Hackers are taking advantage of a newly discovered vulnerability in Internet Explorer to install spyware on PCs that visit any of a number of Russian porn sites.
The malware, first reported yesterday by researchers at Sunbelt Software, takes advantage of an unpatched flaw in the way IE processes Vector Markup Language (VML) code. VML is a language used to display graphic information on the Web. The attack appears to work on all versions of Windows running the IE 6 browser, said Eric Sites, Sunbelt's vice president of research and development. "It's not an operating system-dependent issue," he said.
Sunbelt first discovered the malware on a Russian porn site late Friday. "This site and a couple of others use an exploit kit called Web Attacker, and it looks like the Web Attacker kit has been upgraded to include this new exploit," Sites said.
Since late last week Sunbelt noticed that the attack code has popped up on about a half-dozen Russian porn sites. In addition, since security researchers estimate that Web Attacker is used by nearly 1,000 Web sites, this latest exploit should soon become more widespread.
Web Attacker is a software development kit sold for as little as $20 to criminals looking for an easy way to develop malware. Websense posted an informational alert for Web Attacker last April.
"Since it's being built into the next version of the Web Attacker kit, we expect that this thing will be everywhere in a few days," said Sites.
Microsoft Patch Planned
Whether the attacks will be widespread enough for Microsoft to rush to patch the flaw remains to be seen.
Microsoft today confirmed the Sunbelt team's findings, and said it planned to fix the VML bug in its next set of security patches, scheduled to be released on Oct. 10, "or sooner as warranted," according to a statement from the company's public relations agency.
This is the second unpatched flaw found in IE over the past week. On Sept. 14, researchers posted code that could be used to exploit a different vulnerability in a multimedia component of Internet Explorer. Microsoft is still investigating that flaw and is not saying whether it too will be patched next month.