Description
Buffer overflow in the HTML Help ActiveX Control (hhctrl.ocx) in Microsoft Windows 98, 98 Second Edition, Millennium Edition, NT 4.0, NT 4.0 Terminal Server Edition, Windows 2000, and Windows XP allows remote attackers to execute code via (1) a long parameter to the Alink function, or (2) script containing a long argument to the showHelp function.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Microsoft Windows XP/2000/NT 4.0 - Help Facility ActiveX Control Buffer Overflow EDB-21902 · remote · Oct 7, 2002 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- oval:org.mitre.oval:def:374 vdb-entry signature
- 5874 vdb-entry
- MS02-055 vendor-advisory
- 20021003 Buffer Overflow in IE/Outlook HTML Help mailing-list
- 20021010 prover of concept code of windows help overflow mailing-list
- win-html-help-bo(10253) vdb-entry
- 20021009 Thor Larholm security advisory TL#004 mailing-list