CVE-2020-5337 in Archer
Summary
by MITRE
RSA Archer, versions prior to 6.7 P1 (6.7.0.1), contain a URL redirection vulnerability. A remote unauthenticated attacker could potentially exploit this vulnerability to redirect application users to arbitrary web URLs by tricking the victim users to click on maliciously crafted links. The vulnerability could be used to conduct phishing attacks that cause users to unknowingly visit malicious sites.
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Analysis
by VulDB Data Team • 10/15/2020
The RSA Archer platform, a comprehensive risk management and governance solution, contains a critical URL redirection vulnerability that affects versions prior to 6.7 P1. This vulnerability represents a significant security flaw that allows remote attackers to manipulate the application's navigation behavior without authentication requirements. The flaw exists within the application's handling of URL parameters, specifically in how the system processes and redirects users to external destinations. Attackers can craft malicious links that, when clicked by unsuspecting users, will redirect them to attacker-controlled websites while maintaining the appearance of legitimate application navigation.
This vulnerability operates through a classic open redirect flaw pattern that aligns with CWE-601, which specifically addresses URL redirection vulnerabilities where applications redirect users to external domains without proper validation. The technical implementation of this flaw allows attackers to insert arbitrary URLs into the application's redirect parameters, bypassing normal access controls and authentication mechanisms. The vulnerability is particularly dangerous because it requires no authentication from the attacker, making it accessible to anyone who can observe or intercept application traffic. The affected application components likely include the session management subsystem and the URL validation logic that should normally verify destination URLs against a whitelist or trusted domain list.
The operational impact of this vulnerability extends beyond simple phishing attacks, creating a pathway for more sophisticated social engineering campaigns. Users who are redirected to malicious sites may unknowingly enter credentials, download malware, or provide sensitive information that the attacker can harvest. The attack vector relies heavily on user interaction through email links, instant messaging, or other communication channels where users are tricked into clicking seemingly legitimate application links. This vulnerability undermines the trust model of the application and creates potential for credential theft, data exfiltration, and further compromise of the organization's security posture. The impact is amplified in enterprise environments where RSA Archer is used for critical risk management functions, potentially allowing attackers to gain insights into organizational vulnerabilities or manipulate risk assessment data.
Organizations should implement immediate mitigations including applying the vendor-provided patch for version 6.7 P1 and implementing strict URL validation controls within the application. Network-level controls such as web application firewalls can help detect and block malicious redirect attempts, while user education programs should emphasize the importance of verifying URLs before clicking. The remediation process should include thorough testing of the patched version to ensure that legitimate redirection functionality remains intact while eliminating the vulnerability. Security teams should also monitor network traffic for suspicious redirect patterns and implement logging mechanisms to track redirection events for forensic analysis. Organizations using older versions should consider immediate migration to supported releases and conduct comprehensive security assessments to identify potential exploitation attempts.