CVE-2023-7024 is a heap buffer overflow vulnerability in Google Chromium WebRTC. CISA added it to the Known Exploited Vulnerabilities catalogue on 2 January 2024, which means attackers have used it in real attacks. This vulnerability could impact web browsers using WebRTC, including but not limited to Google Chrome.
What This Vulnerability Means
A heap buffer overflow in Chromium WebRTC is a memory-safety flaw in the browser’s real-time communication stack. Because WebRTC is built into browser-based voice, video, and data sessions, a flaw in this component can turn normal browsing into a crash, denial of service, or, in the worst case, code execution path.
For a browser CVE, the danger is not just the bug itself, but the trust placed in a component that handles rich, externally supplied media and session data. Memory corruption in that path can be especially attractive because the browser runs with broad user interaction and, often, high-value authenticated sessions already open.
Why It Is Dangerous in WebRTC-Enabled Browsers
WebRTC is used for conferencing, collaboration, customer support, and embedded communications, which means exposure can be widespread wherever browsers accept live peer-to-peer or media-driven content. A defect in the parsing or handling of WebRTC data can be reached during ordinary use, so the attack surface is tied to both browser deployment and user activity.
The practical concern is that exploitation may happen through a page, meeting invite, or service that users believe is routine. Once a memory corruption condition is triggered, the attacker may gain a foothold inside the browser process or destabilise the session in a way that supports follow-on exploitation.
How Organisations Check Exposure and Prioritise Response
Exposure review starts with an inventory of browsers and the channels that use WebRTC, especially endpoints that regularly join external meetings or open untrusted web content. Organisations should confirm whether their browser estate is currently affected by consulting vendor advisories and the CISA Known Exploited Vulnerabilities catalogue, rather than relying on the CVE entry alone.
Priority should rise when the browser is internet-facing, widely used, or tied to sensitive identity sessions, because those conditions increase the value of a successful exploit. This is where a structured vulnerability management guide helps teams rank exploitability, asset criticality, and remediation urgency.
Mitigation, Detection, and Post-Exploitation Review
If patching is not immediately possible, reduce exposure by limiting untrusted browsing, segmenting high-risk users, and tightening browser hardening and extension policy. Where the browser is used for sensitive work, compensating controls should assume that a successful browser exploit can expose the active session, local user context, or any in-memory material the browser can reach.
Detection is often difficult because exploitation may look like a crash, tab failure, or browser instability rather than an obvious intrusion. After patching, review for abnormal browser crashes, unexpected process trees, suspicious network activity, and any sign that the affected endpoint was used to access accounts or services that should now be treated as potentially exposed.
When a browser exploit is suspected, the CVE Program and NIST National Vulnerability Database are the right references for authoritative record data, while the browser vendor advisory should guide version and remediation specifics.
Risk and Threat Considerations
This kind of flaw matters because browser exploits can convert a routine web interaction into an initial access event. In a browser component that processes media and real-time communications, the attacker’s objective is often to move from a crashable input path to code execution, persistence inside the session, or secondary access to data already available in the browser context.
Failure mechanism: A heap buffer overflow corrupts memory in a process that is designed to handle untrusted external inputs, which can enable instability, process compromise, or exploit chaining.
Impact: Successful exploitation can undermine browser trust, expose active sessions and user data, and create a launch point for broader compromise on the endpoint.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
MITRE ATT&CK addresses the attack and risk surface, while NIST SP 800-53 Rev 5, NIST CSF 2.0 and CIS Controls v8 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST SP 800-53 Rev 5 | SI-2 — Flaw Remediation | Heap overflow CVEs require tracked remediation and patching for affected software. |
| SI-4 — System Monitoring | Browser exploit attempts and post-exploit anomalies need monitoring and detection. | |
| Recommendation — Prioritise SI-2 response to remediate the browser vulnerability and verify deployment across the fleet. Use SI-4 to detect exploit symptoms, crash patterns, and suspicious browser behaviour. | ||
| NIST CSF 2.0 | ID.RA-01 — Risk Identification | The term requires identifying exploitable browser exposure and prioritising response. |
| Recommendation — Identify affected browser exposure and rank remediation based on exploitability and business impact. | ||
| CIS Controls v8 | CIS-7 — Continuous Vulnerability Management | Actively exploited CVEs belong in continuous vulnerability management and remediation workflows. |
| Recommendation — Track the CVE in your vulnerability management process and drive rapid remediation. | ||
| MITRE ATT&CK | T1203 — Exploitation for Client Execution | Browser memory corruption can be used to execute code on the client. |
| Recommendation — Map browser exploit activity to T1203 and hunt for client-side exploitation indicators. | ||
Practitioner Guidance
Why practitioners should care: Browser CVEs in WebRTC are operationally important because they sit in a high-frequency workflow path, often on endpoints that already carry authenticated business sessions. Treat them as more than browser hygiene, because exploitation can directly affect user trust, session integrity, and endpoint assurance.
What to watch for: Look for crash clusters, unexplained browser instability, and repeated user reports tied to WebRTC-heavy workflows such as meetings or embedded communication tools. A sudden rise in these signals after exposure to untrusted content should trigger compromise review, not just restart-and-move-on troubleshooting.