CVE-2023-21570:Microsoft Dynamics 365 (on-premises) Cross-site Scripting Vulnerability (CVE-2023-21570)

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CVE-2023-21570 identifies a Cross-site Scripting (XSS) vulnerability in Microsoft Dynamics 365 (on-premises). This vulnerability allows an attacker to inject malicious scripts that can execute when viewed by other users, potentially leading to information disclosure, session hijacking, or other client-side attacks. The vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation).

Overview

This vulnerability affects Microsoft Dynamics 365 in on-premises deployments. Cross-site scripting vulnerabilities occur when an application does not properly validate, filter, or encode user-controllable input before including it in web page output. In this case, the vulnerability could allow an attacker to inject client-side scripts that execute when other users access affected pages within Dynamics 365. Successful exploitation could enable attackers to steal sensitive information, manipulate content, redirect users to malicious sites, or perform actions with the victim's privileges within the application.

Remediation

Organizations using Microsoft Dynamics 365 (on-premises) should:

  1. Apply the security updates provided by Microsoft as soon as possible
  2. Follow the guidance in the Microsoft Security Response Center (MSRC) advisory
  3. Implement input validation and output encoding practices for any custom code interacting with Dynamics 365
  4. Consider implementing Content Security Policy (CSP) headers to provide an additional layer of protection against XSS attacks
  5. Regularly review user privileges to minimize the impact of potential exploitation
  6. Monitor system logs for unusual activity that might indicate exploitation attempts

References

  1. Microsoft Security Response Center (MSRC) Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21570
  2. Common Weakness Enumeration (CWE-79): https://cwe.mitre.org/data/definitions/79.html
  3. OWASP Cross-Site Scripting Prevention Cheat Sheet: https://cheatsheetseries.owasp.org/cheatsheets/Cross_Site_Scripting_Prevention_Cheat_Sheet.html
  4. Microsoft Dynamics 365 Security Documentation: https://docs.microsoft.com/en-us/dynamics365/security/

Industry ExposureMost to least
This section illustrates the prevalence of a specific Common Vulnerabilities and Exposures (CVE) across various industries based on customer reports. The ranking displays industries from the most to least affected by this particular vulnerability, offering valuable insight into where this CVE has been most frequently observed. This information can help organizations within these sectors prioritize their security efforts, understand their relative risk exposure compared to their peers, and focus remediation strategies where they are most needed. By understanding the industry-specific impact, organizations can make more informed decisions regarding patching, resource allocation, and overall risk management related to this CVE.

  1. Public Administration: Low
    Public Administration
  2. Educational Services: Low
    Educational Services
  3. Other Services (except Public Administration): Low
    Other Services (except Public Administration)
  4. Accommodation & Food Services: Low
    Accommodation & Food Services
  5. Administrative, Support, Waste Management & Remediation Services: Low
    Administrative, Support, Waste Management & Remediation Services
  6. Agriculture, Forestry Fishing & Hunting: Low
    Agriculture, Forestry Fishing & Hunting
  7. Arts, Entertainment & Recreation: Low
    Arts, Entertainment & Recreation
  8. Construction: Low
    Construction
  9. Finance and Insurance: Low
    Finance and Insurance
  10. Health Care & Social Assistance: Low
    Health Care & Social Assistance
  11. Information: Low
    Information
  12. Management of Companies & Enterprises: Low
    Management of Companies & Enterprises
  13. Manufacturing: Low
    Manufacturing
  14. Mining: Low
    Mining
  15. Professional, Scientific, & Technical Services: Low
    Professional, Scientific, & Technical Services
  16. Real Estate Rental & Leasing: Low
    Real Estate Rental & Leasing
  17. Retail Trade: Low
    Retail Trade
  18. Transportation & Warehousing: Low
    Transportation & Warehousing
  19. Utilities: Low
    Utilities
  20. Wholesale Trade: Low
    Wholesale Trade

Focus on What Matters

  1. See Everything.
  2. Identify True Risk.
  3. Proactively Mitigate Threats.

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