Security Resilience

CVE-2023-34406

Memory Safety in Headunit Ntg6 Mercedes-Benz User Experience ≤ 2021

Memory Safety
Published
13 February 2025
Modified
27 June 2025
CVSS Score v3.1 3.3
Click a component to see what it means
Raw vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
EPSS Score 0.0022 12th percentile
Risk Priority 28 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-2023-34406 is a low-severity Integer Overflow or Wraparound (CWE-190) vulnerability in Mercedes-Benz Headunit Ntg6 Mercedes-Benz User Experience. Its CVSS base score is 3.3 (Low).

Operationally, exploitation aligns with the MITRE ATT&CK technique LSA Secrets (T1003.004); ranked at the 12th 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 SA-11 (Developer Testing and Evaluation) and SA-8 (Security and Privacy Engineering Principles) — see the control section below for these in your framework.

EU & UK References

Vulnerability Data

An issue was discovered on Mercedes Benz NTG 6. A possible integer overflow exists in the user data import/export function of NTG (New Telematics Generation) 6 head units. To perform this attack, local access to USB interface of the car…

more

is needed. With prepared data, an attacker can cause the User-Data service to fail. The failed service instance will restart automatically.

CWE(s)
CWE-190

Related Threats

MITRE ATT&CK Enterprise Techniques

T1003.004 LSA Secrets Credential Access
Adversaries with SYSTEM access to a host may attempt to access Local Security Authority (LSA) secrets, which can contain a variety of different credential materials, such as credentials for service accounts.
attack.mitre.org →
T1003.005 Cached Domain Credentials Credential Access
Adversaries may attempt to access cached domain credentials used to allow authentication to occur in the event a domain controller is unavailable.
attack.mitre.org →
T1003.006 DCSync Credential Access
Adversaries may attempt to access credentials and other sensitive information by abusing a Windows Domain Controller's application programming interface (API)(Citation: Microsoft DRSR Dec 2017) (Citation: Microsoft GetNCCChanges) (Citati…
attack.mitre.org →
T1003.008 /etc/passwd and /etc/shadow Credential Access
Adversaries may attempt to dump the contents of <code>/etc/passwd</code> and <code>/etc/shadow</code> to enable offline password cracking.
attack.mitre.org →
T1006 Direct Volume Access Stealth
Adversaries may directly access a volume to bypass file access controls and file system monitoring.
attack.mitre.org →
T1008 Fallback Channels Command And Control
Adversaries may use fallback or alternate communication channels if the primary channel is compromised or inaccessible in order to maintain reliable command and control and to avoid data transfer thresholds.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-34399Same product: Mercedes-Benz Headunit Ntg6 Mercedes-Benz User Experience
CVE-2024-37603Same product: Mercedes-Benz Headunit Ntg6 Mercedes-Benz User Experience
CVE-2023-34401Same product: Mercedes-Benz Headunit Ntg6 Mercedes-Benz User Experience
CVE-2024-37600Same product: Mercedes-Benz Headunit Ntg6 Mercedes-Benz User Experience
CVE-2023-34402Same product: Mercedes-Benz Headunit Ntg6 Mercedes-Benz User Experience
CVE-2024-37601Same product: Mercedes-Benz Headunit Ntg6 Mercedes-Benz User Experience
CVE-2023-34404Same 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-2023-34397Same product: Mercedes-Benz Headunit Ntg6 Mercedes-Benz User Experience

Affected Assets

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

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V5.2.6

Mitigating Controls (NIST 800-53 r5) AI

SA-11 Developer Testing and Evaluation good match

Developer testing and evaluation (static analysis, fuzzing, unit tests) directly finds integer overflow defects before deployment.

SA-8 Security and Privacy Engineering Principles partial match

Secure engineering principles require use of safe arithmetic constructs or language features that structurally eliminate integer overflow during calculation.

SI-10 Information Input Validation partial match

Input validation enforces bounds on values before arithmetic, stopping the conditions that trigger overflow or wraparound.

Mitigating Controls (NIST CSF 2.0) AI

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

PR.PS-06 partial match
blocks

Secure SDLC practices directly require use of safe arithmetic, bounds checks, and testing that prevent integer overflows.

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.

A.5.14 Information transfer partial match
removes
A.5.15 Access control partial match
removes
A.5.16 Identity management partial match
removes
A.5.17 Authentication information partial match
removes
A.5.18 Access rights partial match
removes
A.8.10 Information deletion partial match
removes

References