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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

JPGDownloader

Threat LevelModerate threatDamageHighDistributionNot widespread
Common name:JPGDownloader
Technical name:Constructor/JPGDownloader
Threat level:Low
Type:Security Risk
Subtype: Virus Constructor
Effects:  

It allows to create JPG images that exploit the Buffer Overrun in JPEG processing vulnerability.

Affected platforms:

Windows 2003/XP/2000/NT/ME/98/95

First detected on:Sept. 24, 2004
Detection updated on:Sept. 24, 2004
StatisticsNo
Proactive protection:
Yes, using TruPrevent Technologies

Brief Description 

    

JPGDownloader is a program that allows to create images in JPG format that exploit the vulnerability described in the Microsoft bulletin MS04-028, Buffer Overrun in JPEG processing.

If this specially crafted JPG image is opened using a vulnerable application, the vulnerability allows to download a file from the Internet and run it on the affected computer. The downloaded file will usually have a malicious nature: viruses, worms, Trojans, spyware, adware, etc.

 

It is very recommendable to visit Microsoft's official website and check whether any application vulnerable to Buffer Overrun in JPEG processing is installed on your computer, and if so, apply the corresponding security patch.

Visible Symptoms 

    

JPGDownloader is difficult to recognize, as it does not display any messages or warnings that indicate it has reached the computer.