CVE-2021-35247:SolarWinds Serv-U LDAP Authentication Input Validation Vulnerability

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Description Preview

CVE-2021-35247 affects SolarWinds Serv-U's web login screen when using LDAP authentication. The vulnerability stems from insufficient sanitization of user input characters during the LDAP authentication process. While no downstream effects were detected as LDAP servers typically ignore improper characters, this vulnerability could potentially lead to security issues if exploited.

Overview

The vulnerability exists in the SolarWinds Serv-U web login screen when authenticating against LDAP servers. The application was not properly validating and sanitizing input characters during the authentication process. This insufficient input validation could potentially allow attackers to manipulate authentication requests. Although SolarWinds notes that no downstream effects were detected because LDAP servers generally ignored improper characters, the vulnerability represents a security weakness that needed to be addressed. The issue affects Serv-U versions prior to 15.3.

Remediation

SolarWinds has addressed this vulnerability by implementing additional validation and sanitization mechanisms for the input handling during LDAP authentication. Users are strongly recommended to update to Serv-U version 15.3 or later to ensure proper input validation is performed in all environments. Organizations should prioritize this update to mitigate any potential security risks associated with this vulnerability.

References

  1. SolarWinds Serv-U 15.3 Release Notes: https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-3_release_notes.htm

  2. SolarWinds Security Advisory for CVE-2021-35247: https://www.solarwinds.com/trust-center/security-advisories/cve-2021-35247 (Note: This link may be broken or updated since the initial advisory)

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

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