Object Linking and Embedding (OLE) Automation in Microsoft Windows XP SP3 does not properly allocate memory, which allows remote attackers to execute arbitrary code via a crafted RTF document, aka "OLE Automation Remote Code Execution Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16385
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-037
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-020