CVE-2019-19308: NULL Pointer Dereference

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 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...

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 ---...

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 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 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-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-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-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 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...

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...

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...

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 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-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...

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...

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...

Oracle Java Runtime Environment - Heap Corruption During TTF font Rendering in GlyphIterator

Oracle Java Runtime Environment - Heap Corruption During TTF font Rendering in GlyphIterator::setCurrGlyphID A heap corruption was observed in Oracle Java Runtime Environment version 8u202 latest at the time of this writing while fuzz-testing the processing of TrueType fonts. It manifests itself ...