Yahoo Japan breach exposes user information

May 27, 2013

Up to 22 million user login names may have been exposed during a breach at Yahoo Japan, in news that highlights the importance of having an up to date vulnerability management plan.

In a statement released last week, the company said that unauthorised access to its ID servers had been discovered, as well as a file that hosted login names for users.

There may have been a possibility that this file was transferred, potentially jeopardising the information of millions of Yahoo users, ten per cent of the company's user base.

"We don't know if the file was leaked or not, but we can't deny the possibility, given the volume of traffic between our server and external terminals," the statement issued May 24 reads.

Yahoo Japan has now recommended that its users change their passwords as a precautionary measure, and a new tool has been added onto the company's homepage which allows users to check if their ID is affected by the breach.

The news serves as a timely reminder to all businesses about the importance of a robust security policy. Cybercriminals can strike at any time, which is why regular penetration testing is essential to maintain privacy standards.

A trusted security provider can undertake a thorough security audit of your company to assess whether your security policy has any flaws or gaps which could be exploited.

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