We use cookies to provide you with a better experience. If you continue to use this site, we'll assume you're happy with this. Alternatively, click here to find out how to manage these cookies

hide cookie message
80,259 News Articles

PowerPoint flaw 'old news'

Microsoft says it was fixed last month

An unpatched security flaw in PowerPoint is not so new after all, according to Microsoft, which claims it fixed the problem earlier this month.

On Saturday, Trend Micro published a description of a Trojan called Troj_mdropper.bh which, it claimed, exploited an undocumented bug in PowerPoint. The description was based on code samples retrieved on 17 August, according to Trend Micro.

The initial report was published without consulting Microsoft, and initially Trend Micro said the flaws exploited were different from the PowerPoint bugs patched in advisory MS06-048 on 8 August. The flaw was widely reported, including on the US government's National Vulnerabilities Database.

Once Microsoft received samples of the code, it tested them and found that, in fact, MS06-048 did fix the problem, the company said late on Monday. Trend Micro has been forced to amend its initial report, which now states that "This malware exploits a known vulnerability in Windows," and recommends downloading the patch.

The Trojan does, however, still affect unpatched systems.

Once Troj_mdropper.bh arrives on a system, either downloaded from the internet or dropped off by other malware, it exploits the known PowerPoint bug, allowing it to execute arbitrary code on Windows, according to Trend Micro. It attempts to drop the Small-CMZ Trojan into the temporary folder of the machine, and Small-CMZ, in turn, attempts to download various other malware from the internet.


IDG UK Sites

LG G4 Note UK release date and specification rumours: Samsung Galaxy Note 5 killer could be the LG 3......

IDG UK Sites

In defence of BlackBerrys

IDG UK Sites

Why we should reserve judgement on Apple ditching Helvetica in OS X/iOS for the Apple Watch's San...

IDG UK Sites

Retina 3.3GHz iMac 27in preview: Apple cuts £400 of price of Retina iMac with new model