Security Resilience

CVE-2023-34397

DoS in Headunit Ntg6 Mercedes-Benz User Experience ≤ 2021

Published
13 February 2025
Modified
27 June 2025
CVSS Score v3.1 7.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0064 49th percentile
Risk Priority 58 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2023-34397 is a high-severity Uncontrolled Resource Consumption (CWE-400) vulnerability in Mercedes-Benz Headunit Ntg6 Mercedes-Benz User Experience. Its CVSS base score is 7.5 (High).

Operationally, ranked at the 49th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SC-5 (Denial-of-service Protection) and SC-6 (Resource Availability) — see the control section below for these in your framework.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

CVE-2023-34397 affects the Mercedes Benz head-unit NTG 6, which includes functions for importing or exporting profile settings over USB. The vulnerability arises during parsing of these settings, allowing an attacker to trigger a crash of the associated service, resulting in a denial-of-service condition. Classified under CWE-400 (Uncontrolled Resource Consumption), it carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H), indicating high availability impact with no effects on confidentiality or integrity.

An unauthenticated attacker (PR:N) can exploit this over a network vector (AV:N) with low attack complexity and no user interaction required. Exploitation crashes the service, disrupting availability on the affected head-unit.

Mitigation details are outlined in the security research advisory at https://securelist.com/mercedes-benz-head-unit-security-research/115218/.

EU & UK References

Vulnerability Data

Mercedes Benz head-unit NTG 6 contains functions to import or export profile settings over USB. During parsing you can trigger that the service will be crashed.

CWE(s)

Related Threats

CVEs Like This One

CVE-2023-34402Same product: Mercedes-Benz Headunit Ntg6 Mercedes-Benz User Experience
CVE-2023-34404Same product: Mercedes-Benz Headunit Ntg6 Mercedes-Benz User Experience
CVE-2024-37603Same product: Mercedes-Benz Headunit Ntg6 Mercedes-Benz User Experience
CVE-2023-34400Same product: Mercedes-Benz Headunit Ntg6 Mercedes-Benz User Experience
CVE-2024-37602Same product: Mercedes-Benz Headunit Ntg6 Mercedes-Benz User Experience
CVE-2023-34406Same product: Mercedes-Benz Headunit Ntg6 Mercedes-Benz User Experience
CVE-2023-34401Same product: Mercedes-Benz Headunit Ntg6 Mercedes-Benz User Experience
CVE-2024-37601Same product: Mercedes-Benz Headunit Ntg6 Mercedes-Benz User Experience
CVE-2023-34403Same product: Mercedes-Benz Headunit Ntg6 Mercedes-Benz User Experience
CVE-2024-37600Same product: Mercedes-Benz Headunit Ntg6 Mercedes-Benz User Experience

Affected Assets

mercedes-benz
headunit ntg6 mercedes-benz user experience
≤ 2021

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SC-5 directly limits the effects of resource-exhaustion events that constitute uncontrolled consumption.

SC-6 enforces explicit allocation limits on resources, structurally preventing the weakness from occurring.

Process isolation confines resource consumption to separate domains, reducing blast radius without stopping the root flaw.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

finds

Pre-agreed severity-based prioritization and resource allocation during incident triage reduce the likelihood that an attacker-induced resource exhaustion will overwhelm the organization before corrective action is taken.

finds

Early notification of anomalous resource consumption or system malfunctions enables throttling or isolation before availability is lost.

A.8.15 Logging partial match
finds

Specifying log storage limits and rotation procedures reduces the risk that unbounded log growth will exhaust disk or memory resources and cause denial of service.

finds

Resource-utilization monitoring and alerting on bottlenecks or overloads limits the impact of denial-of-service or resource-exhaustion attacks.

blocks

A.8.20 implements network-level protections (firewalls, segmentation, protocol hardening, monitoring, authentication of systems/devices) that can limit abuse of a resource-consuming weakness but do not stop the weakness from being exploitable; the flaw remains present in the product and can still be triggered from an authorized or internal context.

blocks

Monitoring network service usage and applying controls to restrict access when necessary limits an attacker’s ability to consume excessive resources through unrestricted or unauthenticated service calls.

Hardening callouts derived

DISA STIG baselines are authored against specific weaknesses. Where this CVE cites a broad weakness class, the mapping is not asserted at that abstraction (owner ruling, 2026-09-25: grade only at Base and below), so no rule is shown here rather than a rule shown against the wrong grain.

  • No fine-grained STIG row for CWE-400, a class-level weakness. Rules are authored against its narrower children: CWE-770.

References