Bill GatesAP/Press Association Images

A weakness has been revealed in Microsoft Internet Explorer software, and there are warnings that criminals are already using it to target users with malicious attacks of software known as Poison Ivy.

So what can you do to protect yourself?


Weakness

The weakness is what is known as a 'zero day' failure in the software - which means it's a weakness that was discovered before there was any time to produce a patch to fix it.

It was identified by a Luxembourg-based IT security adviser at ZATAZ.com who was analysing the servers that had been used by a hacking gang. After uploading a sample file to a computer with a fully up-to-date Windows XP operating system along with an up-to-date version of Adobe Flash, he discovered that the malicious software had been uploaded - and that a weakness in Internet Explorer had allowed the virus in.


This is alarming on two fronts - first that there is a weakness, and second that criminal gangs are already exploiting it. Graham Cluley, a technology consultant at Sophos, says it's the latter fact that "is a worry'.

Patch

Microsoft has issued an initial 'workaround' to keep out attacks. However, Cluley warns that this isn't a "proper patch", and that users of Internet Explorer 6, 7,8 or 9 will have to wait for an update to restore fully-functional security. These are issued every month, although he says there have been times when Microsoft has brought forward a release in order to respond to a threat.

He says: "Users will have to decide whether to install the workaround Microsoft has issued, or switch to another browser. There probably isn't much harm in trying another browser such as Firefox or Google Chrome for a while."


Not inferior

However, he adds that this current security weakness does not make Explorer an inferior browser. He points out that: "All browsers have faced security holes at some point."

Whether you switch or patch, therefore, it is worth making sure that you are signed up for automatic security updates on your computer. This, he says: "will ensure that everything from the operating system to the browser receive updates as soon as possible if a security weakness is detected. It is also worth ensuring that you have up-to-date virus software."



More stories