Microsoft Internet Explorer 7 through 9 does not properly create and initialize string data, which allows remote attackers to obtain sensitive information from process memory via a crafted HTML document, aka "Null Byte Information Disclosure Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15026
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-037