CVE-2018-11442 in EasyService Billing
Summary
by MITRE
A CSRF issue was discovered in EasyService Billing 1.0, which was triggered via a quotation-new3-new2.php?add=true&id= URI, as demonstrated by adding a new quotation.
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Analysis
by VulDB Data Team • 05/02/2025
The vulnerability identified as CVE-2018-11442 represents a critical cross-site request forgery flaw in EasyService Billing version 1.0 that enables unauthorized users to perform administrative actions without proper authentication. This weakness exists within the web application's handling of requests to the quotation-new3-new2.php endpoint, specifically when the add=true&id= parameter is utilized, allowing attackers to manipulate the system through crafted malicious requests.
The technical implementation of this CSRF vulnerability stems from the absence of proper request validation mechanisms and anti-CSRF tokens within the targeted web page. When a user visits a malicious website or clicks on a compromised link, the application fails to verify that the request originates from an authenticated user with proper authorization. The vulnerability is particularly concerning because it allows attackers to add new quotations to the system without requiring valid credentials, effectively bypassing the application's access control mechanisms. This flaw operates at the application layer and can be exploited through various attack vectors including social engineering campaigns, phishing emails, or compromised websites that embed malicious code.
The operational impact of this vulnerability extends beyond simple unauthorized data manipulation, as it provides attackers with the capability to inject malicious quotations into the billing system, potentially leading to financial fraud, data integrity compromise, and disruption of legitimate business operations. The affected system could be used to create false billing records, manipulate existing quotations, or even establish persistent attack vectors within the organization's financial processes. This vulnerability directly violates security principles outlined in the OWASP Top Ten 2017, specifically addressing the lack of proper access controls and insufficient logging mechanisms that should prevent unauthorized administrative actions. Organizations utilizing EasyService Billing 1.0 face significant risk of financial loss and operational disruption when this vulnerability remains unpatched.
Mitigation strategies for CVE-2018-11442 should include immediate implementation of anti-CSRF tokens for all state-changing requests within the application, proper validation of request origins, and enforcement of strict session management protocols. The fix should involve generating unique tokens for each user session and validating these tokens against every request that modifies application state. Organizations should also implement Content Security Policy headers to prevent unauthorized script execution and establish proper input validation mechanisms to prevent parameter manipulation. This vulnerability aligns with CWE-352, which specifically addresses Cross-Site Request Forgery issues, and follows the ATT&CK framework's technique T1078 for Valid Accounts and T1566 for Phishing. Regular security audits and penetration testing should be conducted to identify similar vulnerabilities in other web applications, while user education regarding suspicious links and website behavior remains crucial in preventing exploitation of such CSRF flaws.