Microsoft Windows Embedded OpenType Font Engine Multiple Vulnerabilities ( 15 July 2009 )

1. Embedded OpenType Font Heap Overflow Vulnerability

A remote code execution vulnerability exists in the way that Microsoft Windows Embedded OpenType (EOT) font technology parses data records in specially crafted embedded fonts. If a user is logged on with administrative user rights, an attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.

2. Embedded OpenType Font Integer Overflow Vulnerability

A remote code execution vulnerability exists in the way that Microsoft Windows Embedded OpenType (EOT) font technology parses name tables in specially crafted embedded fonts. If a user is logged on with administrative user rights, an attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.