CVE-2004-2113 in BremsServer
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in BremsServer 1.2.4 allows remote attackers to inject arbitrary web script or HTML via the URL.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 01/20/2025
The vulnerability identified as CVE-2004-2113 represents a classic cross-site scripting flaw within the BremsServer 1.2.4 web application framework. This issue resides in the server's handling of URL parameters, where input validation mechanisms fail to properly sanitize user-supplied data before incorporating it into web responses. The vulnerability classifies under CWE-79 which specifically addresses improper neutralization of input during web page generation, making it a fundamental web application security weakness that has persisted across numerous systems throughout the years.
The technical exploitation of this vulnerability occurs when remote attackers craft malicious URLs containing script code or HTML content that gets executed within the context of other users' browsers. The flaw manifests because the BremsServer application does not adequately filter or escape special characters in URL parameters before rendering them in web pages. When a victim visits a maliciously crafted URL, the embedded script code executes in their browser session, potentially leading to session hijacking, credential theft, or defacement of web content. This type of attack leverages the trust relationship between the web application and its users, allowing malicious code to run with the privileges of the victim's browser session.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform various malicious activities within the victim's browser context. Attackers can steal session cookies, redirect users to phishing sites, modify web page content, or even perform actions on behalf of authenticated users. The vulnerability affects the confidentiality, integrity, and availability of web applications by creating attack vectors that can compromise user data and system resources. Given that this vulnerability was present in a server framework, it likely affected multiple applications built on or using BremsServer, amplifying the potential attack surface and impact scope.
Security mitigations for CVE-2004-2113 should focus on implementing robust input validation and output encoding mechanisms. Organizations should ensure that all user-supplied input, particularly URL parameters, is properly sanitized before being processed or displayed in web responses. This includes implementing proper HTML escaping, using parameterized queries, and employing web application firewalls that can detect and block malicious script injection attempts. The remediation process should involve updating to patched versions of BremsServer or implementing defensive coding practices that prevent the execution of untrusted input as executable code. This vulnerability aligns with ATT&CK technique T1059.007 for scripting and T1566 for credential access, demonstrating how XSS flaws can serve as initial access vectors for more sophisticated attacks.