CVE-2008-4800

Microsoft Debug Diagnostic Tool - Denial of Service via GetEntryPointForThread Method

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2008-4800. PoCs published by suN8Hclf.

AI-analyzed exploit summary This exploit triggers a NULL-pointer dereference in the DebugDiag ActiveX control by passing an invalid argument to the GetEntryPointForThread method, causing a denial-of-service condition in Internet Explorer.

Description

The DebugDiag ActiveX control in CrashHangExt.dll, possibly 1.0, in Microsoft Debug Diagnostic Tool allows remote attackers to cause a denial of service (NULL pointer dereference and Internet Explorer 6.0 crash) via a large negative integer argument to the GetEntryPointForThread method. NOTE: this issue might only be exploitable in limited environments or non-default browser settings.

Exploits (1)

exploitdb WORKING POC VERIFIED
by suN8Hclf · htmldoswindows
https://www.exploit-db.com/exploits/32550

This exploit triggers a NULL-pointer dereference in the DebugDiag ActiveX control by passing an invalid argument to the GetEntryPointForThread method, causing a denial-of-service condition in Internet Explorer.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Microsoft DebugDiag 1.0
No auth needed
Prerequisites: Victim must visit a malicious webpage using Internet Explorer with the vulnerable ActiveX control enabled
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Exploit vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/31996
Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq
http://www.securityfocus.com/archive/1/497943/100/0/threaded
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/46309
Third Party Advisory third-party-advisory x_refsource_sreason
http://securityreason.com/securityalert/4532

Scores

EPSS 0.2578
EPSS Percentile 97.7%

Details

CWE
CWE-399
Status published
Products (1)
microsoft/debug_diagnostic_tool
Published Oct 31, 2008
Tracked Since Feb 18, 2026