CVE-2016-9983 in Sterling B2B Integrator Standard Edition
Summary
by MITRE
IBM Sterling B2B Integrator Standard Edition 5.2 could allow an authenticated user with special privileges to view files that they should not have access to. IBM X-Force ID: 120275.
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Analysis
by VulDB Data Team • 12/29/2020
The vulnerability identified as CVE-2016-9983 affects IBM Sterling B2B Integrator Standard Edition version 5.2, representing a critical access control flaw that undermines the system's security model. This issue stems from insufficient authorization checks within the application's file access mechanisms, allowing authenticated users with specific privileges to bypass normal security boundaries and access restricted files. The vulnerability specifically targets the file system access controls that should normally prevent unauthorized data exposure, creating a potential data leakage scenario that could compromise sensitive business information.
The technical implementation of this flaw involves a weakness in the privilege escalation mechanism where certain authenticated users can manipulate file access requests to retrieve files outside their designated access scope. This typically occurs through improper validation of user permissions during file retrieval operations, where the system fails to adequately verify whether the requesting user has legitimate access rights to the targeted resources. The vulnerability falls under the category of inadequate access control as classified by CWE-284, which specifically addresses improper access control mechanisms that allow unauthorized users to access protected resources.
The operational impact of this vulnerability extends beyond simple data exposure, as it creates potential pathways for lateral movement within the organization's network infrastructure. An attacker with access to the system could leverage this flaw to obtain sensitive business documents, configuration files, or other restricted data that might contain intellectual property, customer information, or system credentials. The implications are particularly severe given that the vulnerability requires only authenticated access with special privileges, suggesting that the attacker might already have legitimate access to the system through compromised credentials or legitimate administrative accounts. This scenario aligns with ATT&CK technique T1078 which covers valid accounts as a means of gaining access to systems.
Organizations utilizing IBM Sterling B2B Integrator Standard Edition 5.2 should implement immediate mitigations including applying the vendor-provided security patches and updates as issued by IBM. Network segmentation and monitoring should be enhanced to detect unusual file access patterns that might indicate exploitation attempts. Additionally, privileged account monitoring should be strengthened to identify any unauthorized access to restricted files. The remediation process should involve comprehensive access control reviews to ensure that the principle of least privilege is properly enforced throughout the system. Security teams should also implement file integrity monitoring solutions to detect any unauthorized access or modification of sensitive files that could result from exploitation of this vulnerability.