CVE-2019-13763 in Chrome
Summary
by MITRE
Insufficient policy enforcement in payments in Google Chrome prior to 79.0.3945.79 allowed a remote attacker who had compromised the renderer process to leak cross-origin data via a crafted HTML page.
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Analysis
by VulDB Data Team • 03/10/2024
This vulnerability represents a critical breakdown in Chrome's cross-origin resource sharing policies within the payment handling subsystem. The flaw exists in the browser's implementation of payment request APIs where insufficient validation occurs when processing cross-origin requests. Attackers exploiting this weakness could leverage a compromised renderer process to bypass security boundaries and access sensitive data from different origins. The vulnerability specifically affects Chrome versions prior to 79.0.3945.79, indicating a targeted issue within the payment processing pipeline that was not adequately protected against malicious cross-origin access attempts.
The technical implementation flaw stems from inadequate sandboxing controls during payment request processing. When a renderer process is compromised through a separate attack vector such as a phishing page or malicious advertisement, the attacker can craft malicious HTML pages that exploit the insufficient policy enforcement. This allows the malicious code to access payment information and other sensitive data from different origins without proper authorization. The vulnerability demonstrates a failure in Chrome's security model where cross-origin data isolation is not properly maintained during payment processing operations, creating a pathway for data leakage that violates fundamental web security principles.
The operational impact of this vulnerability extends beyond simple information disclosure, as it enables sophisticated attacks that can harvest payment credentials, personal financial information, and other sensitive data from users. Attackers can leverage this vulnerability to conduct targeted attacks against users who interact with compromised websites, particularly those that handle payment transactions. The risk is compounded by the fact that the attacker only needs to compromise the renderer process, which is a common attack surface through various delivery mechanisms including drive-by downloads, malicious advertisements, or social engineering campaigns. This makes the vulnerability particularly dangerous in real-world scenarios where users frequently interact with untrusted web content.
Mitigation strategies should focus on immediate browser updates to version 79.0.3945.79 or later where the vulnerability has been patched. Organizations should implement comprehensive monitoring for suspicious payment-related activities and ensure all users maintain current browser versions. Additional protective measures include deploying content security policies that restrict cross-origin resource access, implementing strict sandboxing configurations, and conducting regular security assessments of payment processing systems. The vulnerability aligns with CWE-693, which addresses protection mechanism failures in web applications, and maps to ATT&CK technique T1059.004 for scripting languages and T1566 for social engineering attacks that could lead to renderer compromise. Network administrators should also consider implementing web application firewalls to detect and block suspicious payment-related requests that could exploit this vulnerability.