CVE-2018-1389 in API Connect
Summary
by MITRE
IBM API Connect 5.0.0.0 through 5.0.8.2 is impacted by generated LoopBack APIs for a Model using the BelongsTo/HasMany relationship allowing unauthorized modification of information. IBM X-Force ID: 138213.
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Analysis
by VulDB Data Team • 03/08/2023
The vulnerability identified as CVE-2018-1389 affects IBM API Connect versions 5.0.0.0 through 5.0.8.2, representing a critical authorization flaw that enables unauthorized data modification through improperly configured LoopBack API generation processes. This issue stems from the improper handling of model relationships within the API management platform, specifically when generating APIs for models utilizing BelongsTo and HasMany relationship patterns. The vulnerability manifests when the system fails to adequately validate or enforce access controls during API generation, creating opportunities for malicious actors to manipulate data through crafted API requests.
The technical root cause of this vulnerability lies in the insufficient input validation and access control mechanisms within the LoopBack framework integration used by IBM API Connect. When generating APIs for models with BelongsTo/HasMany relationships, the system creates endpoints that do not properly enforce authorization boundaries, allowing attackers to bypass normal access controls and modify data that should be restricted. This flaw operates at the application level and specifically targets the API generation and management components rather than underlying infrastructure. The vulnerability is classified under CWE-285 (Improper Authorization) and aligns with ATT&CK technique T1078 (Valid Accounts) as it leverages legitimate API access patterns to perform unauthorized modifications.
The operational impact of this vulnerability is significant as it allows attackers to modify sensitive data within the API management environment without proper authorization. An attacker could potentially manipulate related data records through the generated APIs, affecting data integrity and potentially compromising the entire API ecosystem managed by IBM API Connect. The vulnerability affects the consistency of data relationships between models, as BelongsTo and HasMany relationships are fundamental to maintaining referential integrity in database designs. This could lead to cascading data corruption issues and undermine the reliability of applications built on top of the affected API platform.
Organizations using affected IBM API Connect versions should immediately implement mitigations including applying the latest security patches provided by IBM, reviewing and strengthening API access controls, and implementing additional monitoring for unusual API activity patterns. Network segmentation and firewall rules should be configured to limit access to API management interfaces, while comprehensive logging should be enabled to detect unauthorized modifications. The vulnerability also highlights the importance of proper API security testing, particularly for generated APIs, as outlined in OWASP API Security Top 10. Organizations should conduct thorough security assessments of their API generation processes and implement proper authorization testing for all generated endpoints, especially those involving relational data models. Additionally, implementing principle of least privilege access controls and regular security audits of API configurations can help prevent exploitation of this vulnerability.