Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
Required
Privileges Required
None
Attack Vector
Physical
0

CVE-2023-40660

Disclosure Date: November 06, 2023 •
CVE-2023-40660 CVSS v3 Base Score: 6.6
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Description

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.

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CVSS V3 Severity and Metrics
Base Score:
6.6 Medium
Impact Score:
5.9
Exploitability Score:
0.7
Vector:
CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector (AV):
Physical
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
Required
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
Red Hat Enterprise Linux 8 not down converted
Red Hat Enterprise Linux 9 not down converted
Red Hat Enterprise Linux 7 not down converted
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Vendors

  • opensc project,
  • redhat

Products

  • enterprise linux 8.0,
  • enterprise linux 9.0,
  • opensc
Technical Analysis