CVE-2009-3124 in QuarkMail
Summary
by MITRE
Directory traversal vulnerability in get_message.cgi in QuarkMail allows remote attackers to read arbitrary files via a .. (dot dot) in the tf parameter.
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Analysis
by VulDB Data Team • 08/11/2025
The vulnerability identified as CVE-2009-3124 represents a classic directory traversal flaw within the QuarkMail web application's get_message.cgi component. This security weakness resides in the application's handling of user-supplied input through the tf parameter, which processes file paths without adequate sanitization or validation. The vulnerability enables malicious actors to exploit the application's file system access mechanisms by crafting specially formatted requests containing directory traversal sequences such as .. or %2e%2e. The flaw stems from insufficient input validation that fails to properly sanitize or restrict user-controllable path components, allowing attackers to navigate beyond the intended directory boundaries and access unauthorized files within the server's file system.
The technical implementation of this vulnerability demonstrates a fundamental flaw in input validation and path resolution logic within the QuarkMail application. When the tf parameter is processed by get_message.cgi, the application does not properly validate or sanitize the input before using it to construct file system paths. This allows an attacker to inject directory traversal sequences that manipulate the file system navigation logic, effectively bypassing normal access controls and permissions. The vulnerability is classified as a CWE-22 Directory Traversal attack pattern, which specifically addresses improper input validation that allows access to files and directories outside the intended scope. The attack vector requires only a remote web request with a malicious tf parameter value, making it particularly dangerous as it can be exploited from any location without requiring local access or authentication.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with the ability to access sensitive files that may contain configuration data, user credentials, application source code, or other confidential information. Depending on the system configuration and file permissions, attackers could potentially access database files, system configuration files, or even execute arbitrary code if they can manipulate executable files within the application's directory structure. The vulnerability affects any system running QuarkMail versions that contain the vulnerable get_message.cgi script, and since this was a widespread issue in older web applications, numerous systems were likely exposed to this risk. The attack can be executed through simple web browser requests or automated tools, making it accessible to attackers with minimal technical expertise and potentially leading to significant data breaches or system compromise.
Security mitigations for this vulnerability require immediate implementation of proper input validation and sanitization measures within the QuarkMail application. The most effective approach involves implementing strict input validation that filters out or escapes directory traversal sequences such as .. or %2e%2e from user-supplied parameters before they are processed. Additionally, the application should employ a whitelist approach for file access, where only predefined, safe file paths are allowed for access rather than accepting arbitrary paths from user input. System administrators should also implement proper file system permissions and access controls to limit what files can be accessed even if the vulnerability is exploited. The remediation process should include updating the application to a patched version or implementing proper code changes that prevent path traversal attacks. Organizations should also consider implementing web application firewalls and intrusion detection systems to monitor for suspicious requests containing directory traversal patterns. This vulnerability aligns with ATT&CK technique T1083 (File and Directory Discovery) and T1566 (Phishing) as attackers may use this vulnerability to gather intelligence about the target system or as part of broader attack chains. The remediation efforts should follow security best practices outlined in OWASP Top Ten and NIST guidelines for preventing directory traversal vulnerabilities in web applications.