CVE-2021-23178 in Community
Summary
by MITRE • 04/25/2023
Improper access control in Odoo Community 15.0 and earlier and Odoo Enterprise 15.0 and earlier allows attackers to validate online payments with a tokenized payment method that belongs to another user, causing the victim's payment method to be charged instead.
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Analysis
by VulDB Data Team • 05/20/2023
The vulnerability described in CVE-2021-23178 represents a critical access control flaw within the Odoo ERP platform that affects both Community and Enterprise editions through version 15.0. This issue stems from insufficient validation mechanisms when processing online payments through tokenized payment methods, creating a scenario where malicious actors can exploit the system's authorization checks to redirect payments intended for one user to another user's payment method. The flaw specifically manifests during the payment validation process where the system fails to properly verify that the tokenized payment method being used belongs to the authenticated user initiating the transaction.
The technical root cause of this vulnerability lies in the improper implementation of user authentication and authorization checks within Odoo's payment processing module. When a user attempts to validate an online payment using a tokenized payment method, the system should verify that the token is associated with the currently authenticated user account. However, the vulnerability allows attackers to manipulate the payment validation flow by submitting a valid token from another user's account, bypassing the necessary access control mechanisms. This misconfiguration creates a path for privilege escalation where unauthorized users can effectively impersonate legitimate customers during payment processing. The flaw aligns with CWE-284, which specifically addresses inadequate access control implementations, and demonstrates a clear breakdown in the principle of least privilege enforcement within the payment processing workflow.
The operational impact of this vulnerability extends beyond simple financial loss, as it represents a fundamental breach in the trust model of the payment processing system. Attackers can potentially drain multiple user accounts by redirecting payments to their own accounts, causing significant financial damage to both individual users and the organization maintaining the Odoo platform. The vulnerability can be exploited through various attack vectors including web application exploitation, man-in-the-middle attacks, or by leveraging other pre-existing vulnerabilities to gain access to valid payment tokens. Organizations using Odoo versions prior to 15.0 face substantial risk of unauthorized transactions, as the flaw allows for automated payment redirection without requiring additional authentication factors. The attack surface is particularly concerning given that payment processing is a core function of most Odoo implementations, making this vulnerability highly exploitable in environments where multiple users process transactions.
Security mitigations for this vulnerability should focus on implementing robust access control mechanisms that enforce proper user authentication and authorization checks during payment validation processes. Organizations should immediately upgrade to patched versions of Odoo that address this specific access control flaw, as the vulnerability affects all versions through 15.0. Additional defensive measures include implementing stronger token validation procedures that verify ownership of payment tokens before allowing payment processing, adding transaction monitoring systems that detect unusual payment patterns, and ensuring proper session management and user context validation. The remediation process should also include comprehensive security testing of payment workflows, implementation of multi-factor authentication for payment operations, and regular security audits of the payment processing module. Organizations should consider implementing the ATT&CK technique T1548.003 for privilege escalation prevention, specifically focusing on access control bypass techniques that could be leveraged to exploit this vulnerability. Network segmentation and monitoring solutions should be deployed to detect and prevent unauthorized access attempts to payment processing systems, while incident response procedures should be updated to address potential payment fraud scenarios resulting from this vulnerability.