CVE-2013-5013 in Web Gateway
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in the management console on the Symantec Web Gateway (SWG) appliance before 5.2 allow remote attackers to inject arbitrary web script or HTML via (1) vectors involving PHP scripts and (2) unspecified other vectors.
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Analysis
by VulDB Data Team • 06/09/2021
The CVE-2013-5013 vulnerability represents a critical security flaw in Symantec Web Gateway appliance management console, specifically affecting versions prior to 5.2. This vulnerability falls under the category of cross-site scripting attacks, which are classified under CWE-79 in the Common Weakness Enumeration catalog. The flaw exists within the web interface of the appliance, making it a prime target for remote attackers who can exploit the vulnerability without requiring any local access or authentication. The Symantec Web Gateway appliance serves as a web proxy and content filtering solution, making it a critical component in enterprise network security infrastructure. The management console provides administrators with access to configuration settings, logging, and monitoring capabilities, which makes it a high-value target for attackers seeking to gain unauthorized access to network security controls.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding within the PHP-based management interface. Attackers can exploit the flaw by injecting malicious scripts or HTML code through various input vectors, including PHP scripts and other unspecified methods. The vulnerability specifically affects the appliance's handling of user-supplied data in the management console, where the system fails to properly sanitize or encode input before rendering it in the web interface. This lack of proper sanitization creates opportunities for attackers to execute malicious code in the context of the victim's browser, potentially leading to session hijacking, credential theft, or unauthorized administrative access. The PHP script vectors suggest that the vulnerability may be related to improper handling of parameters passed to PHP functions or direct inclusion of user input in dynamic PHP execution contexts.
The operational impact of CVE-2013-5013 extends beyond simple script injection, as it can enable attackers to completely compromise the management console of the Symantec Web Gateway appliance. This represents a significant threat to enterprise network security, as successful exploitation could allow attackers to modify firewall rules, disable security features, redirect traffic, or gain persistent access to the appliance. The vulnerability's remote nature means that attackers can exploit it from outside the network perimeter, making it particularly dangerous for organizations that rely on the appliance for web filtering and security enforcement. The attack surface is further expanded because the management console is often accessible over the network, and the appliance may be configured with default credentials or weak authentication mechanisms, making it easier for attackers to gain initial access. According to ATT&CK framework, this vulnerability aligns with techniques involving web application attacks and credential access, potentially enabling lateral movement within the network infrastructure.
Mitigation strategies for CVE-2013-5013 should prioritize immediate patching of affected Symantec Web Gateway appliances to version 5.2 or later, as this resolves the underlying input validation issues. Organizations should also implement network segmentation to limit access to the management console, ensuring that only authorized administrators can reach the appliance. Additional protective measures include implementing web application firewalls to monitor and filter suspicious traffic, enforcing strong authentication mechanisms including multi-factor authentication, and conducting regular security audits of the appliance configuration. The vulnerability demonstrates the importance of proper input validation and output encoding practices, which align with security best practices outlined in the OWASP Top Ten and other industry standards. Organizations should also consider implementing monitoring solutions to detect potential exploitation attempts and establish incident response procedures for handling security breaches involving critical infrastructure components like web gateways and proxy servers.