The Just In Time (JIT) Compiler service in Microsoft .NET Framework 1.0, 1.1, and 2.0 for Windows 2000, XP, Server 2003, and Vista allows user-assisted remote attackers to execute arbitrary code via unspecified vectors involving an "unchecked buffer," probably a buffer overflow, aka ".NET JIT Compiler Vulnerability".
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1873
https://exchange.xforce.ibmcloud.com/vulnerabilities/34639
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2007/ms07-040
http://www.vupen.com/english/advisories/2007/2482
http://www.us-cert.gov/cas/techalerts/TA07-191A.html
http://www.securitytracker.com/id?1018356
http://www.securityfocus.com/bid/24811
http://secunia.com/advisories/26003
http://archive.cert.uni-stuttgart.de/bugtraq/2007/07/msg00254.html