Secunia Research: Joshua Software Products NCTAudioFile2 ActiveX Control Buffer Overflow

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                     Secunia Research 24/01/2007

		    - Joshua Software Products -
	 - NCTAudioFile2 ActiveX Control Buffer Overflow -

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Table of Contents

Affected Software....................................................1
Severity.............................................................2
Vendor's Description of Software.....................................3
Description of Vulnerability.........................................4
Solution.............................................................5
Time Table...........................................................6
Credits..............................................................7
References...........................................................8
About Secunia........................................................9
Verification........................................................10

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1) Affected Software 

Video Converter Plus 3.01
Audio Convertor Plus 2.2

NOTE: Other versions may also be affected.

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2) Severity 

Rating: Highly critical
Impact: System compromise
Where:  Remote

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3) Vendor's Description of Software 

"Video Converter Plus is a small and effective solution for video file
conversion. With a very easy to use interface you can convert video
formats, extract audio from video files and extract images from video
files."

Product Link:
http://www.awlmedia.com/vcmain.htm

"Audio Convertor Plus is a powerful audio conversion tool. It can batch
convert audio files from one format to another.It supports most of the
popular audio formats like Wav (Standard PCM, Compressed WAV), MPEG
(MP3, MP2, MP1), Ogg Vorbis, WMA, AVI, VOX, RAW, G72x (G7.21, G7.23,
G7.26), DSP, MPPlus (MPC, MP+), Apple Audio (AIF, AIFF, AIFC) and Unix
Audio (AU, SUD). It Supported conversions include MP3 to WAV, WAV to
MP3, OGG to WAV, WAV to OGG, MP3 to OGG, OGG to MP3, MP3 to WMA, WMA to
MP3 and more."

Product Link:
http://www.awlmedia.com/acmain.htm

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4) Description of Vulnerability

Secunia Research has discovered a vulnerability in two Joshua
Software products, which can be exploited by malicious people to
compromise a user's system.

The vulnerability is caused due to a boundary error in the
NCTAudioFile2.AudioFile ActiveX control when handling the
"SetFormatLikeSample()" method. This can be exploited to cause a 
stack-based buffer overflow by passing an overly long string (about 
4124 bytes) as argument to the affected method.

Successful exploitation allows execution of arbitrary code when a user
e.g. visits a malicious website.

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5) Solution 

Set the kill-bit for the affected ActiveX control.

Use another product.

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6) Time Table 

17/01/2007 - Vendor notified.
24/01/2007 - Public disclosure.

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7) Credits 

Discovered by Carsten Eiram, Secunia Research.

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8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned 
CVE-2007-0018 for the vulnerability.

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9) About Secunia

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10) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2007-19/

Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/

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