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Date: Thu, 10 May 2007 07:12:09 +0200 From: Secunia Research <remove-vuln@...unia.com> To: full-disclosure@...ts.grok.org.uk Subject: Secunia Research: BearShare NCTAudioFile2 ActiveX Control Buffer Overflow ====================================================================== Secunia Research 09/05/2007 - BearShare NCTAudioFile2 ActiveX Control Buffer Overflow - ====================================================================== 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 ====================================================================== 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/ ====================================================================== 10) 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/ ====================================================================== _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
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