CVE-2018-16420 : What You Need to Know

OpenSC before version 0.19.0-rc1 is vulnerable to multiple buffer overflows in the decrypt_response function when handling responses from an ePass 2003 Card. Attackers could exploit this to cause denial of service or other unknown damage.

Understanding CVE-2018-16420

In the libopensc/card-epass2003.c file in OpenSC version earlier than 0.19.0-rc1, there are multiple instances of buffer overflows occurring when processing responses from an ePass 2003 Card in the decrypt_response function.

What is CVE-2018-16420?

This CVE refers to several buffer overflows in OpenSC before version 0.19.0-rc1 that could be exploited by attackers providing specially crafted smartcards.

The Impact of CVE-2018-16420

The consequences of these buffer overflows could lead to a denial of service (application crash) or potentially cause other types of unknown damage.

Technical Details of CVE-2018-16420

OpenSC version earlier than 0.19.0-rc1 is affected by this vulnerability.

Vulnerability Description

The vulnerability lies in the decrypt_response function in the libopensc/card-epass2003.c file.

Affected Systems and Versions

Product: n/a
Vendor: n/a
Versions: n/a

Exploitation Mechanism

Attackers can exploit the buffer overflows by providing specially crafted smartcards.

Mitigation and Prevention

Immediate Steps to Take:

Update OpenSC to version 0.19.0-rc1 or later.
Monitor for any unusual activities on the system. Long-Term Security Practices:
Regularly update software and firmware to the latest versions.
Implement strong access controls and authentication mechanisms.
Conduct regular security assessments and penetration testing.
Stay informed about security advisories and patches.
Educate users on safe practices and awareness regarding smartcard usage.
Consider implementing intrusion detection and prevention systems.

Patching and Updates

Ensure OpenSC is updated to version 0.19.0-rc1 or later to mitigate the vulnerability.