CVE-2020-4907

Vulnerability

CVE-2020-4907 is an information disclosure vulnerability in IBM Financial Transaction Manager for SWIFT Services for Multiplatforms version 3.2.4 [1]. The application returns detailed technical error messages in the browser that can contain sensitive information, such as internal paths, configuration details, or stack traces [1]. No authentication is required to trigger the disclosure, as the error messages are generated in response to typical user interactions or malformed requests.

Exploitation

An attacker with network access to the affected service can send crafted requests that cause the application to return detailed error messages [1]. No prior authentication or special privileges are needed. The vulnerability is exploitable remotely over HTTP and does not require user interaction [1]. The attacker simply observes the response content for any leaked internal information.

Impact

Successful exploitation results in the disclosure of sensitive system information, which could include paths, version details, or other configuration data [1]. The CVSS 3.0 base score is 5.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N), indicating a low confidentiality impact but no direct impact on integrity or availability [1]. The leaked information may assist an attacker in crafting more targeted attacks against the system [1].

Mitigation

IBM has released advisory details for this vulnerability [1]. The fixed version is not explicitly stated in the reference, but users should consult the security bulletin and upgrade IBM Financial Transaction Manager for SWIFT Services to the latest patched release as recommended by IBM [1]. If no immediate patch is available, organizations should review and restrict access to error pages and implement generic error handling to avoid leaking technical details.