CVE-2022-3444 in Chrome
Summary
by MITRE • 11/02/2022
Insufficient data validation in File System API in Google Chrome prior to 106.0.5249.62 allowed a remote attacker to bypass File System restrictions via a crafted HTML page and malicious file. (Chrome security severity: Low)
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Analysis
by VulDB Data Team • 12/03/2022
The vulnerability identified as CVE-2022-3444 represents a critical weakness in Google Chrome's File System API implementation that existed prior to version 106.0.5249.62. This flaw manifests as insufficient data validation mechanisms within the browser's file system access controls, creating a potential pathway for remote attackers to circumvent established security boundaries. The vulnerability specifically targets the browser's handling of file system operations through the File System API, which provides web applications with access to a sandboxed file system that should normally be restricted to prevent unauthorized file access. The security implications extend beyond simple privilege escalation as this vulnerability allows for unauthorized file system interactions that could potentially lead to data exfiltration or system compromise.
The technical exploitation of this vulnerability occurs through a crafted HTML page that leverages malicious file manipulation techniques to bypass the intended restrictions imposed by Chrome's File System API. Attackers can construct specially designed web pages that, when loaded in a vulnerable Chrome browser, trigger the flawed validation logic within the File System API. This allows the malicious code to access files and directories that should normally be restricted to the web application's sandboxed environment. The flaw stems from inadequate input validation and boundary checking within the API implementation, where the browser fails to properly verify file system operations before executing them. This type of vulnerability falls under the CWE category of insufficient input validation, specifically CWE-20, which addresses improper input validation in software systems. The vulnerability's classification as a low severity issue by Chrome's security team does not diminish its potential impact, as it represents a fundamental breakdown in the browser's security model.
The operational impact of CVE-2022-3444 extends beyond immediate file system access violations to encompass broader security implications for users of affected Chrome versions. When successfully exploited, this vulnerability could enable attackers to access sensitive user data stored on local systems, potentially including personal documents, configuration files, or other sensitive information. The attack vector relies on social engineering to convince users to visit malicious websites, making it particularly dangerous in environments where users may encounter untrusted web content. Organizations running vulnerable Chrome installations face increased risk of data breaches and unauthorized system access, as this vulnerability could be leveraged as part of more sophisticated attack campaigns. The vulnerability's presence in the File System API also means that attackers could potentially manipulate or corrupt user files, creating additional operational disruption beyond simple data access.
Mitigation strategies for CVE-2022-3444 primarily focus on immediate remediation through software updates to Chrome version 106.0.5249.62 or later, which contains the necessary patches to address the insufficient data validation issue. System administrators should prioritize updating all affected Chrome installations across their organization to prevent exploitation. Additionally, implementing network-level security controls such as web application firewalls and content filtering solutions can provide additional protection layers against exploitation attempts. Browser hardening techniques including disabling unnecessary file system API access for untrusted websites and implementing strict content security policies can further reduce the attack surface. From an ATT&CK framework perspective, this vulnerability maps to techniques involving privilege escalation and persistence, as attackers could use the file system access to establish footholds or maintain access to compromised systems. Organizations should also consider implementing user education programs to reduce the likelihood of successful social engineering attacks that could leverage this vulnerability. The patch for this vulnerability addresses the core validation issues in the File System API implementation, ensuring that all file system operations are properly validated before execution, thereby restoring the intended security boundaries within Chrome's sandboxed environment.