Diebold Nixdorf Vynamic Security Suite (VSS) before 3.3.0 SR16, 4.0.0 SR06, 4.1.0 SR04, 4.2.0 SR03, and 4.3.0 SR01 fails to validate symlin…

published 2024-08-08 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-37376

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 20%
public exploits: 0; none known

Diebold Nixdorf Vynamic Security Suite (VSS) before 3.3.0 SR16, 4.0.0 SR06, 4.1.0 SR04, 4.2.0 SR03, and 4.3.0 SR01 fails to validate symlinks during the Pre-Boot Authorization (PBA) process. This can be exploited by a physical attacker who is able to manipulate the contents of the system's hard disk.

Patch / fix

fixed in 1

dieboldnixdorf vynamic_security_suite 3.3.0 SR16, 4.0.0 SR06, 4.1.0 SR04, 4.2.0 SR03, 4.3.0 SR01

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 2 y ago (2024-08-09)

Exploit prediction

0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

media.defcon.org https://media.defcon.org/DEF%20CON%2032/DEF%20CON%2032%20presentations/DEF%20CON%2032%20-%20Matt%20Burch%20-%20Where%E2%80%99s%20the%20Money%20-%20Defeating%20ATM%20Disk%20Encryption-white%20paper.pdf referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD	3.1	6.8	CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

dieboldnixdorf vynamic_security_suite

Classification

Weakness

CWE-94 Improper Control of Generation of Code
CWE-354 Improper Validation of Integrity Check Value

References

media.defcon.org /DEF%20CON%2032/DEF%20CON%2032%20presentations/DEF%20CON%2032%20-%20Matt%20Burch%20-%20Where%E2%80%99s%20the%2
exploit, third-party-advisory
dieboldnixdorf.com /en-us/banking/portfolio/software/security/
vendor-advisory

Sources

CVE List CVE-2023-33206
NVD CVE-2023-33206

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Summary