulnerability details Impact The transmitSendToken function in the contract facilitates cross-chain token transfers. For contracts involving ERC20 tokens it is also expected that, should a contract call fail, one's tokens are not lost/transferred elsewhere. However, the function doe...

All co-signers pay during executeMultisigProposal

Lines of code Vulnerability details Impact The executeMultisigProposal will receive payment from all cosigners when only one payment of nativeValue amount is required. Proof of Concept The executeMultisigProposal requires native payment and therefore requires the caller to pay an amount equivalen...

Revolut Faces $20 Million Loss as Attackers Exploit Payment System Weakness

Malicious actors exploited an unknown flaw in Revolut's payment systems to steal more than $20 million of the company's funds in early 2022. The development was reported by the Financial Times, citing multiple unnamed sources with knowledge of the incident. The breach has not been disclosed...

Loss of user funds due to gas Limit set to zero on L2StandardBridge

Lines of code Vulnerability details Impact User loss of funds in the event a deposit fails. Proof of Concept In L2StandardBridge.finalizeDeposit, there exists an issue related to the gas limit setting. In the event of a failed transfer, it attempts to create a return transaction to refund the use...

Borrower can block being defaulted or auctioned

Lines of code Vulnerability details Borrower can block being defaulted or auctioned The borrower can potentially block the liquidation and auction processed by using a contract and reverting on ETH transfers. Impact When a loan is being liquidated or auctioned, any credit still available to the...

High Reentrancy Withdrawals can be frontrun

Lines of code Vulnerability details Impact A reentrancy attack on the withdrawal functions could allow an attacker to drain the contract of all funds by repeatedly calling the functions faster than transactions can complete. By calling completeQueuedWithdrawal and withdrawBeaconChainETH multiple...

Woman tracks down and turns table on Airbnb scammer

The internet is full of Airbnb scams and accounts told by victims. But there is a twist in this latest story-gone-viral that is usually lacking in most narratives: The victim evens the score. Airbnb host and scammer "Mr. Tyler" met his match when his would-be guest, TikTok user Olivia @livvoogus,...

InitialETHCrowdfund.batchContributeFor() doesn't refund for failed contributes

Lines of code Vulnerability details Impact InitialETHCrowdfund.batchContributeFor doesn't refund for failed contributes when args.revertOnFailure is false. The funds will be locked in the initial crowdfund contract, so it should be refunded. Proof of Concept InitialETHCrowdfund.batchContributeFor...

ETHCrowdfundBase#_calculateRefundAmount can return too many funds to users and brick refunds

Lines of code Vulnerability details Impact Malicious user can honeypot and grief users causing loss of funds Proof of Concept ETHCrowdfundBase.solL227-L230 if fundingSplitRecipient != address0 && fundingSplitBps 0 uint96 feeAmount = amount fundingSplitBps / 1e4; amount -= feeAmount; When a user...

OperatorProposal._executeOperation() should refund excess ETH

Lines of code Vulnerability details Impact There are excess ETH in OperatorProposal.executeOperation, and it should be refunded. Proof of Concept OperatorProposal.executeOperation runs data.operator.execute with data.operatorValue of ETH. data.operator.execute value: data.operatorValue...

if revertOnFailure is set to false, batchContributeFor doesn't refund properly

Lines of code Vulnerability details Proof of Concept Consider the code for batchContributeFor: function batchContributeFor BatchContributeForArgs calldata args external payable onlyDelegateCall returns uint96 memory votingPowers uint256 numContributions = args.recipients.length; votingPowers = ne...