IOVLabs: Attacker can add arbitrary data to the blockchain without paying gas

Summary: Due to a missing sanity check in Transaction::rlpParse, an attacker can append arbitrary RLP-encoded data to the end of an otherwise valid transaction, and that data will not only pass through validation, but also be propagated throug the network and mined into a block. Since the block...

SmartMesh Replay Attack Vulnerability

SmartMesh SMT is a blockchain-based underlying protocol for the Internet of Things IoT, positioned in the areas of meshless communication, meshless payment, and more. The 'transferProxy' and 'approveProxy' functions in SMT's smart contract are vulnerable to replay attacks, which can be exploited ...

Safe as houses: 5 security measures adopted by cryptocurrency exchanges

By Waqas Cryptocurrencies rely on the blockchain, a decentralized ledger that records all transactions ever made within it. The blockchain network consists of multiple nodes that maintain it. To gain control over the network and tamper with transaction data a hacker should compromise most of the...

Hacking the Bitfi. Part 2: John McAfee’s video

The unhackable Bitfi story isn't going away any time soon. Following John McAfee's tweet yesterday that he would put out a "definitive video countering all of the nonsense claims instigated and co-coordinated by BirFi's sic established, monolithic competitors in the hardware wallet space" here's ...

KICKICO Hacked: Cybercriminal Steals $7.7 Million from ICO Platform

Again some bad news for cryptocurrency users. KICKICO, a blockchain-based initial coin offering ICO support platform, has fallen victim to a suspected cyber attack and lost more than 70 million KICK tokens or KickCoins worth an estimated $7.7 million. In a statement released on its Medium post on...

ICO hacked: Hackers steal $8 million from KICKICO Blockchain network

By Waqas Another day, another ICO hacked. This time, KICKICO, an Initial Coin Offering ICO project that lets users conduct ICOs, pre-ICOs, crowdfunding and crowdinvesting campaigns have suffered a security breach and as a result, hackers have stolen more than 70 million KickCoins which is around...

What financial service providers should know about blockchain: Opportunities and threats

It seems that every few years, an advanced and innovative new technology emerges and becomes the next big thing for organizations across different industries. Take the cloud and big data, for example - during their buzzword stage, these concepts were being attached to just about everything in the...

How the Rise of Cryptocurrencies Is Shaping the Cyber Crime Landscape: The Growth of Miners

Introduction Cyber criminals tend to favor cryptocurrencies because they provide a certain level of anonymity and can be easily monetized. This interest has increased in recent years, stemming far beyond the desire to simply use cryptocurrencies as a method of payment for illicit tools and...

How the Rise of Cryptocurrencies Is Shaping the Cyber Crime Landscape: The Growth of Miners

Introduction Cyber criminals tend to favor cryptocurrencies because they provide a certain level of anonymity and can be easily monetized. This interest has increased in recent years, stemming far beyond the desire to simply use cryptocurrencies as a method of payment for illicit tools and...

Orbit - Cryptocurrency Wallets Relationship Visualizer

Give it a blockchain based crypto wallet address and it will crawl 3 levels deep in transaction data to plot a graph out of the information. Usage Run orbit.py with python3 as follows python3 orbit.py Enter the wallet address | | | ' | || | | | | Enter a wallet address: xxxxxxxxxxxxxxx Now orbit...

Aurora IDEX Membership(IDXM), ERC20 Token, allows attackers to acquire contract ownership (CVE-2018–10666)

Abstract I found a new vulnerability in smart contract of IDXM Token CVE-2018–106661. Attackers can acquire contract ownership because the setOwner function is delcared as public. A new owner can subsequently bypass intended access restrictions by, for example, calling uploadBalances. Details In...

New ceoAnyone Bug Identified in Multiple Crypto Game Smart Contracts (CVE-2018-11329)

Our vulnerability-scanning system at PeckShield has so far discovered several dangerous smart contract vulnerabilities batchOverflow1, proxyOverflow2, transferFlaw3, ownerAnyone4, multiOverflow5, burnOverflow6. These vulnerabilities typically affect various tokens that may be publicly traded in...

Ransomware and malicious crypto miners in 2016-2018

Ransomware is not an unfamiliar threat. For the last few years it has been affecting the world of cybersecurity, infecting and blocking access to various devices or files and requiring users to pay a ransom usually in Bitcoins or another widely used e-currency, if they want to regain access to...

CVE-2018-12703

The approveAndCallcode function of a smart contract implementation for Block 18 18T, an tradable Ethereum ERC20 token, allows attackers to steal assets e.g., transfer the contract's balances into their account because the callcode i.e., spender.callextraData is not verified, aka the "evilReflex"...

TRON Cryptocurrency Founder Buys BitTorrent, µTorrent for $140 Million

BitTorrent, the company which owns the popular file-sharing client uTorrent, has quietly been sold for $140 million in cash to Justin Sun, the founder of blockchain-focused startup TRON. TRON is a decentralized entertainment and content-sharing platform that uses blockchain and distributed storag...

Don’t Be a Coinmining Zombie – Part 1: Getting Cryptojacked

When your computer or mobile device and now, even your IoT device is hijacked to secretly mine cryptocurrencies, it’s been cryptojacked and becomes a coinmining zombie. Its CPU, memory, disk, and power are enlisted in varying degrees in the service of the mining botnet, which labors on behalf of...

The block chain smart contracts vulnerability, wanted to say your not easy-bug warning-the black bar safety net

In recent days, the block chain platform EOS smart contract vulnerability event once again put on the block chain safe to push on the cusp. An attacker can release contains malicious code“smart contract”, after a series of after the operation, the control block chain, all nodes in the network, an...

Cryptocurrency Mining: Abuse of system resources

Recent advances including digital currencies and the associated public transaction record blockchain have paved the way for an array of new financial activities. Cryptocurrencies like Bitcoin are beginning to be accepted as payment by major retailers, creating more concrete use cases and...

Critical RCE Flaw Discovered in Blockchain-Based EOS Smart Contract System

Security researchers have discovered a series of new vulnerabilities in EOS blockchain platform, one of which could allow remote hackers to take complete control over the node servers running the critical blockchain-based applications. EOS is an open source smart contract platform, known as...

Critical RCE Flaw Discovered in Blockchain-Based EOS Smart Contract System

Security researchers have discovered a series of new vulnerabilities in EOS blockchain platform, one of which could allow remote hackers to take complete control over the node servers running the critical blockchain-based applications. EOS is an open source smart contract platform, known as...