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full-disclosure-uk: [Full-disclosure] Secunia Research: BearShar

[Full-disclosure] Secunia Research: BearShare NCTAudioFile2 ActiveX Control Buffer Overflow

From: Secunia Research <remove-vuln_at_nospam>
Date: Thu May 10 2007 - 05:12:09 GMT
To: full-disclosure@lists.grok.org.uk


Secunia Research 09/05/2007 - BearShare 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

BearShare 6.0.2.26789

NOTE: Other versions may also be affected.



2) Severity

Rating: Highly critical
Impact: System compromise
Where: Remote



3) Vendor's Description of Software

"Share, Discover and Download music and videos."

Product Link:
http://www.bearshare.com/



4) Description of Vulnerability

Secunia Research has discovered a vulnerability in BearShare, 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.



5) Solution

Set the kill-bit for the affected ActiveX control.



6) Time Table

30/04/2007 - Vendor notified.
09/05/2007 - Public disclosure.



7) Credits

Discovered by Carsten Eiram, Secunia Research.



8) References

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



9) About Secunia

Secunia offers vulnerability management solutions to corporate customers with verified and reliable vulnerability intelligence relevant to their specific system configuration:

http://corporate.secunia.com/

Secunia also provides a publicly accessible and comprehensive advisory database as a service to the security community and private individuals, who are interested in or concerned about IT-security.

http://secunia.com/

Secunia believes that it is important to support the community and to do active vulnerability research in order to aid improving the security and reliability of software in general:

http://corporate.secunia.com/secunia_research/33/

Secunia regularly hires new skilled team members. Check the URL below to see currently vacant positions:

http://secunia.com/secunia_vacancies/

Secunia offers a FREE mailing list called Secunia Security Advisories:

http://secunia.com/secunia_security_advisories/


  1. Verification

Please verify this advisory by visiting the Secunia website: http://secunia.com/secunia_research/2007-50/

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




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