Microsoft Windows Vista Gold, SP1, and SP2 and Server 2008 Gold and SP2 do not properly validate fields in SMBv2 packets, which allows remote attackers to cause a denial of service (infinite loop and system hang) via a crafted packet to the Server service, aka "SMBv2 Infinite Loop Vulnerability."

References

• https://nvd.nist.gov/vuln/detail/CVE-2009-2526
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-050
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5595
• http://www.us-cert.gov/cas/techalerts/TA09-286A.html