CVE-2008-2162 in E-mail Security
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in SonicWall Email Security 6.1.1 allows remote attackers to inject arbitrary web script or HTML via the Host header in a request to a non-existent web page, which is not properly sanitized in an error page.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 02/03/2025
The vulnerability identified as CVE-2008-2162 represents a critical cross-site scripting flaw within SonicWall Email Security version 6.1.1, classified under CWE-79 Improper Neutralization of Input During Web Page Generation. This vulnerability specifically targets the handling of HTTP Host headers during error conditions when users attempt to access non-existent web pages within the email security appliance's web interface. The flaw arises from insufficient input sanitization mechanisms that fail to properly escape or validate user-supplied data before incorporating it into dynamically generated error pages. Attackers can exploit this weakness by crafting malicious Host headers containing script payloads that will execute in the context of other users who view the resulting error page, potentially leading to session hijacking, credential theft, or redirection to malicious sites.
The operational impact of this vulnerability extends beyond simple script injection, as it provides attackers with a vector for persistent malicious activity within the email security environment. When users navigate to non-existent paths on the SonicWall appliance, the system generates error pages that inadvertently include the malformed Host header content without proper sanitization. This creates an environment where attackers can establish persistent XSS payloads that execute in the victim's browser context, potentially compromising the security of email communications and administrative sessions. The vulnerability is particularly concerning because it operates at the HTTP protocol level, making it difficult to detect through traditional network monitoring and requiring careful inspection of HTTP headers and error page generation logic.
From a threat modeling perspective, this vulnerability aligns with ATT&CK technique T1566.001 Phishing, as attackers can leverage the XSS capability to craft convincing phishing pages that appear legitimate within the email security interface. The attack chain typically involves sending crafted emails containing links that, when clicked, direct users to the vulnerable SonicWall appliance with malicious Host headers. The error page generation process becomes the attack surface where the malicious script executes, potentially harvesting cookies, session tokens, or redirecting users to attacker-controlled domains. Security professionals should note that this vulnerability affects the web administration interface of the appliance, making it a potential entry point for attackers seeking to compromise the entire email security infrastructure.
Mitigation strategies for CVE-2008-2162 should include immediate implementation of input validation and sanitization measures for all HTTP headers, particularly the Host header, during error condition processing. Organizations should deploy web application firewalls that can detect and block malicious Host header patterns, implement proper header validation at the network perimeter, and ensure that all error pages are generated with strict output encoding. The most effective long-term solution involves upgrading to SonicWall Email Security versions that have addressed this vulnerability through proper input sanitization and secure error page generation. Additionally, network segmentation and access control measures should be implemented to limit exposure of the vulnerable appliance to untrusted networks, while regular security assessments should verify that no other similar vulnerabilities exist within the appliance's web interface components. The vulnerability demonstrates the critical importance of input validation in web applications and serves as a reminder of the potential consequences when error handling logic fails to properly sanitize user-supplied data.