CVE-2017-15380 in E-Sic
Summary
by MITRE
XSS exists in the E-Sic 1.0 /cadastro/index.php URI (aka the requester's registration area) via the nome parameter.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 11/30/2019
The vulnerability identified as CVE-2017-15380 represents a cross-site scripting flaw within the E-Sic 1.0 web application's registration area. This security weakness resides in the /cadastro/index.php endpoint where user input is not properly sanitized before being rendered back to the browser. The specific parameter affected is named 'nome' which likely corresponds to a name field in the registration form. This type of vulnerability allows attackers to inject malicious scripts that execute in the context of other users' browsers, creating a significant security risk for the application and its users.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding practices within the web application's backend processing. When users submit data through the registration form using the nome parameter, the application fails to properly escape or sanitize special characters that could be interpreted as HTML or JavaScript code. This allows an attacker to craft malicious input containing script tags or other executable code that gets stored and subsequently executed when other users view the affected page. The vulnerability operates under CWE-79 which categorizes cross-site scripting as a critical weakness in web applications where untrusted data is improperly handled during web page generation.
The operational impact of this vulnerability extends beyond simple data theft or session hijacking. Attackers could exploit this flaw to perform actions on behalf of authenticated users, potentially gaining access to sensitive information or modifying user data. The registration area typically contains personal information and may be used for administrative functions, making it a valuable target for attackers seeking to compromise the system. This vulnerability could enable threat actors to escalate privileges, access restricted areas, or establish persistent access through session manipulation techniques that align with ATT&CK tactics such as credential access and privilege escalation.
Mitigation strategies for CVE-2017-15380 should focus on implementing proper input validation and output encoding mechanisms throughout the application. Developers must ensure that all user-supplied data is sanitized before being processed or stored, with special attention to HTML and JavaScript characters that could be exploited. The application should employ context-appropriate output encoding when rendering user data back to the browser, particularly in dynamic content areas. Additionally, implementing a robust content security policy can provide an additional layer of protection against script execution. Regular security testing including dynamic application security testing and manual code reviews should be conducted to identify similar vulnerabilities in other application components. The fix should involve updating the E-Sic 1.0 application to properly escape user input and validate all parameters received through the nome field, ensuring that any potentially malicious content is neutralized before being processed by the web server.