CVE-2006-0021

Windows XP SP1-SP2 and Server 2003 up to SP1 - Denial of Service via Invalid IGMP Packet

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2006-0021. PoCs published by Firestorm, Alexey Sintsov.

AI-analyzed exploit summary This exploit sends a malformed IGMPv3 query packet to trigger a denial-of-service condition in vulnerable Windows systems. It constructs a raw IP packet with IGMP payload and sends it to the target.

Description

Microsoft Windows XP SP1 and SP2, and Server 2003 up to SP1, allows remote attackers to cause a denial of service (hang) via an IGMP packet with an invalid IP option, aka the "IGMP v3 DoS Vulnerability."

Exploits (2)

exploitdb WORKING POC VERIFIED
by Firestorm · cdoswindows
https://www.exploit-db.com/exploits/1603

This exploit sends a malformed IGMPv3 query packet to trigger a denial-of-service condition in vulnerable Windows systems. It constructs a raw IP packet with IGMP payload and sends it to the target.

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Windows (e.g., Windows XP SP2)
No auth needed
Prerequisites: Raw socket permissions · Target IP address
devstral-2 · analyzed Feb 16, 2026 Full analysis →
exploitdb WORKING POC VERIFIED
by Alexey Sintsov · c++doswindows
https://www.exploit-db.com/exploits/1599

This exploit targets CVE-2006-0021, a DoS vulnerability in Microsoft Windows XP and Server 2003 due to improper handling of IGMPv3 packets. It crafts a malformed IGMP packet with specific IP options to trigger a denial-of-service condition.

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Windows XP, Microsoft Windows Server 2003
No auth needed
Prerequisites: Administrator rights on the system · Windows Firewall disabled for RAW packet sending
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (16)

Core 16
Core References
Third Party Advisory, VDB Entry vdb-entry signature x_refsource_oval
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1310
Vendor Advisory vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2006/0576
Third Party Advisory, VDB Entry vdb-entry signature x_refsource_oval
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1425
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/24489
Patch vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/16645
Third Party Advisory, VDB Entry vdb-entry signature x_refsource_oval
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1662
Third Party Advisory, US Government Resource third-party-advisory x_refsource_cert-vn
http://www.kb.cert.org/vuls/id/839284
Third Party Advisory, US Government Resource third-party-advisory x_refsource_cert
http://www.us-cert.gov/cas/techalerts/TA06-045A.html
Third Party Advisory, VDB Entry vdb-entry signature x_refsource_oval
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A678
Third Party Advisory, VDB Entry vdb-entry signature x_refsource_oval
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1647
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://securitytracker.com/id?1015629
Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq
http://www.securityfocus.com/archive/1/482658/30/4350/threaded
Exploit, Third Party Advisory exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/1599
Various Sources x_refsource_misc
http://www.securiteam.com/exploits/5PP0T0KI0O.html
Patch, Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/18853

Scores

EPSS 0.6966
EPSS Percentile 98.7%

Details

CWE
CWE-119
Status published
Products (8)
microsoft/windows_2003_server datacenter_64-bit sp1
microsoft/windows_2003_server enterprise (2 CPE variants)
microsoft/windows_2003_server enterprise_64-bit
microsoft/windows_2003_server r2 (3 CPE variants)
microsoft/windows_2003_server standard (2 CPE variants)
microsoft/windows_2003_server standard_64-bit
microsoft/windows_2003_server web (2 CPE variants)
microsoft/windows_xp (12 CPE variants)
Published Feb 14, 2006
Tracked Since Feb 18, 2026