Home/CVE/Buffer overflow in the HTML Help ActiveX Control (hhctrl.ocx) in Microsoft Windows 98, 98 Second Edition, Millennium Edi
CVE

CVE-2002-0693

Buffer overflow in the HTML Help ActiveX Control (hhctrl.ocx) in Microsoft Windows 98, 98 Second Edition, Millennium Edi

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.

HIGH · CVSS 7.5 EPSS 0.61298
Act now
  • EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
  • EPSS percentile: top 2% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules1 YARA rules0
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Affected Products & Versions

7
microsoft windows 2000all versions
microsoft windows 2000 terminal servicesall versions
microsoft windows 98all versions
microsoft windows 98seall versions
microsoft windows meall versions
microsoft windows ntall versions
microsoft windows xpall versions
⚠

Public Exploits & PoCs

1
remoteMicrosoft Windows XP/2000/NT 4.0 - Help Facility ActiveX Control Buffer Overflowverified
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Detection Rules (IDS/IPS)

1
snort-communityOS-WINDOWS Microsoft Windows HTML Help hhctrl.ocx clsid access attemptattempted-user
Open rulesets (ET Open, Snort Community, abuse.ch) link to source. Commercial rulesets are reference-only.
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumWow6432Node Windows NT CurrentVersion Autorun Keys Modification
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Scoring & Timeline

7.5
HIGH · CVSS v2 (legacy) · cve@mitre.org
View on NVD
This CVE predates CVSS v3; the legacy v2 score is shown so triage still has a severity to work with.
v2 Vector
AV:N/AC:L/Au:N/C:P/I:P/A:P
Published to NVD10 Oct 2002 · 04:00 AM
🔗

References & Sources

7
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://marc.info/?l=bugtraq&m=103365849505409&w=2
http://marc.info/?l=bugtraq&m=103419115517344&w=2
http://marc.info/?l=bugtraq&m=103435279404182&w=2
http://www.iss.net/security_center/static/10253.phpVendor Advisory
http://www.securityfocus.com/bid/5874
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2002/ms02-055
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