CVE-2019-19308

In texttoglyphs in sushi-font-widget.c in gnome-font-viewer 3.34.0, there is a NULL pointer dereference while parsing a TTF font file that lacks a name section due to a gstrconcat call that returns NULL...

CVE-2019-19308

In texttoglyphs in sushi-font-widget.c in gnome-font-viewer 3.34.0, there is a NULL pointer dereference while parsing a TTF font file that lacks a name section due to a gstrconcat call that returns NULL...

Windows Kernel - win32k.sys TTF Font Processing Pool Corruption in win32k!ulClearTypeFilter

Windows Kernel - win32k.sys TTF Font Processing Pool Corruption in win32k!ulClearTypeFilter We have encountered a Windows kernel crash in the win32k.sys driver while processing a corrupted TTF font file. An example crash log excerpt generated after triggering the bug is shown below: --- cut ---...

Windows Kernel - win32k.sys TTF Font Processing Pool Corruption in win32k!ulClearTypeFilter Exploit

We have encountered a Windows kernel crash in the win32k.sys driver while processing a corrupted TTF font file. An example crash log excerpt generated after triggering the bug is shown below: --- cut --- Fatal System Error: 0x00000050...

Microsoft Windows Kernel - win32k.sys TTF Font Processing Pool Corruption in win32k!ulClearTypeFilter

We have encountered a Windows kernel crash in the win32k.sys driver while processing a corrupted TTF font file. An example crash log excerpt generated after triggering the bug is shown below: --- cut --- Fatal System Error: 0x00000050...

Microsoft DirectWrite - Out-of-Bounds Read in sfac_GetSbitBitmap While Processing TTF Fonts

Microsoft DirectWrite is a modern Windows API for high-quality text rendering. A majority of its code resides in the DWrite.dll user-mode library. It is used by a variety of widely used desktop programs such as web browsers and constitutes an attack surface for memory corruption bugs, as it...

Microsoft Font Subsetting - DLL Heap-Based Out-of-Bounds read in FixSbitSubTableFormat1

Microsoft Font Subsetting - DLL Heap-Based Out-of-Bounds read in FixSbitSubTableFormat1 -----===== Background =====----- The Microsoft Font Subsetting DLL fontsub.dll is a default Windows helper library for subsetting TTF fonts; i.e. converting fonts to their more compact versions based on the...

Microsoft Font Subsetting - DLL Heap Corruption in ReadAllocFormat12CharGlyphMapList

Microsoft Font Subsetting - DLL Heap Corruption in ReadAllocFormat12CharGlyphMapList -----===== Background =====----- The Microsoft Font Subsetting DLL fontsub.dll is a default Windows helper library for subsetting TTF fonts; i.e. converting fonts to their more compact versions based on the...

Adobe Acrobat Reader DC for Windows - Heap-Based Memory Corruption due to Malformed TTF Font

We have observed the following access violation exception in the latest version of Adobe Acrobat Reader DC for Windows, when opening a malformed PDF file: --- cut --- 4c84.1e3c: Access violation - code c0000005 first chance First chance exceptions are reported before any exception handling. This...

Microsoft Font Subsetting - DLL Heap-Based Out-of-Bounds read in GetGlyphIdx

Microsoft Font Subsetting - DLL Heap-Based Out-of-Bounds read in GetGlyphIdx -----===== Background =====----- The Microsoft Font Subsetting DLL fontsub.dll is a default Windows helper library for subsetting TTF fonts; i.e. converting fonts to their more compact versions based on the specific glyp...

Microsoft Font Subsetting - DLL Heap-Based Out-of-Bounds read in WriteTableFromStructure

Microsoft Font Subsetting - DLL Heap-Based Out-of-Bounds read in WriteTableFromStructure -----===== Background =====----- The Microsoft Font Subsetting DLL fontsub.dll is a default Windows helper library for subsetting TTF fonts; i.e. converting fonts to their more compact versions based on the...

Microsoft Font Subsetting - DLL Heap Corruption in ReadTableIntoStructure

Microsoft Font Subsetting - DLL Heap Corruption in ReadTableIntoStructure -----===== Background =====----- The Microsoft Font Subsetting DLL fontsub.dll is a default Windows helper library for subsetting TTF fonts; i.e. converting fonts to their more compact versions based on the specific glyphs...

Microsoft Font Subsetting - DLL Heap Corruption in MakeFormat12MergedGlyphList

Microsoft Font Subsetting - DLL Heap Corruption in MakeFormat12MergedGlyphList -----===== Background =====----- The Microsoft Font Subsetting DLL fontsub.dll is a default Windows helper library for subsetting TTF fonts; i.e. converting fonts to their more compact versions based on the specific...

Microsoft Font Subsetting - DLL Heap-Based Out-of-Bounds read in GetGlyphIdx

-----===== Background =====----- The Microsoft Font Subsetting DLL fontsub.dll is a default Windows helper library for subsetting TTF fonts; i.e. converting fonts to their more compact versions based on the specific glyphs used in the document where the fonts are embedded. It is used by Windows G...

Adobe Acrobat Reader DC for Windows - Heap-Based Memory Corruption due to Malformed TTF Font

Adobe Acrobat Reader DC for Windows - Heap-Based Memory Corruption due to Malformed TTF Font We have observed the following access violation exception in the latest version of Adobe Acrobat Reader DC for Windows, when opening a malformed PDF file: --- cut --- 4c84.1e3c: Access violation - code...

Microsoft Font Subsetting - DLL Heap Corruption in FixSbitSubTables

Microsoft Font Subsetting - DLL Heap Corruption in FixSbitSubTables -----===== Background =====----- The Microsoft Font Subsetting DLL fontsub.dll is a default Windows helper library for subsetting TTF fonts; i.e. converting fonts to their more compact versions based on the specific glyphs used i...

Microsoft Font Subsetting - DLL Heap Corruption in MakeFormat12MergedGlyphList

-----===== Background =====----- The Microsoft Font Subsetting DLL fontsub.dll is a default Windows helper library for subsetting TTF fonts; i.e. converting fonts to their more compact versions based on the specific glyphs used in the document where the fonts are embedded. It is used by Windows G...

Microsoft Font Subsetting - DLL Heap Corruption in ReadTableIntoStructure

-----===== Background =====----- The Microsoft Font Subsetting DLL fontsub.dll is a default Windows helper library for subsetting TTF fonts; i.e. converting fonts to their more compact versions based on the specific glyphs used in the document where the fonts are embedded. It is used by Windows G...

Microsoft Font Subsetting - DLL Heap Corruption in ComputeFormat4CmapData

Microsoft Font Subsetting - DLL Heap Corruption in ComputeFormat4CmapData -----===== Background =====----- The Microsoft Font Subsetting DLL fontsub.dll is a default Windows helper library for subsetting TTF fonts; i.e. converting fonts to their more compact versions based on the specific glyphs...

Microsoft Font Subsetting - DLL Heap Corruption in ComputeFormat4CmapData Vulnerability

Microsoft Font Subsetting - DLL Heap Corruption in ComputeFormat4CmapData -----===== Background =====----- The Microsoft Font Subsetting DLL fontsub.dll is a default Windows helper library for subsetting TTF fonts; i.e. converting fonts to their more compact versions based on the specific glyphs...