CVE-2020-8503 : Security Advisory and Response

Biscom Secure File Transfer (SFT) versions 5.0.1050 through 5.1.1067 and 6.0.1000 through 6.0.1003 are affected by an Insecure Direct Object Reference (IDOR) vulnerability due to an error in the file-upload feature. This CVE has been fixed in versions 5.1.1068 and 6.0.1004.

Understanding CVE-2020-8503

Biscom Secure File Transfer (SFT) vulnerability

What is CVE-2020-8503?

CVE-2020-8503 is an Insecure Direct Object Reference (IDOR) vulnerability in Biscom Secure File Transfer (SFT) versions 5.0.1050 through 5.1.1067 and 6.0.1000 through 6.0.1003.

The Impact of CVE-2020-8503

This vulnerability allows an authenticated sender to perform unauthorized actions due to the error in the file-upload feature, potentially leading to unauthorized access to sensitive data.

Technical Details of CVE-2020-8503

Details of the vulnerability

Vulnerability Description

The vulnerability in Biscom Secure File Transfer (SFT) versions 5.0.1050 through 5.1.1067 and 6.0.1000 through 6.0.1003 allows an authenticated sender to exploit an Insecure Direct Object Reference (IDOR) due to a flaw in the file-upload functionality.

Affected Systems and Versions

Biscom Secure File Transfer (SFT) versions 5.0.1050 through 5.1.1067
Biscom Secure File Transfer (SFT) versions 6.0.1000 through 6.0.1003

Exploitation Mechanism

The vulnerability can be exploited by an authenticated sender to access and manipulate files that they are not authorized to, potentially leading to unauthorized data access.

Mitigation and Prevention

Protecting against CVE-2020-8503

Immediate Steps to Take

Upgrade Biscom Secure File Transfer (SFT) to versions 5.1.1068 or 6.0.1004 that contain the fix for the vulnerability.
Monitor user activities for any unauthorized access or file manipulation.

Long-Term Security Practices

Regularly update and patch software to ensure the latest security fixes are applied.
Implement access controls and permissions to restrict user actions and prevent unauthorized access.

Patching and Updates

Apply patches and updates provided by Biscom to address the Insecure Direct Object Reference (IDOR) vulnerability in Biscom Secure File Transfer (SFT).