Withdrawal vulnerabilities allowed bitcoin thieves to hit Flexcoin and Poloniex

Hackers found security weaknesses that allowed them to overdraw accounts with Flexcoin and Poloniex, two websites that facilitate bitcoin transactions, and exploited them to steal bitcoins from the two services. The attacks put Flexcoin out of business and cost Poloniex's users 12.3 percent of their bitcoins. Computerworld Malware and Vulnerabilities‚Ķ read more →