CVE-2023-40660

Opensc: potential pin bypass when card tracks its own login state

Severity Score

6.6

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A flaw was found in OpenSC packages that allow a potential PIN bypass. When a token/card is authenticated by one process, it can perform cryptographic operations in other processes when an empty zero-length pin is passed. This issue poses a security risk, particularly for OS logon/screen unlock and for small, permanently connected tokens to computers. Additionally, the token can internally track login status. This flaw allows an attacker to gain unauthorized access, carry out malicious actions, or compromise the system without the user's awareness.

Se encontró una falla en los paquetes OpenSC que permiten una posible omisión del PIN. Cuando un token/tarjeta es autenticado por un proceso, puede realizar operaciones criptográficas en otros procesos cuando se pasa un pin vacío de longitud cero. Este problema plantea un riesgo de seguridad, particularmente para el inicio de sesión/desbloqueo de pantalla del sistema operativo y para tokens pequeños conectados permanentemente a las maquinas. Además, el token puede rastrear internamente el estado de inicio de sesión. Esta falla permite que un atacante obtenga acceso no autorizado, lleve a cabo acciones maliciosas o comprometa el sistema sin que el usuario se de cuenta.

*Credits: Upstream acknowledges Deepanjan Pal (Oracle Corporation) as the original reporter.

CVSS Scores

NISTv3.1 6.6

Attack Vector

Physical

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2023-08-18 CVE Reserved
2023-11-06 CVE Published
2023-12-14 EPSS Updated
2024-09-16 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-287: Improper Authentication

CAPEC

References (11)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2023/12/13/2
https://github.com/OpenSC/OpenSC/issues/2792#issuecomment-1674806651	Issue Tracking
https://github.com/OpenSC/OpenSC/releases/tag/0.24.0-rc1	Release Notes
https://lists.debian.org/debian-lts-announce/2023/11/msg00024.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3CPQOMCDWFRBMEFR5VK4N5MMXXU42ODE
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GLYEFIBBA37TK3UNMZN5NOJ7IWCIXLQP

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/errata/RHSA-2023:7876	2023-12-23
https://access.redhat.com/errata/RHSA-2023:7879	2023-12-23
https://access.redhat.com/security/cve/CVE-2023-40660	2023-12-19
https://bugzilla.redhat.com/show_bug.cgi?id=2240912	2023-12-19
https://github.com/OpenSC/OpenSC/wiki/OpenSC-security-advisories	2023-12-23

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Opensc Project Search vendor "Opensc Project"		Opensc Search vendor "Opensc Project" for product "Opensc"				<= 0.23.0 Search vendor "Opensc Project" for product "Opensc" and version " <= 0.23.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				9.0 Search vendor "Redhat" for product "Enterprise Linux" and version "9.0"		-		Affected