TSC2 Help Desk CTab ActiveX Control Buffer Overflow

2009.01.08
Risk: High
Local: No
Remote: Yes
CWE: CWE-119


CVSS Base Score: 9.3/10
Impact Subscore: 10/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: Complete
Integrity impact: Complete
Availability impact: Complete

====================================================================== Secunia Research 07/01/2009 - TSC2 Help Desk CTab 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 * TSC2 Help Desk 4.1.8 NOTE: Other versions may also be affected. ====================================================================== 2) Severity Rating: Highly critical Impact: System compromise Where: Remote ====================================================================== 3) Vendor's Description of Software "TSC2 Help Desk from is full-featured, easy to use help desk software that will help you manage your support issues and assets.". Product Link: http://www.tsc2-helpdesk.com/ ====================================================================== 4) Description of Vulnerability Secunia Research has discovered a vulnerability in TSC2 Help Desk, which can be exploited by malicious people to potentially compromise a user's system. The vulnerability is caused due to a boundary error in the included CTab ActiveX control (c1sizer.ocx) when copying tab captions. This can be exploited to cause a heap-based buffer overflow by e.g. adding multiple tabs via the "AddTab()" method. Successful exploitation may allow execution of arbitrary code. ====================================================================== 5) Solution Set the kill-bit for the affected ActiveX control. ====================================================================== 6) Time Table 13/11/2008 - Vendor notified. 07/01/2009 - Public disclosure. ====================================================================== 7) Credits Discovered by Carsten Eiram, Secunia Research. ====================================================================== 8) References The Common Vulnerabilities and Exposures (CVE) project has assigned CVE-2008-4827 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://secunia.com/advisories/business_solutions/ 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/advisories/ 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://secunia.com/secunia_research/ Secunia regularly hires new skilled team members. Check the URL below to see currently vacant positions: http://secunia.com/corporate/jobs/ Secunia offers a FREE mailing list called Secunia Security Advisories: http://secunia.com/advisories/mailing_lists/ ====================================================================== 10) Verification Please verify this advisory by visiting the Secunia website: http://secunia.com/secunia_research/2008-54/ Complete list of vulnerability reports published by Secunia Research: http://secunia.com/secunia_research/ ======================================================================

References:

http://xforce.iss.net/xforce/xfdb/47771
http://xforce.iss.net/xforce/xfdb/47770
http://xforce.iss.net/xforce/xfdb/47769
http://www.securityfocus.com/bid/33148
http://www.securityfocus.com/archive/1/archive/1/499830/100/0/threaded
http://securitytracker.com/id?1021529
http://secunia.com/secunia_research/2008-54/
http://secunia.com/secunia_research/2008-53/
http://secunia.com/secunia_research/2008-52/
http://secunia.com/advisories/32672
http://secunia.com/advisories/32648
http://secunia.com/advisories/32609


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