CVE-2009-3676
The SMB client in the kernel in Microsoft Windows Server 2008 R2 and Windows 7 allows remote SMB servers and man-in-the-middle attackers to cause a denial of service (infinite loop and system hang) via a (1) SMBv1 or (2) SMBv2 response packet that contains (a) an incorrect length value in a NetBIOS header or (b) an additional length field at the end of this response packet, aka "SMB Client Incomplete Response Vulnerability."
Key facts
- CVSS score
- 7.1 (v2.0)
- Severity
- HIGH
- CVSS vector
AV:N/AC:M/Au:N/C:N/I:N/A:C- Weakness (CWE)
- CWE-399
- EPSS score
- 34.6% (98th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2009-3651)
- Published
- November 13, 2009
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2009-3651 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- microsoft / windows 7
- microsoft / windows server 2008
Certified products that may be affected
7 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.
- Windows 7 BitLocker™ Drive Encryption - Microsoft Corporation - FIPS 140 1332 - historical
- Microsoft Windows 7 Kernel Mode Cryptographic Primitives Library (cng.sys) - Microsoft Corporation - FIPS 140 1328 - historical
- Microsoft Windows Vista Kernel Mode Security Support Provider Interface (ksecdd.sys) - Microsoft Corporation - FIPS 140 1000 - historical
- Microsoft Windows Vista Cryptographic Primitives Library (bcrypt.dll) - Microsoft Corporation - FIPS 140 1001 - historical
- Microsoft Windows XP Kernel Mode Cryptographic Module (FIPS.SYS) - Microsoft Corporation - FIPS 140 997 - historical
See all 7 in the Security Certifications Explorer.
References
- http://blogs.technet.com/msrc/archive/2009/11/13/microsoft-security-advisory-977544-released.aspx
- http://g-laurent.blogspot.com/2009/11/windows-7-server-2008r2-remote-kernel.html(Exploit)
- http://news.cnet.com/8301-27080_3-10395891-245.html
- http://praetorianprefect.com/archives/2009/11/how-to-crash-windows-7-and-server-2008/(Exploit)
- http://seclists.org/fulldisclosure/2009/Nov/134(Exploit)
- http://secunia.com/advisories/37347(Vendor Advisory)
- http://secunia.com/blog/66/(Vendor Advisory)
- http://www.microsoft.com/technet/security/advisory/977544.mspx(Patch, Vendor Advisory)
- http://www.securitytracker.com/id?1023179
- http://www.us-cert.gov/cas/techalerts/TA10-103A.html(US Government Resource)
- http://www.vupen.com/english/advisories/2009/3216(Vendor Advisory)
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-020
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7186
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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