CVE-2023-34399
Published: 13 February 2025
Summary
CVE-2023-34399 is a critical-severity Integer Overflow or Wraparound (CWE-190) vulnerability in Mercedes-Benz Headunit Ntg6 Mercedes-Benz User Experience. Its CVSS base score is 9.8 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 47.1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-2 (Flaw Remediation) and SI-10 (Information Input Validation).
Deeper analysis
CVE-2023-34399 is an integer overflow vulnerability (CWE-190) in a version of the Boost library used for serialization in the Mercedes-Benz head-unit NTG6. This infotainment system component includes functions to import or export profile settings over USB, where certain table values are handled as serialized archives processed by the vulnerable Boost library. The issue carries a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), indicating critical severity.
The vulnerability can be exploited by unauthenticated attackers (PR:N) over the network (AV:N) with low attack complexity (AC:L) and no user interaction (UI:N) required. Successful exploitation enables high-impact consequences, including unauthorized access to confidential data (C:H), modification of system integrity (I:H), and disruption of availability (A:H).
Mitigation guidance is detailed in the associated security research advisory at https://securelist.com/mercedes-benz-head-unit-security-research/115218/.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-38477
Vulnerability details
Mercedes-Benz head-unit NTG6 contains functions to import or export profile settings over USB. Some values of this table are serialized archive according boost library. The version of boost library contains vulnerability integer overflow.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Integer overflow in Boost serialization enables RCE via crafted profile archives (USB/network input); maps to remote app exploitation and client-side execution vectors per CVSS AV:N characteristics.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly remediates the integer overflow vulnerability in the vulnerable Boost library version used for serializing profile settings imports over USB.
Validates serialized archive data from USB profile imports to prevent malformed inputs from triggering the integer overflow during deserialization.
Provides memory protections that mitigate successful exploitation of the integer overflow for arbitrary code execution or data corruption.