Symantec Reports New Zero-Day Word Bug - InformationWeek
IoT
IoT
Software // Enterprise Applications
News
1/26/2007
12:17 PM
50%
50%

Symantec Reports New Zero-Day Word Bug

The bug, which affects Word 2000, lets hackers execute their own code with the same privileges as the user.

Attackers are using a critical, unpatched vulnerability in Microsoft Word -- the fourth known unfixed flaw in the popular word processor -- to hijack computers, Symantec warned Friday.

The bug, which affects Word 2000, lets hackers execute their own code with the same privileges as the user. In most cases, Windows users run in administrator mode, which allows full access to the PC and its files. If a user opens a malformed Word file, which would typically be delivered as a file attachment to a spoofed e-mail, the Mdropper.m Trojan creates a backdoor that allows later remote access by the attacker.

Danish vulnerability tracker Secunia rated the new vulnerability as "Extremely critical," the highest warning in its 1 through 5 scale.

Although only Word 2000 can lead to a complete compromise of the PC, Word 2002 and Word 2003 users attacked by the exploit will find that all the computer's processor cycles are consumed by the malware, effectively creating a denial-of-service attack. Rebooting the computer is the only way to regain control of the machine.

The new flaw is different from three other unpatched Word bugs that appeared in December 2006. Microsoft has let the vulnerabilities slide in the last two monthly security updates.

Symantec recommended that users not open Word attachments "unless they are expected and come from a known and trusted source."

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
How Enterprises Are Attacking the IT Security Enterprise
How Enterprises Are Attacking the IT Security Enterprise
To learn more about what organizations are doing to tackle attacks and threats we surveyed a group of 300 IT and infosec professionals to find out what their biggest IT security challenges are and what they're doing to defend against today's threats. Download the report to see what they're saying.
Register for InformationWeek Newsletters
White Papers
Current Issue
2017 State of the Cloud Report
As the use of public cloud becomes a given, IT leaders must navigate the transition and advocate for management tools or architectures that allow them to realize the benefits they seek. Download this report to explore the issues and how to best leverage the cloud moving forward.
Video
Slideshows
Twitter Feed
InformationWeek Radio
Archived InformationWeek Radio
Join us for a roundup of the top stories on InformationWeek.com for the week of November 6, 2016. We'll be talking with the InformationWeek.com editors and correspondents who brought you the top stories of the week to get the "story behind the story."
Sponsored Live Streaming Video
Everything You've Been Told About Mobility Is Wrong
Attend this video symposium with Sean Wisdom, Global Director of Mobility Solutions, and learn about how you can harness powerful new products to mobilize your business potential.
Flash Poll