Microsoft Internet Explorer 9 does not properly handle the creation and initialization of string objects, which allows remote attackers to read data from arbitrary process-memory locations via a crafted web site, aka "Null Byte Information Disclosure Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14870
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-010