蚂蚁分类getshell

from:[90sec](https://forum.90sec.org/forum.php?mod=viewthread&tid=10393&extra=page%3D1 "90sec") /member/include/inc_shop.php ```php if($if_corp == 1){ //??????????? if($ac == 'base'){ if(empty($tname)) write_msg('','?m=shop&type=corp&error=39'); if(empty($areaid)) write_msg('','?m=shop&type=corp&error=40'); $db -> query("UPDATE `{$db_mymps}member` SET tname='$tname',catid='$catids',areaid='$areaid',introduce='$introduce',address='$address',busway='$busway',mappoint='$mappoint',msn='$msn',web='$web' $where AND if_corp = '1'"); write_msg('','?m=shop&type=corp&success=13'); } elseif($ac == 'template') { if($_FILES[$name_file]['name']){ require_once MYMPS_INC.'/upfile.fun.php'; $destination = "/banner/".date('Ym')."/"; $mymps_image = start_upload($name_file,$destination,0,'','',$oldbanner,''); ``` 前面的ac不用管就是if判断然后进入操作而已。我们主要看template这里,获取$name_file的上传内容然后传入start_upload,这里说一下传参中可控的有$oldbanner 看下函数内容 ```php function start_upload( $file_name, $destination_folder, $watermark = 0, $limit_width = "", $limit_height = "", $edit_filename = "", $edit_pre_filename = "" ) { global $mymps_global; global $timestamp; if ( !is_uploaded_file( $_FILES[$file_name]['tmp_name'] ) ) { write_msg( "请重新选择您要上传的图片!" ); } $file = $_FILES[$file_name]; @createdir( MYMPS_UPLOAD.$destination_folder ); $file_name = $file['tmp_name']; $pinfo = pathinfo( $file['name'] ); $ftype = $pinfo['extension']; $fname = $pinfo[basename]; if ( empty( $edit_filename ) && empty( $edit_pre_filename ) ) { $destination_file = $timestamp.random( ).".".$ftype; $destination = MYMPS_UPLOAD.$destination_folder.$destination_file; $small_destination = MYMPS_UPLOAD.$destination_folder."pre_".$destination_file; } else { $destination = MYMPS_ROOT.$edit_filename; $small_destination = MYMPS_ROOT.$edit_pre_filename; $forbidarray = array( MYMPS_ROOT."/images/logo.gif", MYMPS_ROOT."/images/nopic.gif", MYMPS_ROOT."/images/nophoto.jpg", MYMPS_ROOT."/images/noavatar.gif", MYMPS_ROOT."/images/noavatar_small.gif" ); if ( !in_array( $destination, $forbidarray ) || $destination != MYMPS_ROOT ) { @unlink( $destination ); } if ( !in_array( $small_destination, $forbidarray ) || $destination != MYMPS_ROOT ) { @unlink( $small_destination ); } unset( $forbidarray ); } if ( file_exists( $destination ) ) { write_msg( "同名图片已存在,请重新选择您要上传的图片!" ); } if ( !move_uploaded_file( $file_name, $destination ) ) { write_msg( "图片上传失败,请重新选择您要上传的图片!" ); } ``` 看这里 ```php $file = $_FILES[$file_name]; @createdir( MYMPS_UPLOAD.$destination_folder ); $file_name = $file['tmp_name']; $pinfo = pathinfo( $file['name'] ); $ftype = $pinfo['extension']; $fname = $pinfo[basename]; ``` 先是获取了文件内容然后获取了文件后缀以及文件名这些 ```php { $destination = MYMPS_ROOT.$edit_filename; $small_destination = MYMPS_ROOT.$edit_pre_filename; $forbidarray = array( MYMPS_ROOT."/images/logo.gif", MYMPS_ROOT."/images/nopic.gif", MYMPS_ROOT."/images/nophoto.jpg", MYMPS_ROOT."/images/noavatar.gif", MYMPS_ROOT."/images/noavatar_small.gif" ); ``` 这里的edit与edit_pre讲道理的是非空所以进入了该if进行后缀以及路径拼接(期间并无任何效验) ```php

if ( file_exists( $destination ) )

{

write_msg( "同名图片已存在,请重新选择您要上传的图片!" );

}

if ( !move_uploaded_file( $file_name, $destination ) )

{

write_msg( "图片上传失败,请重新选择您要上传的图片!" );

}

``` 下面接着判断了是否存在相同名如果不存在同名则直接上传。 本地复现: Old我们指定的文件名 不过印象中我并不记得蚂蚁分类会存在这个漏洞啊!!抱着各种心情多看一下.随便看一个 发现除了我们那个每个上面都会有一个check_upimage的调用 看看怎么回事

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