CVE-2024-56361 – tltneon/lgsl

Package

Manager: composer
Name: tltneon/lgsl
Vulnerable Version: >=0 <7.0.0

Severity

Level: High

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N/E:H/RL:U/RC:R

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

EPSS: 0.00189 pctl0.40908

Details

lgsl Stored Cross-Site Scripting vulnerability ### Summary A stored cross-site scripting (XSS) vulnerability was identified in lgsl. The issue arises from improper sanitation of user input. Everyone who accesses this page will be affected by this attack. ### Details The function `lgsl_query_40` in `lgsl_protocol.php` has implemented an HTTP crawler. This function makes a request to the registered game server, and upon crawling the malicious `/info` endpoint with our payload, will render our javascript on the info page. This information is being displayed via `lgsl_details.php` #### Affected Code: ```php foreach ($server['e'] as $field => $value) { $value = preg_replace('/((https*:\/\/|https*:\/\/www\.|www\.)[\w\d\.\-\/=$?​]*)/i', "<a href='$1' target='_blank'>$1</a>", html_entity_decode($value)); $output .= " <tr><td> {$field} </td><td> {$value} </td></tr>"; } ``` ### PoC 1. Create a game server with type `eco` and set the target host and port accordingly to your ttack server. I have crafted this json payload that is being parsed according to the schema and being served on `/info` 2. Serve the following JSON payload at `/info` on your handler ```json { "Animals": "1", "EconomyDesc": "<img src=x onerror=prompt(1)>" } ``` 3. Access the corresponding server info page at `/s?=`. Upon refreshing & crawling our server, it should execute our javascript.

Metadata

Created: 2024-12-26T20:20:12Z
Modified: 2024-12-27T00:32:07Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/12/GHSA-xx95-62h6-h7v3/GHSA-xx95-62h6-h7v3.json
CWE IDs: ["CWE-79"]
Alternative ID: GHSA-xx95-62h6-h7v3
Finding: F425
Auto approve: 1