CVE-2024-3184 Overview
CVE-2024-3184 covers multiple NULL pointer dereference flaws in the EmbedThis GoAhead Web Server through version 6.0.0. The issues appear when the server is compiled with the ME_GOAHEAD_REPLACE_MALLOC flag and no memory notifier is registered for allocation failures. Remote attackers can send crafted HTTP requests that trigger unhandled allocation failures, dereference a NULL pointer, and crash the server process. The result is a denial-of-service condition against the affected embedded web service. GoAhead is widely deployed in embedded devices, IoT products, and industrial equipment, which broadens the exposure of this class of defect.
Critical Impact
Remote unauthenticated attackers can crash the GoAhead Web Server, producing a denial-of-service condition on embedded devices and network appliances that depend on it.
Affected Products
- EmbedThis GoAhead Web Server versions up to and including 6.0.0
- Builds compiled with the ME_GOAHEAD_REPLACE_MALLOC compile-time flag
- Embedded devices and appliances shipping GoAhead without a registered memory allocation-failure notifier
Discovery Timeline
- 2024-10-17 - CVE-2024-3184 published to the National Vulnerability Database (NVD)
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-3184
Vulnerability Analysis
The defect is a set of NULL pointer dereferences classified as [CWE-476]. GoAhead includes an optional build mode, activated by ME_GOAHEAD_REPLACE_MALLOC, that replaces the standard allocator with an internal one. In this mode the runtime expects a memory notifier callback that handles allocation failures. When the callback is absent, functions that request memory during request parsing receive NULL and continue to dereference the returned pointer. A remote attacker who sends malicious or malformed HTTP input can steer the server into these code paths and force the crash.
Root Cause
The root cause is missing return-value validation combined with an unregistered allocation-failure notifier. Code paths reached during request handling assume allocation success and do not check pointers before use. Under the ME_GOAHEAD_REPLACE_MALLOC build, exhaustion or refusal of allocation returns NULL, and subsequent field access or function calls dereference invalid memory. The process terminates on segmentation fault.
Attack Vector
Exploitation is remote and unauthenticated. An attacker only needs network reach to the HTTP or HTTPS listener exposed by the GoAhead server. Repeated crafted requests can drive the server into allocation states that trigger the dereference. The attack complexity is elevated because triggering requires specific conditions in memory allocation behavior, but no user interaction or privileges are required. Successful exploitation yields loss of availability only, with no impact to confidentiality or integrity. Refer to the Nozomi Networks Vulnerability Advisory for the full technical breakdown.
Detection Methods for CVE-2024-3184
Indicators of Compromise
- Unexpected termination or repeated restarts of the GoAhead web server process on embedded devices
- Segmentation fault entries or core dumps referencing GoAhead request-handling functions
- Bursts of malformed or oversized HTTP requests directed at the GoAhead listener prior to a crash
- Availability monitoring alerts showing intermittent HTTP service loss from IoT or OT assets
Detection Strategies
- Baseline expected request patterns against the GoAhead server and alert on anomalous request rates or payload sizes.
- Correlate device availability failures with inbound HTTP traffic to detect coordinated crash attempts.
- Track process restart counts on embedded appliances that expose GoAhead management interfaces.
Monitoring Recommendations
- Ingest HTTP access and error logs from GoAhead-enabled devices into a centralized logging pipeline.
- Monitor for repeated 5xx responses, connection resets, and TCP RST bursts against the management interface.
- Alert on device unreachability events on network segments where GoAhead-based devices operate.
How to Mitigate CVE-2024-3184
Immediate Actions Required
- Inventory all embedded devices and appliances that ship the GoAhead Web Server and identify their firmware versions.
- Restrict network access to GoAhead management interfaces so only trusted administrative hosts can reach them.
- Contact device vendors to confirm whether their firmware uses the ME_GOAHEAD_REPLACE_MALLOC build option.
Patch Information
At time of writing, the NVD entry lists no upstream fixed version. Consult the Nozomi Networks Vulnerability Advisory and the EmbedThis GoAhead project for the latest patch status. Device operators should apply any firmware update from their equipment vendor that references CVE-2024-3184 or upgrades GoAhead beyond version 6.0.0.
Workarounds
- Rebuild GoAhead without the ME_GOAHEAD_REPLACE_MALLOC flag where source access is available.
- Register a memory notifier that safely handles allocation failures if the replacement allocator must remain in use.
- Place GoAhead-based devices behind a reverse proxy or firewall that rate-limits and filters malformed HTTP requests.
- Segment IoT and OT networks so that GoAhead listeners are not reachable from untrusted or internet-facing zones.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
