CVE-2023-24064Public exploit

Pre-boot code execution via unchecked init configuration

Published Aug 8, 2024 · Updated Mar 13, 2025

Improper validation in Diebold Nixdorf Vynamic Security Suite before 3.3.0 SR4 allows physically proximate attackers to execute commands. During PBA, the integrity check omits /etc/initab from its hard-coded SHA-256 index, so attacker-supplied init entries survive validation and run during the Linux boot phase. Exploitation requires physical disk access and permits pre-boot code execution before the encrypted Windows volume starts.

CVSS severity6.8
Medium
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper validation in Diebold Nixdorf Vynamic Security Suite before 3.3.0 SR4 allows physically proximate attackers to execute commands. During PBA, the integrity check omits /etc/initab from its hard-coded SHA-256 index, so attacker-supplied init entries survive validation and run during the Linux boot phase. Exploitation requires physical disk access and permits pre-boot code execution before the encrypted Windows volume starts.

The record

CVE
CVE-2023-24064
Published
Aug 8, 2024
Updated
Mar 13, 2025
Vendor
Diebold Nixdorf
Product
Vynamic Security Suite
Classifications
T1547
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 8, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 13, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=18.12

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Diebold Nixdorf · Vynamic Security Suiteversion=18.12

Published CVSS scores

6.8CISA-ADPCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.8NIST NVDCVSS:3.1/AV:P/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

T1547Boot or Logon Autostart Execution

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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