CVE-2023-40661 Explained : Impact and Mitigation

OpenSC: multiple memory issues with pkcs15-init (enrollment tool)

Understanding CVE-2023-40661

Several memory vulnerabilities were identified within the OpenSC packages, particularly in the card enrollment process using pkcs15-init. The vulnerability requires physical access to the system to manipulate responses to APDUs.

What is CVE-2023-40661?

CVE-2023-40661 involves memory vulnerabilities in OpenSC, specifically in the card enrollment process using pkcs15-init.

The Impact of CVE-2023-40661

The vulnerability allows an attacker with physical access to manipulate responses to APDUs, potentially compromising key generation, certificate loading, and other card management operations during enrollment.

Technical Details of CVE-2023-40661

Vulnerability Description

The vulnerability in OpenSC allows attackers with physical access to exploit memory issues during card enrollment.

Affected Systems and Versions

OpenSC: Version 0.24.0-rc1 (unaffected)
Red Hat Enterprise Linux 8: Version 0:0.20.0-7.el8_9 (unaffected)
Red Hat Enterprise Linux 9: Version 0:0.23.0-3.el9_3 (unaffected)
Red Hat Enterprise Linux 7: Status unknown
Fedora: Affected

Exploitation Mechanism

To exploit this vulnerability, an attacker needs physical access to the computer system to use a custom-crafted USB device or smart card.

Mitigation and Prevention

Immediate Steps to Take

It is recommended to monitor vendor advisories and apply security patches promptly to mitigate the risk of exploitation.

Long-Term Security Practices

Regularly update software and implement physical security measures to restrict unauthorized access to computer systems.

Patching and Updates

Refer to the following for more details:

Red Hat Advisory RHSA-2023:7876
Red Hat Advisory RHSA-2023:7879