CVE-2012-0307 in Messaging Gateway
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in Symantec Messaging Gateway (SMG) before 10.0 allow remote attackers to inject arbitrary web script or HTML via (1) web content or (2) e-mail content.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 12/12/2021
The CVE-2012-0307 vulnerability represents a critical cross-site scripting flaw discovered in Symantec Messaging Gateway versions prior to 10.0, demonstrating a fundamental weakness in web application security controls that could enable attackers to execute malicious code within the context of affected systems. This vulnerability specifically affects the Symantec Messaging Gateway, a comprehensive email security solution designed to protect organizations from spam, malware, and other email-based threats while maintaining secure communication channels. The flaw exists in both web content and email content processing mechanisms, creating multiple attack vectors that could be exploited by remote threat actors without requiring authentication or privileged access to the system.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding mechanisms within the Symantec Messaging Gateway's web interface and email processing components. Attackers can exploit this weakness by crafting malicious payloads that contain embedded script code within web content or email messages, which are then executed when legitimate users interact with the affected system. The vulnerability manifests when the system fails to properly sanitize user-supplied input before rendering it in web pages or email content, allowing malicious scripts to execute in the context of the victim's browser session. This represents a classic case of inadequate security controls in data sanitization and output encoding, aligning with CWE-79 which specifically addresses Cross-Site Scripting vulnerabilities through improper neutralization of input during web page generation.
The operational impact of CVE-2012-0307 extends beyond simple data theft or system compromise, as it creates a persistent threat vector that could enable attackers to establish persistent access to email systems and potentially escalate privileges within the organization's communication infrastructure. An attacker could leverage this vulnerability to perform session hijacking, steal authentication tokens, redirect users to malicious sites, or even deliver additional malware payloads through the compromised email gateway. The vulnerability's remote exploitability means that attackers do not need physical access or network proximity to the system, making it particularly dangerous for organizations that rely on Symantec Messaging Gateway for email security. The attack surface is further expanded by the fact that email content is often trusted by users, making social engineering aspects of the attack more effective and potentially leading to broader organizational compromise.
Organizations affected by this vulnerability should implement immediate mitigations including patching to Symantec Messaging Gateway version 10.0 or later, which addresses the underlying input validation and output encoding deficiencies. Network segmentation and monitoring of email traffic can provide additional layers of defense, while user education regarding suspicious email content and web interactions can help reduce successful exploitation attempts. The vulnerability also highlights the importance of implementing comprehensive security testing procedures including dynamic application security testing and static code analysis to identify similar input validation weaknesses in other web applications. From an ATT&CK framework perspective, this vulnerability maps to techniques involving initial access through web application attacks and privilege escalation through session manipulation, emphasizing the need for layered security approaches that address both network-level and application-level threats. The remediation process should also include comprehensive testing to ensure that the patch does not introduce regressions in legitimate email processing functionality while maintaining the security controls necessary to prevent similar vulnerabilities from emerging in the future.