CVE-2023-34401

Heap-memory disclosure via unchecked UD2 encapsulated-file size

Published Feb 13, 2025 · Updated Mar 18, 2025

Out-of-bounds read in Mercedes Benz NTG 6 allows physically proximate attackers to read heap memory via a crafted USB profile backup. The profile-import path decodes a proprietary UD2 file and reads its encapsulated content without validating its size against the allocated heap buffer. Physical access to the exposed in-vehicle USB service and interaction to import the backup are required; the reported consequence is limited to adjacent heap-memory disclosure.

CVSS severity3.7
Low
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Mercedes Benz NTG 6 allows physically proximate attackers to read heap memory via a crafted USB profile backup. The profile-import path decodes a proprietary UD2 file and reads its encapsulated content without validating its size against the allocated heap buffer. Physical access to the exposed in-vehicle USB service and interaction to import the backup are required; the reported consequence is limited to adjacent heap-memory disclosure.

The record

CVE
CVE-2023-34401
Published
Feb 13, 2025
Updated
Mar 18, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125, T1200
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 13, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 18, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

3.7CISA-ADPCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1200Hardware Additions

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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