CVE-2024-9369 in Chrome
Summary
by MITRE • 11/27/2024
Insufficient data validation in Mojo in Google Chrome prior to 129.0.6668.89 allowed a remote attacker who had compromised the renderer process to perform an out of bounds memory write via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 11/20/2025
The vulnerability identified as CVE-2024-9369 represents a critical security flaw within Google Chrome's Mojo framework, specifically affecting versions prior to 129.0.6668.89. This issue falls under the category of insufficient data validation, a common weakness that can lead to severe memory corruption vulnerabilities. The Mojo framework serves as a core component in Chrome's architecture, facilitating communication between different processes and handling various data processing tasks. The vulnerability's classification as High severity by Chromium security team underscores its potential for significant impact when exploited by remote attackers.
The technical flaw manifests as an out of bounds memory write condition that occurs when the Mojo framework fails to properly validate input data from crafted HTML pages. When a renderer process is compromised, an attacker can leverage this vulnerability to write data beyond the allocated memory boundaries, potentially corrupting adjacent memory regions. This type of vulnerability typically arises when developers assume certain data constraints without implementing proper validation checks, allowing malicious inputs to bypass safety mechanisms. The flaw specifically affects how the Mojo framework processes data received through HTML content, making it particularly dangerous in web browsing contexts where users may encounter untrusted content.
The operational impact of CVE-2024-9369 extends beyond simple memory corruption, as it provides a pathway for remote code execution when combined with a compromised renderer process. Attackers who have already gained access to the renderer process can exploit this vulnerability to escalate their privileges and potentially execute arbitrary code with the privileges of the compromised process. This represents a significant threat to user security as it allows attackers to bypass traditional security boundaries within the browser architecture. The vulnerability's exploitation requires an initial compromise of the renderer process, which is often achieved through other means such as drive-by downloads or social engineering attacks, making it part of a broader attack chain.
From a cybersecurity perspective, this vulnerability aligns with CWE-129, which addresses insufficient validation of length of input data, and is related to the broader class of memory safety issues that affect modern web browsers. The ATT&CK framework categorizes this as a privilege escalation technique, specifically under T1068, which involves the exploitation of legitimate credentials or processes to gain higher privileges. Organizations should prioritize patching affected Chrome versions immediately, as the vulnerability's high severity rating indicates a significant risk to user data and system integrity. The remediation process requires updating to Chrome version 129.0.6668.89 or later, which includes proper input validation mechanisms that prevent the out of bounds memory write condition. Security teams should also implement monitoring for suspicious renderer process activities and consider deploying additional security layers such as exploit protection mechanisms and application whitelisting to reduce the attack surface.