CVE-2025-31965: HCL BigFix Remote Control Server WebUI Information Disclosure Vulnerability
This blog post provides an overview of CVE-2025-31965, a security vulnerability affecting HCL BigFix Remote Control Server WebUI. This flaw allows non-administrative users to access unauthorized information, potentially leading to further security compromises.
Vulnerability Details
- CVE ID: CVE-2025-31965
- Description: Improper access restrictions in HCL BigFix Remote Control Server WebUI (versions 10.1.0.0248 and lower) allow non-admin users to view unauthorized information on certain web pages.
- CVSS Score and Vector: CVSS 3.1 score of 8.2 (HIGH). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:L. This means the vulnerability is accessible over the network, requires low privileges and user interaction, and has a changed scope. The impact is limited confidentiality, high integrity impact, and limited availability impact. In simpler terms, an attacker can potentially modify important data and cause some disruption, but cannot access sensitive data extensively.
- Exploit Requirements: A low-privileged user account and some user interaction (e.g., clicking a link).
- Affected Vendor, Product, Version: HCL, BigFix Remote Control Server WebUI, versions 10.1.0.0248 and lower.
- CWE: CWE-305 - Authentication Bypass Through Primary Defect. This means the vulnerability stems from a flaw in the authentication or authorization mechanism, allowing an attacker to bypass intended access controls.
Timeline of Events
- Received: 2025-07-29
Exploitability & Real-World Risk
While the CVSS score is high, the need for user interaction slightly lowers the immediate risk. However, in environments where users frequently access the BigFix Remote Control Server WebUI, the likelihood of exploitation increases. An attacker could potentially leverage this vulnerability to escalate privileges or gain unauthorized access to sensitive systems by manipulating the data they can access.
Recommendations
- Apply the Patch: Upgrade to a version of HCL BigFix Remote Control Server WebUI that addresses this vulnerability. Refer to the HCL advisory for specific patch details.
- Review User Permissions: Regularly review and enforce the principle of least privilege for all user accounts accessing the BigFix Remote Control Server WebUI.
- Implement Monitoring: Monitor access logs for suspicious activity that may indicate exploitation attempts.
Technical Insight
The vulnerability likely stems from improper validation or filtering of user roles when accessing certain web pages within the BigFix Remote Control Server WebUI. This allows users with insufficient privileges to view data they should not have access to. The underlying code probably fails to correctly enforce access controls based on user roles.
Credit to Researcher(s)
Credit for discovering this vulnerability goes to the HCL Security Team.
References
Tags
#HCLBigFix #RemoteControlServer #WebUI #InformationDisclosure #CVE-2025-31965 #Security #Vulnerability #CWE-305
Summary: CVE-2025-31965 is an information disclosure vulnerability in HCL BigFix Remote Control Server WebUI that allows non-admin users to view unauthorized information. The vulnerability has a CVSS score of 8.2 and requires user interaction for exploitation. Users are advised to apply the latest patch and review user permissions.
CVE ID: CVE-2025-31965
Risk Analysis: Successful exploitation can lead to unauthorized access to sensitive information, privilege escalation, and potential compromise of the affected system. The business impact includes potential data breaches and reputational damage.
Recommendation: Apply the latest patch provided by HCL and review user permissions to ensure users have only the necessary privileges.
Timeline
- 2025-07-29: Vulnerability reported and CVE ID assigned.