CVE-2017-11586 in FineCMS
Summary
by MITRE
dayrui FineCms 5.0.9 has URL Redirector Abuse via the url parameter in a sync action, related to controllers/Weixin.php.
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Analysis
by VulDB Data Team • 10/31/2019
The vulnerability identified as CVE-2017-11586 affects dayrui FineCms version 5.0.9 and represents a URL redirector abuse flaw that can be exploited through the url parameter within the sync action of the Weixin.php controller. This issue falls under the category of insecure direct object reference vulnerabilities and can be classified as CWE-601. The vulnerability specifically manifests when the application processes user-supplied input through the url parameter without proper validation or sanitization, allowing attackers to manipulate the redirect behavior of the application.
The technical implementation of this vulnerability occurs within the Weixin.php controller where the sync action processes incoming requests and utilizes the url parameter to determine redirect destinations. When an attacker crafts a malicious request containing a crafted url parameter value, the application fails to validate whether the destination URL is within acceptable domains or if it points to malicious external resources. This allows for open redirect scenarios where users may be unknowingly redirected to phishing sites or malicious domains that appear to originate from the legitimate application.
From an operational impact perspective, this vulnerability can enable several attack vectors including phishing attacks, credential theft, and social engineering campaigns. Attackers can craft deceptive URLs that appear to come from the legitimate FineCms application but redirect users to malicious sites designed to capture login credentials or personal information. The vulnerability is particularly dangerous because it leverages the Weixin.php controller which is typically used for wechat integration, making it more likely to be accessed by users who trust the application's legitimate communication channels. This creates a high-risk scenario where users may not suspect that a redirect is occurring and may inadvertently provide sensitive information to attackers.
The security implications extend beyond simple redirection as this vulnerability can be chained with other attacks to create more sophisticated exploitation scenarios. According to ATT&CK framework, this vulnerability aligns with T1566.001 (Phishing: Spearphishing Attachment) and T1071.004 (Application Layer Protocol: DNS) where attackers can use the redirect functionality to mask malicious URLs and make them appear legitimate. The vulnerability also represents a failure in input validation and access control mechanisms, making it a prime target for attackers seeking to establish persistent access or conduct larger-scale campaigns.
Mitigation strategies should include immediate implementation of proper input validation and sanitization for all user-supplied parameters, particularly those used in redirect operations. The application should maintain a strict allowlist of approved redirect destinations and reject any requests that attempt to redirect to external domains. Additionally, developers should implement proper access controls and authentication checks to prevent unauthorized manipulation of redirect parameters. Security patches should be applied immediately to update the FineCms application to versions that address this vulnerability, and organizations should conduct thorough security assessments of their web applications to identify similar redirect vulnerabilities in other components. Network monitoring should also be enhanced to detect suspicious redirect patterns and potential exploitation attempts.