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First sites admit data loss through Heartbleed attacks

First sites admit data loss through Heartbleed attacks

Canada's tax authority and a popular British parenting site are the first to admit data loss

Canada's tax authority and a popular British parenting website both lost user data after attackers exploited the Heartbleed SSL vulnerability, they said Monday.

The admissions are thought to be the first from websites that confirm data loss as a result of Heartbleed, which was first publicized last Monday. The flaw existed in Open SSL, a cryptographic library used by thousands of websites to enable encryption, and was quickly labeled one of the most serious security vulnerabilities in years.

The Canada Revenue Agency (CRA) blocked public access to its online services last Tuesday in reaction to the announcement, but that wasn't fast enough to stop attackers from stealing information, it said on its website.

"Regrettably, the CRA has been notified by the Government of Canada's lead security agencies of a malicious breach of taxpayer data that occurred over a six-hour period. Based on our analysis to date, Social Insurance Numbers of approximately 900 taxpayers were removed from CRA systems by someone exploiting the Heartbleed vulnerability."

The CRA said its analysis of the attack is not yet complete and it is continuing to analyze "other fragments of data, some that may relate to businesses" that was also apparently removed.

Mumsnet, a British parenting website with more than a million registered users, said over the weekend that it was forcing all users to change their passwords as a result of a Heartbleed attack.

"We are very sorry for all the fuss," the site said. "We want to assure you that we followed all the published steps to protect members' security as soon as we became aware of the Heartbleed security risk, but it seems that the breach occurred prior to that risk becoming known."

The site first became aware of the problem after founder Justine Roberts found messages posted to the site from her own account, she told BBC News.

Martyn Williams covers mobile telecoms, Silicon Valley and general technology breaking news for The IDG News Service. Follow Martyn on Twitter at @martyn_williams. Martyn's e-mail address is martyn_williams@idg.com


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Tags Exploits / vulnerabilitiesCanada Revenue AuthorityMumsnet

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