CVE-2023-40660
A flaw was found in OpenSC packages that allow a potential PIN bypass.
Does this matter?
Lower severity and a low EPSS score (0.92%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 6.6 MEDIUMCVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 0.92% probability · 58th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-287
- Affected
- opensc project/opensc · redhat/enterprise linux
- Source
- secalert@redhat.com
References
- https://access.redhat.com/errata/RHSA-2023:7876
- https://access.redhat.com/errata/RHSA-2023:7879
- https://access.redhat.com/security/cve/CVE-2023-40660Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2240912Issue Tracking
- https://github.com/OpenSC/OpenSC/issues/2792#issuecomment-1674806651Issue Tracking
- https://github.com/OpenSC/OpenSC/releases/tag/0.24.0-rc1Release Notes
- https://github.com/OpenSC/OpenSC/wiki/OpenSC-security-advisoriesVendor Advisory
- http://www.openwall.com/lists/oss-security/2023/12/13/2
- https://access.redhat.com/errata/RHSA-2023:7876
- https://access.redhat.com/errata/RHSA-2023:7879
- https://access.redhat.com/security/cve/CVE-2023-40660Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2240912Issue Tracking
- https://github.com/OpenSC/OpenSC/issues/2792#issuecomment-1674806651Issue Tracking
- https://github.com/OpenSC/OpenSC/releases/tag/0.24.0-rc1Release Notes
- https://github.com/OpenSC/OpenSC/wiki/OpenSC-security-advisoriesVendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/11/msg00024.html
- https://lists.debian.org/debian-lts-announce/2024/12/msg00026.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/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.