Microsoft warns of new IE bug; attacks under way
It's the second zero-day vulnerability in the last 60 days
Computerworld - Microsoft Corp. today warned of a critical vulnerability in Internet Explorer that is already being exploited by hackers; it was the company's second such admission in the past two months.
Internet Explorer 6 and its 2006 successor, IE7, contain a vulnerability that can be used by attackers to inject malicious code into a Windows PC. The oldest and newest of Microsoft's supported browsers, IE 5.01 and IE8, respectively, are not vulnerable to such attacks.
"At this time, we are aware of targeted attacks attempting to use this vulnerability," Microsoft acknowledged in an advisory posted simultaneously with two security updates that patched eight bugs in Windows and Office. Elsewhere, Microsoft said that the vulnerability had been publicly disclosed.
"It doesn't look like an exploit has been publicly posted," noted Andrew Storms, director of security operations at nCircle Network Security Inc., who added that Microsoft might have been made aware of the vulnerability either via a customer report or from one of the security companies that partner with it in the Microsoft Active Protections Program (MAPP). A report on the bug later today from the likes of Symantec or McAfee would indicate the latter, said Storms.
This is the second time in the last 60 days that Microsoft has admitted that hackers were exploiting an unpatched bug in IE. In mid-January, Microsoft said that a flaw in IE had been used to attack several companies' networks, including Google's and Adobe's. Microsoft patched that vulnerability, and seven others, later in the month when it issued an emergency update, often dubbed an "out-of-band" update.
As is its practice, Microsoft today did not spell out a timeline for patching the latest IE vulnerability, nor did it commit to an out-of-band fix.
Storms said it was too early to say whether Microsoft would rush a patch to users. "Generally, one of the indicators is if an exploit has gone public," he said, noting that as far as he knew, none had. "That often determines how quickly they'll patch. Of course, the way the Internet moves, [an exploit] could be posted in minutes, and then the story changes completely."
If Microsoft does not go out-of-band for this IE vulnerability, it might not issue a patch for it until May, Storms said, noting that the company will have to thoroughly test the repair job. April might be possible, he added, depending on how long Microsoft has known of the vulnerability and where it is in the fix cycle. "But then they wouldn't get a full QA cycle on the patch," he said.
Microsoft's next scheduled Patch Tuesday is April 13, five weeks from today.
Microsoft listed several recommended actions that users of IE6 and IE7 can take to defend themselves in lieu of a patch. They include modifying access to the "iepeers.dll," disabling scripting in the browsers and enabling DEP (data execution prevention).
Gregg Keizer covers Microsoft, security issues, Apple, Web browsers and general technology breaking news for Computerworld. Follow Gregg on Twitter at
@gkeizer or subscribe to Gregg's RSS feed
. His e-mail address is gkeizer@ix.netcom.com.
Security Alert
- Whoops! Microsoft leaks patch info four days early
- Researcher raps Apple for not blocking stolen SSL certificates
- Mac OS X can't properly revoke dodgy digital certificates
- Hackers may have stolen over 200 SSL certificates
- Apache patches Web server DoS vulnerability
- Google one of many victims in SSL certificate hack
- Hackers stole Google SSL certificate, Dutch firm admits
- Spike in mobile malware doubles Android users' chances of infection
- Microsoft patches critical Outlook drive-by bug
- 9 security suites: maximum protection, minimum fuss
Read more about Security in Computerworld's Security Topic Center.



- Excel 2010 Cheat Sheet
- Register for this Computerworld Insider Cheat Sheet and gain access to hundreds of premium content articles, guides, product reviews and more.
- Overcome Top 7 Admin Challenges of Active Directory
- As Active Directory's role in the enterprise has drastically increased, so has the need to secure the data. Gain insight on creating repeatable,...
- Insiders Can Ruin Your Company. Take Action.
- Did you know that 80 percent of threats to an organization come from the inside? The threat from insiders is often overlooked in...
- Top Solutions and Tools to Prevent Devastating Malware
- Custom malware frequently goes undetected. According to Forrester Research, the best way to reduce risk of breach is to deploy file integrity monitoring...
- X-Ray of the PCI Process-4 Proactive Steps
- This white paper from Forrester Research Inc., helps break PCI into understandable components. Security and risk professionals will gain knowledge and insight into...
- Identity Governance: The Business Imperatives
- This white paper describes the business challenges and opportunities that are driving interest in Identity Governance while discussing considerations your organization should make... All Security White Papers
- Live Webcast
Playing Defense: Staying on Top of Your Disaster Recovery Game - When it comes to disaster recovery, rapidly growing data volumes, distributed computing models, and new technologies all combine to present an ever-changing playing...
- Introduction to VMware vCenter Site Recovery Manager 5
- Traditional disaster recovery solutions are often too expensive, complex and unreliable to meet business requirements. As a result, IT departments are hesitant to...
- The Top Ten Secrets to Avoiding SAN Performance Problems
- Maintaining peak performance while simultaneously addressing the root cause of SAN errors is challenging. Learn the most common SAN problems and explore new...
- Deduplication Without Compromise
- Go inside Quantum's scalable, high-performance, multi-protocol new DXi deduplication appliances, designed to make backup much more effective. Discover how the new future-proof DXi6700...
- Director of Disk Products Discusses DXi6700
- Discover how the new DXi 6700 series of deduplication appliances provide investment protection and a future-proof feature set, all while delivering fast, scalable,...
- Playing Defense: Staying on Top of Your Disaster Recovery Game
- When it comes to disaster recovery, rapidly growing data volumes, distributed computing models, and new technologies all combine to present an ever-changing playing... All Security Webcasts
