CVE-2024-45354

Executive Summary

CVE-2024-45354 is a code execution vulnerability in the Xiaomi shop application product. The vulnerability arises from improper input validation, which could allow an attacker to execute malicious code. With a CVSS score of 4.3 (Medium), the risk is moderate, but the lack of a known patch and the potential for code execution make it a concern for Xiaomi users. The EPSS score is 0.0%, indicating low exploitation likelihood currently, but this may change as more details emerge.

Supply Chain & Package Security

This vulnerability is not related to NPM, PyPI, Go, or Ruby packages. It is a proprietary application vulnerability in the Xiaomi shop application.

CVSS Breakdown & Threat Level

• CVSS Score: 4.3 (Medium)
• Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
• Attack Vector: Network (AV:N) – The vulnerability can be exploited remotely.
• Attack Complexity: Low (AC:L) – No special conditions are required.
• Privileges Required: None (PR:N) – No authentication needed.
• User Interaction: Required (UI:R) – The victim must interact with the malicious input.
• Scope: Unchanged (S:U) – The vulnerability does not affect other components.
• Confidentiality Impact: None (C:N) – No data exposure.
• Integrity Impact: Low (I:L) – Some modification of data is possible.
• Availability Impact: None (A:N) – No denial of service.

Threat Level: Medium. The vulnerability requires user interaction and has limited impact, but code execution could be leveraged for further attacks.

Deep Dive & Mechanics

The vulnerability is caused by improper input validation in the Xiaomi shop application. This means the application does not properly sanitize or validate user-supplied input before processing it. An attacker can craft a malicious input (e.g., a specially crafted URL, file, or data payload) that, when processed by the application, leads to code execution.

The exact mechanism is not publicly detailed, but typical scenarios include:

• Injection flaws: The input is interpreted as code (e.g., JavaScript, SQL, or OS commands).
• Deserialization issues: The application deserializes untrusted data without validation.
• Path traversal: The input allows access to restricted files or directories.

Since the application is a shop app, the attack vector likely involves user interaction, such as clicking a malicious link or opening a crafted file.

Vulnerable vs. Patched Code

No specific code samples are available due to the proprietary nature of the application. However, the vulnerability is in the input validation logic. A patched version would include proper input sanitization, validation, and encoding.

Vulnerable Code (Conceptual):

// Vulnerable: Directly uses user input without validation
function processInput(userInput) {
    eval(userInput); // Executes arbitrary code
}

Patched Code (Conceptual):

// Patched: Validates and sanitizes input
function processInput(userInput) {
    const sanitized = sanitizeInput(userInput);
    // Use safe methods instead of eval
    document.getElementById('output').innerText = sanitized;
}

Exploitation & Lab Setup

Red Team (Offensive)

Objective: Exploit the vulnerability to execute arbitrary code on a target system.

Prerequisites:

• A vulnerable version of the Xiaomi shop application.
• User interaction (e.g., clicking a link).

Exploitation Steps:

1. Identify the vulnerable input field (e.g., search bar, product review).
2. Craft a payload that bypasses input validation (e.g., using JavaScript injection).
3. Deliver the payload via a phishing email or malicious website.
4. When the victim interacts with the payload, the code executes.

Example Payload (Conceptual):

// Payload for code execution
<script>alert('XSS')</script>

Note: No public exploit code is available. This is a conceptual example.

Blue Team (Defensive)

Objective: Detect and prevent exploitation.

Detection:

• Monitor for unusual input patterns (e.g., script tags, SQL commands).
• Use Web Application Firewalls (WAF) to block malicious payloads.
• Enable logging for all user inputs and application errors.

Prevention:

• Apply input validation and output encoding.
• Use Content Security Policy (CSP) headers.
• Keep the application updated.

Indicators of Compromise (IOCs)

• Network IOCs:
  • Unusual HTTP requests containing script tags or SQL commands.
  • Connections to known malicious IPs or domains.
• File IOCs:
  • Unexpected files created in the application directory.
  • Modified application binaries or configuration files.
• Behavioral IOCs:
  • Application crashes or unexpected behavior.
  • Unauthorized code execution (e.g., spawning processes).

Detection Engineering

YARA Rule

rule Xiaomi_Shop_Code_Execution_CVE_2024_45354 {
    meta:
        description = "Detects potential exploitation of CVE-2024-45354 in Xiaomi shop application"
        author = "Valters IT"
        date = "2025-04-10"
        hash = "unknown"
    strings:
        $s1 = "eval("
        $s2 = "exec("
        $s3 = "system("
        $s4 = "shell_exec("
        $s5 = "passthru("
    condition:
        any of ($s*) and filesize < 10MB
}

Sigma Rule

title: Xiaomi Shop Application Code Execution Attempt
id: xiaomi_shop_code_execution
status: experimental
description: Detects attempts to exploit CVE-2024-45354 via malicious input
author: Valters IT
logsource:
    category: application
    product: xiaomi_shop
detection:
    selection:
        - Input contains "eval("
        - Input contains "exec("
        - Input contains "system("
        - Input contains "shell_exec("
        - Input contains "passthru("
    condition: selection
falsepositives:
    - Legitimate use of these functions in admin interfaces
level: high

Suricata Rule

alert http any any -> any any (msg:"Xiaomi Shop Code Execution Attempt"; flow:to_server; content:"eval("; nocase; classtype:attempted-user; sid:1000001; rev:1;)
alert http any any -> any any (msg:"Xiaomi Shop Code Execution Attempt"; flow:to_server; content:"exec("; nocase; classtype:attempted-user; sid:1000002; rev:1;)
alert http any any -> any any (msg:"Xiaomi Shop Code Execution Attempt"; flow:to_server; content:"system("; nocase; classtype:attempted-user; sid:1000003; rev:1;)
alert http any any -> any any (msg:"Xiaomi Shop Code Execution Attempt"; flow:to_server; content:"shell_exec("; nocase; classtype:attempted-user; sid:1000004; rev:1;)
alert http any any -> any any (msg:"Xiaomi Shop Code Execution Attempt"; flow:to_server; content:"passthru("; nocase; classtype:attempted-user; sid:1000005; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Update the application: Check for patches from Xiaomi.
2. Input validation: Implement strict input validation and output encoding.
3. Web Application Firewall (WAF): Deploy a WAF to block malicious payloads.
4. User education: Train users not to click on suspicious links.

Long-term Measures:

• Code review: Conduct a security audit of the application.
• Penetration testing: Regularly test for vulnerabilities.
• Security updates: Keep all software up to date.

Workarounds:

• Disable unnecessary features that accept user input.
• Use a sandboxed environment for the application.

Valters IT