CVE-2018-19589

Severity Score

6.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Incorrect Access Controls of Security Officer (SO) in PKCS11 R2 provider that ships with the Utimaco CryptoServer HSM product package allows an SO authenticated to a slot to retrieve attributes of keys marked as private keys in external key storage, and also delete keys marked as private keys in external key storage. This compromises the availability of all keys configured with external key storage and may result in an economic attack in which the attacker denies legitimate users access to keys while maintaining possession of an encrypted copy (blob) of the external key store for ransom. This attack has been dubbed reverse ransomware attack and may be executed via a physical connection to the CryptoServer or remote connection if SSH or remote access to LAN CryptoServer has been compromised. The Confidentiality and Integrity of the affected keys, however, remain untarnished.

Los Controles de Acceso incorrectos del Security Officer (SO) en el proveedor PKCS11 R2 que se envía con el paquete del producto Utimaco CryptoServer HSM permite que un SO identificado en un espacio recupere los atributos de las claves marcadas como claves privadas en el almacenamiento de las claves externas, y también elimine las claves marcadas como claves privadas en el almacenamiento de las claves externas. Esto compromete la disponibilidad de todas las claves configuradas con almacenamiento de claves externas y puede resultar en un ataque económico en el cual el atacante niega el acceso de los usuarios legítimos a las claves mientras mantiene la posesión de una copia encriptada (blob) del almacén de clave externo para obtener un rescate. Este ataque se ha denominado ataque de ransomware inverso y puede ejecutarse por medio de una conexión física a CryptoServer o conexión remota si SSH o el acceso remoto a LAN CryptoServer se ha comprometido. La confidencialidad y la integridad de las claves afectadas, sin embargo, permanecen intactas.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2018-11-26 CVE Reserved
2019-04-09 CVE Published
2023-03-08 EPSS Updated
2024-08-05 CVE Updated
2024-08-05 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-732: Incorrect Permission Assignment for Critical Resource

CAPEC

References (2)

URL	Tag	Source

URL	Date	SRC
https://www.linkedin.com/pulse/does-hsm-guarantee-cryptographic-key-security-kwadjo-nyante	2024-08-05

URL	Date	SRC

URL	Date	SRC
https://support.hsm.utimaco.com/support/security-advisories/-/blogs/cve-2018-19589	2019-10-03

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Utimaco Search vendor "Utimaco"	Securityserver Cse Firmware Search vendor "Utimaco" for product "Securityserver Cse Firmware"	>= 4.00 Search vendor "Utimaco" for product "Securityserver Cse Firmware" and version " >= 4.00"	-	Affected	in	Utimaco Search vendor "Utimaco"	Securityserver Cse Search vendor "Utimaco" for product "Securityserver Cse"	-	-	Safe