Secunia Research: Easy Ringtone Maker NCTAudioFile2 ActiveX Control Buffer Overflow

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                     Secunia Research 24/01/2007

 - Easy Ringtone Maker 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 

Easy Ringtone Maker 2.0.5

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 

"Easy Ringtone Maker allows you to make custom REAL TONE ringtones
using any sounds or music. There are no subscription fees, no
commitments and no contracts! Create unique ringtones and set them to
be default ringers or to identify specific callers."

Product Links:
http://www.easyringtonemaker.com/home/

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4) Description of Vulnerability

Secunia Research has discovered a vulnerability in Easy Ringtone Maker,
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

Secunia offers vulnerability management solutions to corporate
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10) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2007-27/

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

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