CVE-2023-34402
Memory Safety in Headunit Ntg6 Mercedes-Benz User Experience ≤ 2021
Raw vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:HCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2023-34402 is a high-severity Out-of-bounds Write (CWE-787) vulnerability in Mercedes-Benz Headunit Ntg6 Mercedes-Benz User Experience. Its CVSS base score is 7.7 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Security Account Manager (T1003.002); 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-15 (Development Process, Standards, and Tools) — 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-2023-34402 is a vulnerability in the Mercedes-Benz head-unit NTG6, which includes functions for importing or exporting profile settings over USB. During processing, an encapsulated file inside the imported file is dropped by the service. Due to missing checks, this enables arbitrary file write with the privileges of the speech service. The issue is associated with CWE-787 and carries a CVSS score of 7.7 (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H).
An attacker with local access can exploit the vulnerability by crafting a malicious USB file for profile import, requiring no privileges or user interaction. Exploitation results in arbitrary file write capabilities under the speech service's rights, potentially compromising file integrity and availability.
The primary advisory reference is available at https://securelist.com/mercedes-benz-head-unit-security-research/115218/, which details the Mercedes-Benz head-unit security research.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-38480
Vulnerability Data
Mercedes-Benz head-unit NTG6 contains functions to import or export profile settings over USB. Inside file is encapsulate another file, which service will drop during processing. Due to missed checks, attacker can achieve Arbitrary File Write with service speech rights.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Developer testing and evaluation (including fuzzing and bounds checks) finds out-of-bounds write flaws before deployment.
Requiring documented secure-development standards and tools can mandate bounds-checked coding practices that avoid the weakness.
Input validation can structurally reject or sanitize data that would otherwise trigger an out-of-bounds write.
Memory-protection mechanisms limit the exploitability and blast radius of a successful out-of-bounds write.
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.
Vulnerability scanning and recording can discover out-of-bounds write flaws so they can be remediated.
Patching or replacing vulnerable software directly eliminates known instances of this coding weakness.
Secure-development practices (static analysis, bounds checking, code review) are the primary means of preventing out-of-bounds writes.
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.