CVE-2024-8355

Executive Summary

CVE-2024-8355 is a critical SQL injection vulnerability in the Visteon Infotainment System’s DeviceManager component, specifically within the iAP Serial Number parsing logic. The flaw allows a physically present attacker to inject arbitrary SQL queries, leading to code execution with root privileges. Authentication is not required, making this a high-severity local attack vector. The vulnerability was reported via ZDI-CAN-20112 and currently has no known patch or public exploit. The EPSS score is 0.0%, indicating low exploitation likelihood in the wild, but the physical access requirement limits the attack surface to in-vehicle scenarios.

CVSS Breakdown & Threat Level

• CVSS Score: 6.8 (Medium)
• Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
• Attack Vector: Physical (AV:P) – attacker must have physical access to the infotainment system.
• 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) – vulnerability does not affect other components.
• Confidentiality, Integrity, Availability: High (C:H/I:H/A:H) – full compromise of the system.

Threat Level: Medium due to physical access requirement, but impact is severe (root-level code execution).

Deep Dive & Mechanics

The vulnerability resides in the DeviceManager service of Visteon Infotainment systems. When processing the iAP (iPod Accessory Protocol) serial number, the software fails to sanitize user-supplied input before constructing SQL queries. This allows an attacker to inject malicious SQL statements by crafting a specially formatted serial number string.

Root Cause: The application uses string concatenation or interpolation to build SQL queries without parameterized statements or input validation. For example, a query like SELECT * FROM devices WHERE serial = ' + user_input + ' can be exploited by providing ' OR '1'='1 or other SQL injection payloads.

Attack Flow:

1. Attacker gains physical access to the vehicle’s infotainment system (e.g., via USB port or diagnostic interface).
2. Attacker sends a crafted iAP serial number containing SQL injection payload.
3. DeviceManager executes the malicious SQL query, potentially extracting data, modifying records, or executing stored procedures.
4. The SQL injection can be leveraged to execute operating system commands via SQLite’s load_extension or similar features, achieving root-level code execution.

Impact: Full control over the infotainment system, including access to vehicle data, audio, navigation, and potentially CAN bus interfaces.

Vulnerable vs. Patched Code

Vulnerable Code (Conceptual):

// DeviceManager.c
void process_iAP_serial(char *serial) {
    char query[256];
    sprintf(query, "SELECT * FROM devices WHERE serial = '%s'", serial);
    sqlite3_exec(db, query, callback, 0, &err);
}

Patched Code (Conceptual):

// DeviceManager.c
void process_iAP_serial(char *serial) {
    sqlite3_stmt *stmt;
    sqlite3_prepare_v2(db, "SELECT * FROM devices WHERE serial = ?", -1, &stmt, 0);
    sqlite3_bind_text(stmt, 1, serial, -1, SQLITE_TRANSIENT);
    sqlite3_step(stmt);
    sqlite3_finalize(stmt);
}

Key Difference: The patched version uses parameterized queries (prepared statements) to separate SQL logic from data, preventing injection.

Exploitation & Lab Setup

Red Team

Prerequisites:

• Physical access to a Visteon Infotainment system (e.g., in a vehicle or test bench).
• USB or diagnostic interface to send iAP serial number data.

Exploitation Steps:

1. Connect to the infotainment system via USB (iAP protocol).
2. Send a crafted serial number payload, e.g., ' UNION SELECT 1,2,3,4,5,6,7,8,9,10--.
3. Observe SQL errors or data exfiltration to confirm injection.
4. Use SQLite-specific payloads to execute commands:

   '; ATTACH DATABASE '/tmp/evil.db' AS evil; CREATE TABLE evil.cmd (data TEXT); INSERT INTO evil.cmd VALUES ('test');--
   

5. For code execution, use load_extension if SQLite is compiled with extension loading:

   '; SELECT load_extension('/path/to/malicious.so');--
   

Lab Setup:

• Use a virtualized Visteon system or a real head unit in a controlled environment.
• Tools: sqlmap with --sqlite flag, custom Python script to send iAP serials.

Blue Team

Detection:

• Monitor for unusual SQL errors in system logs (e.g., sqlite3_exec failures).
• Look for unexpected file writes or process executions from the DeviceManager service.
• Use file integrity monitoring on SQLite databases.

Prevention:

• Ensure input validation on all iAP serial numbers (allow only alphanumeric characters).
• Apply principle of least privilege to the DeviceManager process.
• Disable SQLite extension loading if not needed.

Indicators of Compromise (IOCs)

• File Artifacts:
  • /tmp/evil.db or similar unexpected SQLite databases.
  • Modified SQLite databases in /var/lib/visteon/.
• Process Anomalies:
  • DeviceManager spawning unexpected child processes (e.g., /bin/sh).
• Network Indicators:
  • Outbound connections from the infotainment system to unknown IPs (if code execution enables network access).
• Log Entries:
  • SQLite error messages containing injection patterns (e.g., UNION, SELECT, ATTACH).

Detection Engineering

YARA Rule

rule CVE_2024_8355_SQLi_Serial {
    meta:
        description = "Detects SQL injection attempts in iAP serial number strings"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2024-8355"
    strings:
        $sqli1 = /'(\s*OR\s*|\s*AND\s*|\s*UNION\s*|\s*SELECT\s*|\s*ATTACH\s*)/i
        $sqli2 = /(\s*--\s*|\s*#\s*|\s*\/\*)/i
        $sqli3 = /load_extension/i
    condition:
        any of ($sqli*) and filesize < 1MB
}

Sigma Rule

title: CVE-2024-8355 SQL Injection in Visteon DeviceManager
id: 7a8b9c0d-1e2f-3a4b-5c6d-7e8f9a0b1c2d
status: experimental
description: Detects SQL injection patterns in iAP serial number processing logs
author: Valters IT
logsource:
    product: linux
    service: syslog
detection:
    selection:
        - EventID: 1  # Process creation
          CommandLine|contains: 'sqlite3'
        - EventID: 2  # File creation
          TargetFilename|contains: '.db'
        - Message|contains|all:
            - 'serial'
            - 'SQL error'
    condition: selection
falsepositives:
    - Legitimate SQLite operations
level: high

Suricata Rule

alert tcp any any -> any any (msg:"CVE-2024-8355 SQL Injection Attempt"; flow:to_server,established; content:"serial"; nocase; content:"'"; distance:0; within:100; pcre:"/(OR|AND|UNION|SELECT|ATTACH|load_extension)/i"; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Isolate the system: Disconnect the infotainment system from any critical vehicle networks (e.g., CAN bus) if possible.
2. Input validation: Implement strict allowlist validation for iAP serial numbers (only alphanumeric characters).
3. Parameterized queries: Rewrite all SQL queries in DeviceManager to use prepared statements.

Long-term Fix:

• Vendor must release a firmware update that replaces string concatenation with parameterized queries.
• Apply code review for all input handling in the infotainment system.

Workarounds:

• Disable iAP serial number processing if not required.
• Use a Web Application Firewall (WAF) or IDS at the vehicle network level.

Valters IT
DevSecOps & Cyber Threat Intelligence