CVE-2019-15946 Explained : Impact and Mitigation

OpenSC before version 0.20.0-rc1 is affected by an unauthorized access issue in the function asn1_decode_entry, leading to an out-of-bounds access of an ASN.1 Octet string.

Understanding CVE-2019-15946

OpenSC vulnerability with unauthorized access to an ASN.1 Octet string.

What is CVE-2019-15946?

OpenSC version older than 0.20.0-rc1 has a security flaw in asn1_decode_entry function.

The Impact of CVE-2019-15946

Unauthorized access to an ASN.1 Octet string in OpenSC's libopensc/asn1.c file.

Technical Details of CVE-2019-15946

OpenSC vulnerability details.

Vulnerability Description

Out-of-bounds access of an ASN.1 Octet string in asn1_decode_entry function.

Affected Systems and Versions

OpenSC versions prior to 0.20.0-rc1.

Exploitation Mechanism

Attackers can exploit this vulnerability to gain unauthorized access to sensitive data.

Mitigation and Prevention

Protecting systems from CVE-2019-15946.

Immediate Steps to Take

Update OpenSC to version 0.20.0-rc1 or newer.
Monitor for any unauthorized access attempts.

Long-Term Security Practices

Regularly update software to the latest versions.
Implement access controls and monitoring mechanisms.
Conduct security audits and assessments.

Patching and Updates

Apply patches and security updates promptly to address known vulnerabilities.