Muhammara has a NULL pointer dereference in LZWDecode filter when DecodeParms omits EarlyChange key

Summary A NULL pointer dereference vulnerability exists in PDFParser::CreateFilterForStream when processing a PDF stream with /Filter /LZWDecode and a /DecodeParms dictionary that does not contain the EarlyChange key. This causes an access violation 0xC0000005 and crashes the process. Affected...