CVE-2023-34399Public exploit

Code execution via negative Boost archive index

Published Feb 13, 2025 · Updated Mar 24, 2025

Integer overflow in Mercedes-Benz NTG6 head units from 2021 and earlier allows physically proximate attackers to execute code via crafted USB backup. During profile import, capthrift::CapServer::setProfile deserializes attacker-controlled SQLite values with Boost and accepts a negative cid as an array index, corrupting an object pointer before a virtual call. Physical access to the exposed vehicle USB port and a crafted uapreds.ud2 database are required; successful exploitation controls CAPServer execution, while failed attempts can trap the service in a restart loop.

CVSS severity9.8
Critical
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in Mercedes-Benz NTG6 head units from 2021 and earlier allows physically proximate attackers to execute code via crafted USB backup. During profile import, capthrift::CapServer::setProfile deserializes attacker-controlled SQLite values with Boost and accepts a negative cid as an array index, corrupting an object pointer before a virtual call. Physical access to the exposed vehicle USB port and a crafted uapreds.ud2 database are required; successful exploitation controls CAPServer execution, while failed attempts can trap the service in a restart loop.

The record

CVE
CVE-2023-34399
Published
Feb 13, 2025
Updated
Mar 24, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-190, T1200
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 13, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 24, 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

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 exploitPublished

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
T1200Hardware Additions

Public exploit references

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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