CVE-2019-19479 : Exploit Details and Defense Strategies

OpenSC versions 0.19.0 and 0.20.x through 0.20.0-rc3 are affected by a vulnerability in the libopensc component. The issue arises from an incorrect read operation in the card-setcos.c file when parsing a SETCOS file attribute.

Understanding CVE-2019-19479

This CVE identifies a security flaw in OpenSC versions that could potentially lead to exploitation by malicious actors.

What is CVE-2019-19479?

CVE-2019-19479 is a vulnerability found in OpenSC versions 0.19.0 and 0.20.x to 0.20.0-rc3, specifically in the libopensc component. The flaw occurs due to an erroneous read operation during the parsing of a SETCOS file attribute.

The Impact of CVE-2019-19479

The vulnerability could be exploited by attackers to execute arbitrary code or cause a denial of service (DoS) condition on systems running the affected OpenSC versions.

Technical Details of CVE-2019-19479

OpenSC CVE-2019-19479 requires a detailed understanding of the vulnerability and its implications.

Vulnerability Description

The issue in OpenSC versions 0.19.0 and 0.20.x through 0.20.0-rc3 stems from an incorrect read operation in the card-setcos.c file while processing a SETCOS file attribute.

Affected Systems and Versions

OpenSC versions 0.19.0 and 0.20.x to 0.20.0-rc3

Exploitation Mechanism

The vulnerability allows threat actors to perform unauthorized read operations, potentially leading to the execution of malicious code or causing system instability.

Mitigation and Prevention

Protecting systems from CVE-2019-19479 requires immediate actions and long-term security measures.

Immediate Steps to Take

Update OpenSC to a patched version that addresses the vulnerability.
Monitor for any unusual activities on the system that could indicate exploitation.

Long-Term Security Practices

Regularly update software and firmware to mitigate known vulnerabilities.
Implement access controls and network segmentation to limit the impact of potential attacks.

Patching and Updates

Apply security patches provided by OpenSC promptly to safeguard systems against CVE-2019-19479.