CVE-2024-38108 Overview
CVE-2024-38108 is a critical spoofing vulnerability affecting Microsoft Azure Stack Hub. This vulnerability is classified under CWE-79 (Cross-Site Scripting), indicating that attackers can inject malicious scripts into web pages viewed by other users. The vulnerability allows network-based exploitation with no privileges required, though it does require user interaction to be successful.
Critical Impact
This cross-site scripting vulnerability in Azure Stack Hub could allow attackers to spoof content or steal sensitive information from authenticated users, potentially compromising the integrity and confidentiality of hybrid cloud environments.
Affected Products
- Microsoft Azure Stack Hub (all versions prior to the security update)
Discovery Timeline
- August 13, 2024 - CVE-2024-38108 published to NVD
- August 16, 2024 - Last updated in NVD database
Technical Details for CVE-2024-38108
Vulnerability Analysis
This vulnerability stems from improper input validation that allows cross-site scripting (XSS) attacks against Azure Stack Hub deployments. The attack vector is network-based with low complexity, meaning that remote attackers can potentially exploit this vulnerability without requiring special privileges. However, successful exploitation requires user interaction, such as clicking a malicious link or visiting a compromised page.
The scope is changed (S:C in CVSS vector), indicating that the vulnerable component impacts resources beyond its security scope. This means an attacker exploiting this XSS vulnerability in Azure Stack Hub could potentially affect other components or services within the hybrid cloud environment. The vulnerability allows for high impact to both confidentiality and integrity, enabling attackers to potentially steal sensitive data or modify content displayed to users.
Root Cause
The root cause is improper neutralization of input during web page generation (CWE-79). Azure Stack Hub fails to properly sanitize user-supplied input before including it in output that is subsequently rendered in users' browsers. This allows attackers to inject arbitrary JavaScript code that executes within the context of the victim's authenticated session.
Attack Vector
The attack follows a typical reflected or stored XSS pattern. An attacker crafts malicious input containing JavaScript code and delivers it to the target Azure Stack Hub environment. When a legitimate user interacts with the malicious content, the injected script executes in their browser context. Due to the changed scope characteristic, the malicious script can potentially access resources or perform actions across security boundaries, making this particularly dangerous in enterprise hybrid cloud deployments.
The vulnerability can be exploited without authentication (PR:N), meaning any attacker with network access to the Azure Stack Hub portal can attempt exploitation. The successful attack depends on a user being tricked into interacting with the malicious payload (UI:R).
Detection Methods for CVE-2024-38108
Indicators of Compromise
- Unusual JavaScript or encoded script payloads in Azure Stack Hub web requests
- Suspicious URL parameters containing <script> tags or encoded JavaScript
- Unexpected cross-origin requests originating from Azure Stack Hub user sessions
- Reports from users about unexpected behavior or redirects within the portal
Detection Strategies
- Implement web application firewall (WAF) rules to detect XSS patterns targeting Azure Stack Hub endpoints
- Monitor Azure Stack Hub access logs for requests containing typical XSS payloads such as <script>, javascript:, or encoded variants
- Deploy browser-based security controls to detect and block inline script execution from untrusted sources
- Configure SIEM alerts for anomalous user session behavior following interactions with suspicious URLs
Monitoring Recommendations
- Enable detailed logging for all Azure Stack Hub web portal access and review for injection attempts
- Monitor for unusual administrative actions that could indicate session hijacking following XSS exploitation
- Implement content security policy (CSP) violation monitoring to detect attempted script injections
- Track authentication events for signs of credential theft or session token abuse
How to Mitigate CVE-2024-38108
Immediate Actions Required
- Apply the Microsoft security update for Azure Stack Hub immediately
- Audit recent Azure Stack Hub access logs for potential exploitation attempts
- Notify users to be cautious of unexpected links or communications referencing Azure Stack Hub
- Review and strengthen Content Security Policy headers if custom configurations are in place
Patch Information
Microsoft has released a security update to address this vulnerability. Administrators should consult the Microsoft Security Update Guide for CVE-2024-38108 for detailed patching instructions and download the appropriate update for their Azure Stack Hub deployment. Given the critical severity rating, organizations should prioritize this update in their patch management cycle.
Workarounds
- Implement strict Content Security Policy (CSP) headers to restrict script execution to trusted sources only
- Deploy additional input validation and output encoding at the network perimeter using a web application firewall
- Limit network access to Azure Stack Hub administrative interfaces to trusted networks only
- Educate users about recognizing and avoiding suspicious links that may lead to XSS exploitation
- Consider implementing browser isolation technologies for users accessing Azure Stack Hub portals
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
