CVE-2008-3727 in MailScan
Summary
by MITRE
Directory traversal vulnerability in Web Based Administration in MicroWorld Technologies MailScan 5.6.a espatch 1 allows remote attackers to read arbitrary files via a .. (dot dot) in the URI.
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Analysis
by VulDB Data Team • 11/03/2024
The vulnerability identified as CVE-2008-3727 represents a critical directory traversal flaw within the web-based administration interface of MicroWorld Technologies MailScan 5.6.a espatch 1. This security weakness stems from inadequate input validation mechanisms that fail to properly sanitize user-supplied URI parameters, specifically those containing dot-dot-sequence components. The flaw exists in the application's handling of file path references within the web administration module, creating an exploitable condition that allows malicious actors to navigate beyond the intended directory structure and access arbitrary files on the underlying file system.
The technical implementation of this vulnerability aligns with CWE-22, which categorizes directory traversal attacks as improper limitation of a pathname to a restricted directory. Attackers can exploit this weakness by crafting malicious URIs that contain double dot sequences such as "../" or "..\..\" in their requests. When the vulnerable MailScan application processes these malformed paths, it fails to properly validate or sanitize the input before using it in file system operations. This allows an attacker to traverse up the directory hierarchy and access files that should remain restricted, potentially including configuration files, credential stores, or other sensitive system data.
The operational impact of this vulnerability is severe and multifaceted. Remote attackers can leverage this weakness to gain unauthorized access to critical system information, potentially including administrative credentials, email server configurations, and other sensitive data that resides within the application's file system. The vulnerability's remote exploitability means that attackers do not require local system access or authentication to the MailScan administration interface, significantly expanding the attack surface. This flaw could enable attackers to perform privilege escalation, data exfiltration, and potentially establish persistent access to the compromised system.
From a threat modeling perspective, this vulnerability maps to several ATT&CK techniques including T1059 for command and scripting interpreter usage, T1566 for credential access through various methods, and T1083 for file and directory discovery. The attack chain typically involves reconnaissance to identify the vulnerable MailScan installation, crafting of malicious URI requests containing directory traversal sequences, and subsequent exploitation to access restricted files. Organizations running this version of MailScan face significant risk of unauthorized data access and potential system compromise, particularly in environments where email security is critical and sensitive communications are processed.
Mitigation strategies for this vulnerability should include immediate application of the vendor-provided security patch or upgrade to a newer version of MailScan that addresses this directory traversal flaw. Network segmentation and access controls should be implemented to limit exposure of the vulnerable web administration interface to trusted networks only. Input validation mechanisms should be strengthened to properly sanitize all URI parameters, particularly those containing path-related components. Additionally, monitoring and logging of administrative access attempts should be enhanced to detect potential exploitation attempts. Organizations should also conduct regular vulnerability assessments to identify similar weaknesses in other applications and ensure proper patch management processes are in place to address such critical security flaws promptly.