Microsoft Windows - 'LoadUvsTable()' Heap Buffer Overflow

ID EDB-ID:41615
Type exploitdb
Reporter Exploit-DB
Modified 2017-03-15T00:00:00


                                            # Date: 15-03-2017
# Author: Hossein Lotfi (
# CVE: CVE-2016-7274

1. Description

An integer overflow error within the "LoadUvsTable()" function of usp10.dll
can be exploited to cause a heap-based buffer overflow. Full analysis is
available at:

2. Proof of Concept

open “C:\Windows\Fonts\phagspa.ttf” in a hex editor and change the value at
offset 0x2051 from 0x00000006 to 0x33333334.

3. Solution:

Microsoft initially tried to fixed the issue in MS16-147, but the fix was
incomplete and the issue remained unpatched til Microsoft March 2017 patch

It appears MS17-013 finally fixed the vulnerability properly: