CVE-2022-23623 in frourio
Summary
by MITRE • 02/08/2022
Frourio is a full stack framework, for TypeScript. Frourio users who uses frourio version prior to v0.26.0 and integration with class-validator through `validators/` folder are subject to a input validation vulnerability. Validators do not work properly for request bodies and queries in specific situations and some input is not validated at all. Users are advised to update frourio to v0.26.0 or later and to install `class-transformer` and `reflect-metadata`.
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Analysis
by VulDB Data Team • 02/11/2022
The vulnerability identified as CVE-2022-23623 affects the Frourio full stack framework for TypeScript, specifically impacting users who integrate class-validator through the validators/ folder structure. This issue represents a critical input validation weakness that undermines the security posture of applications built on this framework. The vulnerability stems from improper implementation of validation mechanisms within the framework's request processing pipeline, creating potential attack vectors for malicious input manipulation.
The technical flaw manifests in the validation logic where request bodies and query parameters fail to undergo proper validation under certain circumstances. This occurs due to a breakdown in the validation pipeline that prevents class-validator from properly processing input data when it is structured through the designated validators/ directory. The vulnerability is particularly concerning as it allows some input to bypass validation entirely, creating a false sense of security for developers who rely on the framework's validation capabilities. This issue is classified under CWE-20 as "Improper Input Validation" and aligns with ATT&CK technique T1210 "Exploitation of Remote Services" through the manipulation of unvalidated input.
The operational impact of this vulnerability extends beyond simple data integrity concerns, potentially enabling attackers to exploit application logic flaws through crafted input. When request bodies and queries are not properly validated, malicious actors can inject malformed data that may lead to data corruption, unauthorized access, or even remote code execution depending on the application's architecture. The vulnerability affects all versions prior to v0.26.0, making it a widespread concern for organizations that have not yet updated their Frourio implementations. The lack of validation in specific situations creates unpredictable application behavior that can be exploited systematically.
Security professionals should note that this vulnerability requires a specific combination of framework versions and integration patterns to manifest, making it somewhat targeted but still significant given the potential for exploitation. The recommended remediation involves updating to Frourio version 0.26.0 or later, which includes fixes for the validation pipeline. Additionally, the installation of class-transformer and reflect-metadata packages is essential as these dependencies provide the necessary runtime support for proper validation functionality. The mitigation strategy aligns with ATT&CK technique T1525 "Implant Container Image" through the requirement for proper dependency management and framework updates to prevent exploitation. Organizations should implement comprehensive testing procedures to verify that all input validation mechanisms are functioning correctly after applying the patches, ensuring that the updated framework properly validates all request parameters through the validators/ directory structure.