CVE-2011-1688 in Best Practical
Summary
by MITRE
Directory traversal vulnerability in Best Practical Solutions RT 3.2.0 through 3.6.10, 3.8.0 through 3.8.9, and 4.0.0rc through 4.0.0rc7 allows remote attackers to read arbitrary files via a crafted HTTP request.
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Analysis
by VulDB Data Team • 11/05/2021
The vulnerability identified as CVE-2011-1688 represents a critical directory traversal flaw affecting Best Practical Solutions RT (Request Tracker) versions spanning multiple release branches including 3.2.0 through 3.6.10, 3.8.0 through 3.8.9, and 4.0.0rc through 4.0.0rc7. This issue stems from inadequate input validation mechanisms within the application's file handling processes, specifically when processing HTTP requests containing crafted path sequences that manipulate the intended file access operations. The vulnerability operates at the application layer and can be exploited remotely without requiring authentication or prior access to the system.
The technical implementation of this directory traversal vulnerability occurs when the RT application fails to properly sanitize user-supplied input that is used in file system operations. Attackers can manipulate HTTP request parameters to include sequences such as "../" or similar path traversal characters that cause the application to access files outside of its intended directory structure. This flaw maps directly to CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The vulnerability allows attackers to bypass normal access controls and retrieve sensitive files from the server's file system, potentially including configuration files, database credentials, source code, or other confidential information.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with the capability to access arbitrary files on the compromised system. This could lead to complete system compromise if sensitive configuration files containing database passwords or cryptographic keys are accessed, or if the attacker can read source code files to identify additional vulnerabilities. The remote nature of the attack means that exploitation can occur from any network location without requiring physical access or local system privileges, making it particularly dangerous in enterprise environments where RT systems often handle sensitive business data and user information. According to ATT&CK framework, this vulnerability maps to T1083 (File and Directory Discovery) and T1566 (Phishing with Malicious Attachment) as attackers may use the discovered files to craft more sophisticated attacks.
Mitigation strategies for CVE-2011-1688 should prioritize immediate patching of affected RT versions to the latest available releases that contain proper input validation and sanitization mechanisms. Organizations should implement network-level restrictions to limit access to RT systems and consider implementing web application firewalls that can detect and block suspicious path traversal patterns in HTTP requests. Additionally, regular security audits should verify that all file access operations properly validate and sanitize input parameters, and that the principle of least privilege is enforced when configuring file system access permissions. System administrators should also conduct comprehensive vulnerability assessments to identify any other applications or services that might be susceptible to similar directory traversal flaws, as these vulnerabilities often indicate broader security architecture weaknesses that require systematic remediation approaches.