CVE-2016-10710 in Secure File Transfer
Summary
by MITRE
Biscom Secure File Transfer (SFT) 5.0.1000 through 5.0.1048 does not validate the dataFieldId value, and uses sequential numbers, which allows remote authenticated users to overwrite or read files via crafted requests. Version 5.0.1050 contains the fix.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 12/27/2019
The vulnerability identified as CVE-2016-10710 affects Biscom Secure File Transfer version 5.0.1000 through 5.0.1048, representing a critical access control flaw that undermines the security of file operations within the system. This issue stems from inadequate validation of the dataFieldId parameter, which is used to identify and manage file data fields during transfer operations. The vulnerability creates a scenario where authenticated attackers can exploit the predictable sequential numbering scheme to manipulate file access controls, potentially leading to unauthorized data exposure or modification.
The technical flaw manifests through the absence of proper input validation for the dataFieldId value, which should be strictly validated to prevent arbitrary access to file resources. The system's reliance on sequential numeric identifiers without proper authorization checks creates an exploitable condition where attackers can construct malicious requests that target specific data field identifiers. This weakness enables what is classified as a privilege escalation and data integrity violation, as described in CWE-284 Access Control Issues. The predictable nature of the sequential numbering makes it particularly dangerous, as attackers can systematically enumerate valid dataFieldId values to access files they should not be authorized to read or modify.
Operational impact of this vulnerability extends beyond simple data exposure, as it compromises the fundamental security assumptions of the file transfer system. Remote authenticated users who can access the system can leverage this flaw to overwrite existing files or read confidential data from other users' accounts. This represents a significant breach of confidentiality and integrity principles, potentially affecting sensitive business data, personal information, or proprietary files that organizations rely on for secure file exchange. The vulnerability essentially allows for unauthorized file manipulation across the entire system, as the lack of validation means that any authenticated user can potentially access the complete data field namespace.
The remediation for this vulnerability requires immediate upgrade to version 5.0.1050, which implements proper validation of the dataFieldId parameter and addresses the sequential number exploitation issue. Organizations should also consider implementing additional monitoring and access controls to detect anomalous file access patterns that might indicate exploitation attempts. From a cybersecurity framework perspective, this vulnerability aligns with ATT&CK technique T1078 Valid Accounts, as it exploits legitimate authenticated user access to perform unauthorized operations. The fix addresses the underlying access control weakness by implementing proper input validation and authorization checks, preventing the sequential enumeration attack vector that was previously possible.
Security practitioners should also consider implementing network segmentation and access controls to limit the blast radius of potential exploitation, as well as establishing logging and alerting mechanisms for unusual file access patterns. The vulnerability demonstrates the importance of proper input validation and authorization checks in web applications, particularly those handling sensitive data transfers. Organizations using Biscom SFT should conduct thorough security assessments to ensure no other similar validation issues exist within their deployment and should review their access control policies to prevent similar vulnerabilities from emerging in other components of their security infrastructure.