CVE-2020-5001 in Financial Transaction Manager
Summary
by MITRE • 03/02/2023
IBM Financial Transaction Manager 3.2.0 through 3.2.7 could allow a remote attacker to traverse directories on the system. An attacker could send a specially-crafted URL request containing "dot dot" sequences (/../) to view arbitrary files on the system. IBM X-Force ID: 192953.
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Analysis
by VulDB Data Team • 03/30/2023
The vulnerability identified as CVE-2020-5001 affects IBM Financial Transaction Manager versions 3.2.0 through 3.2.7, representing a critical directory traversal flaw that enables remote attackers to access arbitrary files on the affected system. This issue stems from insufficient input validation within the application's URL parsing mechanism, which fails to properly sanitize user-supplied paths containing directory traversal sequences. The vulnerability specifically manifests when an attacker crafts a malicious URL request incorporating "dot dot" sequences using the forward slash notation followed by two periods and another forward slash. This flaw allows unauthorized access to files outside the intended directory structure, potentially exposing sensitive financial data, configuration files, or system resources that should remain protected from external access.
The technical implementation of this vulnerability aligns with common directory traversal attack patterns that have been documented in numerous security frameworks and standards. According to CWE classification, this represents a variant of CWE-22 - Improper Limitation of a Pathname to a Restricted Directory, which is a fundamental weakness in input validation that allows attackers to access files or directories they should not normally have access to. The vulnerability operates at the application layer and can be exploited through HTTP requests, making it particularly dangerous in web-based financial transaction environments where sensitive data processing occurs. The attack vector requires no authentication for exploitation, as the vulnerability exists within the application's handling of untrusted input from network requests, making it a significant risk for systems that process financial transactions and handle sensitive customer data.
The operational impact of this vulnerability extends beyond simple information disclosure, as financial transaction managers typically process highly sensitive data including customer account information, transaction records, and proprietary business data. An attacker exploiting this vulnerability could potentially access database connection strings, encryption keys, system configuration files, or other sensitive components that would provide additional attack surface for further compromise. The vulnerability creates a persistent risk for organizations using IBM Financial Transaction Manager, as it allows attackers to bypass normal access controls and directly access system resources that should be protected by proper directory permissions and access controls. This type of vulnerability is particularly concerning in financial environments where regulatory compliance requirements mandate strict data protection measures and where unauthorized access to transaction data could result in significant financial and legal consequences.
Mitigation strategies for CVE-2020-5001 should focus on immediate patch application from IBM, as the vendor has likely released security updates addressing this specific directory traversal flaw. Organizations should implement network-level restrictions to limit access to the affected application, particularly by blocking direct external access to web interfaces that handle user input. Input validation controls should be strengthened at the application level to properly sanitize all URL parameters and reject any requests containing directory traversal sequences. The implementation of web application firewalls can provide additional protection by detecting and blocking malicious URL patterns before they reach the vulnerable application components. Security monitoring should be enhanced to detect unusual access patterns or attempts to access system files, as outlined in the ATT&CK framework's methodology for detecting command and control activities and privilege escalation techniques. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in other applications within the financial transaction processing environment, as this type of directory traversal vulnerability commonly exists in legacy systems and can provide attackers with a foothold for more extensive compromises.