Two vulnerabilities have been reported in Microsoft Windows, which can be exploited by malicious, local users to gain escalated privileges.
1) An error in the "RtlQueryRegistryValues()" function can be exploited to cause a buffer overflow when e.g. called by the "GreEnableEUDC()" function in win32k.sys to copy a specially crafted "SystemDefaultEUDCFont" registry value.
2) A type conversion error in the kernel's support for Trace Events may result in an insufficiently sized buffer being allocated for userspace data, which can be exploited to cause a buffer overflow.
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Subject: Microsoft Windows Kernel Two Privilege Escalation Vulnerabilities
RE: Microsoft Windows win32k.sys Driver "GreEnableEUDC()" Vulnerability
1st Dec, 2010 11:58
Score: 0 Posts: 1 User Since: 1st Dec 2010 System Score: N/A Location: NL Last edited on 1st Dec, 2010 11:58
- Create a subkey "EUDC" directly under "HKEY_CURRENT_USER"
- Open the advanced permissions dialog for the "EUDC" key
- Add the group "Everyone" and deny this group the following permissions:
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