CVE-2018-6324 in Radar
Summary
by MITRE
F-Secure Radar (on-premises) before 2018-02-15 has an Unvalidated Redirect via the ReturnUrl parameter that triggers upon a user login.
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Analysis
by VulDB Data Team • 06/30/2024
F-Secure Radar represents a security management platform designed for on-premises deployment that provides threat intelligence and security monitoring capabilities. The vulnerability identified as CVE-2018-6324 affects versions of this platform released prior to February 15, 2018, creating a significant security risk through an insecure direct object reference flaw. This vulnerability specifically manifests through the ReturnUrl parameter within the authentication flow, allowing attackers to manipulate the redirect behavior during user login processes. The flaw enables malicious actors to craft specially crafted URLs that would redirect authenticated users to arbitrary external domains without proper validation or sanitization of the redirect target.
The technical implementation of this vulnerability stems from insufficient input validation within the authentication module of F-Secure Radar. When users attempt to log into the system, the application accepts a ReturnUrl parameter that specifies where users should be redirected after successful authentication. The system fails to validate whether this target URL belongs to the trusted domain or if it points to an external malicious domain. This validation failure creates an open redirect vulnerability that falls under the CWE-601 category, specifically classified as Unvalidated Redirects or Forwards. Attackers can exploit this by constructing malicious URLs containing the ReturnUrl parameter with crafted external URLs, potentially leading to phishing attacks or credential theft.
The operational impact of this vulnerability extends beyond simple redirect manipulation and presents a substantial risk to user security and organizational integrity. When authenticated users are redirected to malicious domains, they may unknowingly provide credentials to attackers through phishing pages that appear legitimate. This vulnerability directly enables social engineering attacks by leveraging the trust relationship established during the authentication process. The attack vector aligns with ATT&CK technique T1566.001, which covers Phishing for Information through malicious redirects. Organizations using vulnerable versions of F-Secure Radar face increased risk of credential compromise, potential data breaches, and unauthorized access to sensitive security monitoring information that the platform is designed to protect.
Organizations should immediately update to F-Secure Radar versions released after February 15, 2018, which contain the necessary patches addressing this vulnerability. Security administrators should implement network monitoring to detect suspicious redirect patterns and consider implementing additional authentication controls such as multi-factor authentication to mitigate potential exploitation. The fix typically involves validating the ReturnUrl parameter against a whitelist of trusted domains or implementing proper URL sanitization techniques before processing the redirect. Additionally, organizations should conduct security assessments of their authentication flows and ensure that all redirect mechanisms properly validate destination URLs to prevent similar vulnerabilities from emerging in other components of their security infrastructure.