Feeds

Exploit Wednesday follows Patch Tuesday Word update

Action adds to malicious reaction

Reducing security risks from open source software

The trend for exploiting vulnerabilities around the same time as Microsoft's monthly Patch Tuesday update continues.

Hackers have crafted a new Word exploit based on a memory corruption vulnerability addressed by Microsoft on Tuesday. The flaw was already exploited prior to the release of the fix, according to Microsoft.

Until this week the critical flaw had only been exploited in targeted attacks, but it's now getting wider play.

Symantec reports that the vulnerability is now being exploited in more widespread attacks. Malformed Word documents doing the rounds contain shell code and three pieces of malware. The malware package is unusual in that it was created using the Word for Macintosh format instead of the standard Windows (OLE) format.

Despite the formating, the malicious Word documents are actually targeted at infecting Windows PCs, according to a preliminary analysis by Symantec.

Detection against the malware - dubbed the Mdropper-Z Trojan - has been added to Symantec's security software. It also detected the separate malware files contained in the payload of the maliciously-constructed word files as Trojan-Dropper, Backdoor-Trojan, and Hacktool-Rootkit.

The use of older file formats in the exploit could backfire on hackers. "The good news is that the default configuration in Microsoft Office 2007 and Office 2003, Service Pack 3 will not allow you to open some older Office file formats, including Office for Macintosh documents," Symantec notes. ®

Mobile application security vulnerability report

More from The Register

next story
LibreSSL RNG bug fix: What's all the forking fuss about, ask devs
Blow to bit-spitter 'tis but a flesh wound, claim team
Microsoft: You NEED bad passwords and should re-use them a lot
Dirty QWERTY a perfect P@ssword1 for garbage websites
Manic malware Mayhem spreads through Linux, FreeBSD web servers
And how Google could cripple infection rate in a second
NUDE SNAPS AGENCY: NSA bods love 'showing off your saucy selfies'
Swapping other people's sexts is a fringe benefit, says Snowden
Own a Cisco modem or wireless gateway? It might be owned by someone else, too
Remote code exec in HTTP server hands kit to bad guys
British data cops: We need greater powers and more money
You want data butt kicking, we need bigger boots - ICO
Crooks fling banking Trojan at Japanese smut site fans
Wait - they're doing online banking with an unpatched Windows PC?
NIST told to grow a pair and kick NSA to the curb
Lrn2crypto, oversight panel tells US govt's algorithm bods
prev story

Whitepapers

Top three mobile application threats
Prevent sensitive data leakage over insecure channels or stolen mobile devices.
The Essential Guide to IT Transformation
ServiceNow discusses three IT transformations that can help CIO's automate IT services to transform IT and the enterprise.
Mobile application security vulnerability report
The alarming realities regarding the sheer number of applications vulnerable to attack, and the most common and easily addressable vulnerability errors.
How modern custom applications can spur business growth
Learn how to create, deploy and manage custom applications without consuming or expanding the need for scarce, expensive IT resources.
Consolidation: the foundation for IT and business transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.