CVE-2015-5665 in EC-CUBE
Summary
by MITRE
Cross-site request forgery (CSRF) vulnerability in LOCKON EC-CUBE 2.11.0 through 2.13.3 allows remote attackers to hijack the authentication of arbitrary users for requests that write to PHP scripts, related to the doValidToken function.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 02/19/2018
The CVE-2015-5665 vulnerability represents a critical cross-site request forgery flaw discovered in the LOCKON EC-CUBE e-commerce platform version 2.11.0 through 2.13.3. This vulnerability resides in the doValidToken function which is responsible for validating CSRF tokens during form submissions. The flaw allows remote attackers to manipulate authentication mechanisms by crafting malicious requests that appear to originate from legitimate users. The vulnerability specifically affects PHP scripts that handle write operations, making it particularly dangerous as it can enable unauthorized modifications to the application's data and user accounts.
The technical implementation of this CSRF vulnerability stems from inadequate token validation mechanisms within the doValidToken function. When users submit forms containing sensitive data or perform administrative actions, the system should verify that the request originates from an authenticated user session. However, the flawed implementation fails to properly validate these tokens, allowing attackers to forge requests that bypass authentication checks. This weakness creates a scenario where an attacker can trick authenticated users into executing unintended actions without their knowledge or consent. The vulnerability is particularly concerning because it operates at the session validation layer, directly compromising the integrity of user authentication processes.
The operational impact of this vulnerability extends beyond simple data theft or modification. Attackers can leverage this CSRF flaw to perform unauthorized administrative actions, modify user accounts, manipulate product catalogs, and potentially gain full control over the e-commerce platform. The write operation capabilities associated with this vulnerability mean that attackers can not only read sensitive data but also alter it, delete records, and create malicious entries within the system. This makes the vulnerability particularly dangerous for online businesses that rely on EC-CUBE for their commerce operations, as it could result in financial losses, data breaches, and compromise of customer information.
Security professionals should note that this vulnerability aligns with CWE-352, which specifically addresses Cross-Site Request Forgery weaknesses in software applications. The flaw demonstrates a classic case of insufficient session validation where the application fails to properly verify the authenticity of user requests. From an ATT&CK framework perspective, this vulnerability maps to technique T1566, specifically the "Phishing" sub-technique, as attackers can craft convincing phishing emails or malicious websites that exploit this CSRF weakness. Additionally, the vulnerability relates to T1078 which covers valid accounts, as successful exploitation could lead to unauthorized access to legitimate user accounts.
Mitigation strategies for CVE-2015-5665 should focus on implementing proper CSRF token validation mechanisms throughout the application. Organizations must ensure that all write operations require properly validated tokens that are tied to the user's current session. The recommended approach involves strengthening the doValidToken function to properly validate tokens against user sessions and implementing additional security layers such as SameSite cookies, origin checks, and proper request verification. System administrators should also consider implementing rate limiting, monitoring for suspicious activities, and ensuring that all EC-CUBE installations are updated to versions that address this specific vulnerability. Regular security audits and penetration testing should be conducted to identify similar weaknesses in other application components, as CSRF vulnerabilities often occur in patterns that can affect multiple areas of an application's security architecture.