CVE-2005-3506 in Server
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in proxy.asp in Sambar Server 6.3 BETA 2 and possibly earlier versions allows remote attackers to inject arbitrary web script or HTML via the (1) Remote Proxy Server or (2) Proxy Filter IPs field.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 07/05/2019
The vulnerability identified as CVE-2005-3506 represents a critical cross-site scripting flaw within the Sambar Server 6.3 BETA 2 web application server software. This weakness resides in the proxy.asp component which handles proxy server configurations and proxy filter IP address management. The vulnerability specifically affects the Remote Proxy Server and Proxy Filter IPs input fields, making it accessible to remote attackers who can exploit these interfaces to execute malicious code within the context of user sessions.
This XSS vulnerability operates through the injection of malicious scripts into the proxy server configuration fields, allowing attackers to manipulate how the server processes and displays proxy-related information. When users view pages that display the compromised proxy settings, the injected scripts execute in their browsers, potentially leading to session hijacking, credential theft, or redirection to malicious sites. The flaw exists because the application fails to properly sanitize or encode user input before incorporating it into dynamically generated web pages, creating a direct pathway for malicious code execution.
The operational impact of this vulnerability extends beyond simple script injection, as it can be leveraged for more sophisticated attacks within the context of web application security. Attackers can craft payloads that exploit the proxy configuration fields to bypass security controls, escalate privileges, or gain unauthorized access to systems that rely on the Sambar Server for proxy services. The vulnerability particularly affects environments where the proxy server functionality is used for content filtering or network access control, as compromised proxy settings could allow attackers to bypass security policies and gain access to restricted resources.
Security professionals should recognize this vulnerability as a classic example of CWE-79 - Improper Neutralization of Input During Web Page Generation, which is a fundamental weakness in web application security. The attack vector aligns with ATT&CK technique T1566.001 - Phishing: Spearphishing Attachment, as attackers could use the XSS vulnerability to deliver malicious payloads through compromised proxy configurations. Organizations using Sambar Server should implement immediate mitigations including input validation, output encoding, and proper sanitization of all user-supplied data in proxy configuration fields. The vulnerability also highlights the importance of secure coding practices and regular security assessments of web application components, particularly those handling user input in server-side configuration interfaces.
The remediation approach should focus on implementing comprehensive input validation that rejects or sanitizes potentially malicious content before processing proxy configuration data. Additionally, developers should ensure that all dynamic content generated from user inputs undergoes proper HTML encoding to prevent script execution. Organizations should also consider implementing web application firewalls and security monitoring solutions that can detect and block suspicious proxy configuration attempts. Given the age of this vulnerability and the specific version affected, upgrading to a supported version of Sambar Server or migrating to alternative web server solutions represents the most effective long-term mitigation strategy for preventing exploitation of this XSS vulnerability.