CVE-2024-4947 in Chrome
Summary
by MITRE • 05/16/2024
Type Confusion in V8 in Google Chrome prior to 125.0.6422.60 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 12/16/2025
This vulnerability represents a critical type confusion flaw within the V8 JavaScript engine that powers Google Chrome's rendering and execution capabilities. The issue manifests as a fundamental mismatch in how the engine handles different data types during runtime operations, creating a condition where memory corruption can occur when processing maliciously crafted web content. The vulnerability exists in the type checking mechanisms that should prevent operations between incompatible data structures, but fails to properly validate type integrity during dynamic execution contexts.
The technical exploitation occurs when a remote attacker crafts a specific HTML page containing malicious JavaScript code that triggers the type confusion during V8's internal operations. This flaw allows attackers to manipulate the engine's type system in ways that bypass normal security boundaries, effectively breaking out of the sandboxed execution environment where web content should be isolated from the underlying operating system. The vulnerability's classification as High severity by Chromium's security team reflects the significant risk it poses to user systems, as successful exploitation can lead to complete system compromise.
The operational impact of this vulnerability extends beyond simple code execution, as it represents a fundamental breakdown in Chrome's security model that could enable attackers to perform privilege escalation, access sensitive user data, or deploy additional malware payloads. Attackers can leverage this flaw through standard web browsing activities, making it particularly dangerous as it requires no special privileges or user interaction beyond visiting a malicious website. The sandbox escape capability means that even if the initial attack vector is contained within the browser, the attacker gains access to the full system resources that should be protected by Chrome's security architecture.
Security mitigations for this vulnerability primarily focus on immediate remediation through the release of Chrome version 125.0.6422.60 and subsequent updates that address the underlying type confusion logic within V8. Organizations should implement proactive security measures including network-based protections such as web application firewalls and content filtering systems that can detect and block known malicious patterns. The vulnerability aligns with CWE-479 which specifically addresses the improper handling of type information in dynamic languages, and maps to ATT&CK technique T1059.007 for scripting and T1068 for local privilege escalation. Additionally, browser hardening techniques such as enabling sandboxing features, disabling unnecessary browser plugins, and maintaining up-to-date security patches should be implemented as part of comprehensive defense-in-depth strategies.