CVE-2023-40660

MEDIUM EPSS 55.9%
Published Nov 6, 20232y ago · Modified Jun 17, 20261w ago
6.6 CVSS 3.1
Medium
Find Similar
Published Nov 6, 2023 2y ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

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

Threat Intelligence

EPSS Exploit Probability
55.9% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-287 Improper Authentication Authentication

Affected Products 3

VendorProductVersionRange
opensc_projectopensc* ≤0.23.0
redhatenterprise_linux8.0any
redhatenterprise_linux9.0any

References 12

  • openwall.com http://www.openwall.com/lists/oss-security/2023/12/13/2
  • access.redhat.com https://access.redhat.com/errata/RHSA-2023:7876
  • access.redhat.com https://access.redhat.com/errata/RHSA-2023:7879
  • access.redhat.com https://access.redhat.com/security/cve/CVE-2023-40660
    Third Party Advisory
  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2240912
    Issue Tracking
  • github.com https://github.com/OpenSC/OpenSC/issues/2792#issuecomment-1674806651
    Issue Tracking
  • github.com https://github.com/OpenSC/OpenSC/releases/tag/0.24.0-rc1
    Release Notes
  • github.com https://github.com/OpenSC/OpenSC/wiki/OpenSC-security-advisories
    Vendor Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2023/11/msg00024.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2024/12/msg00026.html
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3CPQOMCDWFRBMEFR5VK4N5MMXXU42ODE/
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GLYEFIBBA37TK3UNMZN5NOJ7IWCIXLQP/

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.