Technical intelligence and weaponization dossier for CVE-2006-3439. Documented exploitation across 2 active malware families totaling 359 analyzed telemetry samples.
| Vulnerability ID | CVE-2006-3439 |
|---|---|
| Common Name / Bulletin | Microsoft Windows Server Service NetprPathCanonicalize Buffer Overflow (MS06-040) |
| CWE Classification | CWE-119: Stack Overflow in CANONICALIZE.C |
| Affected Software & Versions | Microsoft Windows 2000, XP, Server 2003 |
| Technical Root Cause | Stack overflow in the Server Service (srvsvc.dll) when canonicalizing network paths passed to NetprPathCanonicalize via RPC over SMB port 445, heavily weaponized by polymorphic worms like Allaple. |
| Associated ATT&CK Techniques |
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Empirical catalog telemetry verifies that the following 2 malware families weaponize this vulnerability for initial access, privilege escalation, or lateral movement:
| Malware Family | Category | Catalog Samples | Operational Profile |
|---|---|---|---|
| kolab | Worm | 219 | Kolab (cataloged across security vendors as Worm:Win32/Kolab, Net-Worm.Win32.Kolab, WORM_KOLABC, and W32/Kolab) is a prolific Windows network worm and backdoor ... |
| allaple | Worm | 140 | Allaple (also cataloged in threat research as Rahack, Net-Worm.Win32.Allaple, and W32/Allaple) is an infamous, self-propagating polymorphic computer worm first ... |
Threat hunting leads and behavioral telemetry patterns to identify weaponized exploitation of CVE-2006-3439 in enterprise networks:
Anomalous RPC traffic over SMB named pipe \PIPE\srvsvc with malformed path strings containing repeating directory traversal delimiters.SOC containment checklist and attack surface reduction measures to neutralize exploitation:
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