CVE-2004-1206 in pnTresMailer
Summary
by MITRE
Directory traversal vulnerability in codebrowserpntm.php in pnTresMailer 6.0.3 allows remote attackers to read arbitrary files via a .. (dot dot) in the filetodownload parameter.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 06/02/2025
The directory traversal vulnerability identified in CVE-2004-1206 affects the pnTresMailer 6.0.3 web application, specifically within the codebrowserpntm.php component. This flaw represents a classic path traversal attack vector that enables remote adversaries to access files outside the intended directory structure. The vulnerability manifests when the application fails to properly validate or sanitize user input provided through the filetodownload parameter, allowing malicious actors to manipulate file paths using directory traversal sequences such as .. or %2e%2e. The underlying technical flaw aligns with CWE-22, which categorizes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. This vulnerability type has been consistently documented in cybersecurity literature and represents one of the most fundamental and persistent threats in web application security.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with unrestricted access to the underlying file system of the affected server. Remote attackers can leverage this weakness to retrieve sensitive configuration files, source code, database credentials, and other confidential data stored on the web server. The implications are particularly severe when considering that pnTresMailer is a web-based email management system, potentially exposing email configurations, user data, and system credentials. Attackers may also use this vulnerability to escalate privileges, execute arbitrary code, or establish persistent access to the compromised system. The vulnerability's remote nature means that exploitation does not require local system access, making it particularly dangerous as it can be exploited from anywhere on the internet.
Security practitioners should recognize this vulnerability as part of the broader ATT&CK framework's T1083 (File and Directory Discovery) and T1566 (Phishing) techniques, as attackers often combine directory traversal with social engineering to maximize impact. The vulnerability's exploitation typically involves sending crafted HTTP requests with malicious file paths, such as ../../etc/passwd or ../../../windows/system32/drivers/etc/hosts, depending on the target operating system. Organizations should implement comprehensive input validation and sanitization measures, including the use of allowlists for acceptable file paths, proper file access controls, and regular security audits. Additionally, the principle of least privilege should be enforced, ensuring that web applications operate with minimal required permissions and that sensitive files are stored outside the web root directory. The vulnerability demonstrates the critical importance of proper input validation and the need for robust security measures in web applications, as even simple parameter handling flaws can lead to complete system compromise.