CVE-2024-9959 Overview
CVE-2024-9959 is a use-after-free vulnerability in the DevTools component of Google Chrome versions prior to 130.0.6723.58. The flaw allows a remote attacker who has already compromised the renderer process to trigger heap corruption through a crafted Chrome Extension. Successful exploitation can lead to arbitrary code execution within the browser context. The vulnerability is categorized under CWE-416 and requires user interaction to trigger the malicious extension flow. Google addressed the issue in the Chrome Stable Channel update released in October 2024.
Critical Impact
An attacker with a compromised renderer can chain this use-after-free to corrupt the heap, escalate privileges within Chrome, and execute code through a crafted extension.
Affected Products
- Google Chrome versions prior to 130.0.6723.58 (Desktop)
- Chromium-based browsers incorporating the vulnerable DevTools component
- Environments permitting installation of untrusted Chrome Extensions
Discovery Timeline
- 2024-10-15 - Google publishes the Chrome Stable Channel Update addressing the issue
- 2024-10-15 - CVE-2024-9959 published to NVD
- 2025-01-02 - Last updated in NVD database
Technical Details for CVE-2024-9959
Vulnerability Analysis
The vulnerability resides in Chrome's DevTools subsystem, which provides debugging, inspection, and instrumentation interfaces to web pages and extensions. A use-after-free condition occurs when DevTools code retains a pointer to a heap object after that object has been freed. When the dangling pointer is subsequently dereferenced, the attacker controls the contents of the reallocated memory region. This produces heap corruption that can be shaped into arbitrary read, arbitrary write, or control-flow hijack primitives. Exploitation depends on first compromising the renderer process, then leveraging a crafted Chrome Extension to invoke the affected DevTools code path. The Chromium security team classified the severity internally as Medium, while the CVSS base score reflects the broader impact when the prerequisites are met.
Root Cause
The root cause is improper object lifetime management within DevTools [CWE-416]. A reference to a DevTools-managed object persists beyond the object's deallocation, leaving a dangling pointer that the renderer can reuse during extension-driven operations.
Attack Vector
The attack requires a prior renderer compromise, typically achieved through a separate browser vulnerability or malicious web content. The attacker then loads or triggers a crafted Chrome Extension that exercises the vulnerable DevTools path. User interaction is required to install or activate the extension. Once the use-after-free fires, the attacker grooms the heap to control freed memory contents and pivot toward code execution inside the browser process.
No verified public exploit code is available. Technical details are tracked in the Chromium Issue Tracker Entry and the Chrome Stable Channel Update.
Detection Methods for CVE-2024-9959
Indicators of Compromise
- Unexpected Chrome Extensions installed outside enterprise allowlists, particularly those requesting DevTools or debugger permissions.
- Chrome renderer process crashes referencing DevTools modules or heap corruption signatures in crash dumps.
- Anomalous child processes spawned by chrome.exe following extension activity.
Detection Strategies
- Inventory installed extensions across the fleet and compare against an approved baseline to surface unauthorized or sideloaded extensions.
- Monitor Chrome version telemetry to identify endpoints running builds earlier than 130.0.6723.58.
- Alert on renderer crash reports that reference DevTools frames, which can indicate exploitation attempts.
Monitoring Recommendations
- Centralize browser telemetry, including extension installation events and crash reports, into a SIEM for correlation.
- Track outbound connections initiated by Chrome subprocesses to domains hosting attacker infrastructure.
- Audit chrome://extensions policy compliance using enterprise management tools such as Chrome Browser Cloud Management.
How to Mitigate CVE-2024-9959
Immediate Actions Required
- Update Google Chrome to version 130.0.6723.58 or later on all managed endpoints.
- Restart Chrome across the environment to ensure the patched binaries are loaded into memory.
- Restrict extension installation to an enterprise allowlist through group policy or Chrome Browser Cloud Management.
Patch Information
Google released the fix in Chrome Stable Channel build 130.0.6723.58 for desktop platforms. Refer to the Chrome Stable Channel Update for full release notes and platform-specific build identifiers. Chromium-derived browsers should apply equivalent upstream patches.
Workarounds
- Disable installation of third-party extensions using the ExtensionInstallBlocklist policy set to * and explicitly allowlist approved IDs.
- Block access to chrome://devtools and developer tools for non-developer user populations via the DeveloperToolsAvailability policy.
- Enforce Chrome auto-update so future renderer or DevTools vulnerabilities are remediated without manual intervention.
# Configuration example: enforce Chrome extension allowlist via policy (Windows)
reg add "HKLM\SOFTWARE\Policies\Google\Chrome\ExtensionInstallBlocklist" /v 1 /t REG_SZ /d "*" /f
reg add "HKLM\SOFTWARE\Policies\Google\Chrome\ExtensionInstallAllowlist" /v 1 /t REG_SZ /d "<approved-extension-id>" /f
reg add "HKLM\SOFTWARE\Policies\Google\Chrome" /v DeveloperToolsAvailability /t REG_DWORD /d 2 /f
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
