CVE-2020-26088 : Security Advisory and Response

A missing CAP_NET_RAW check in NFC socket creation in net/nfc/rawsock.c in the Linux kernel before 5.8.2 could be used by local attackers to create raw sockets, bypassing security mechanisms, aka CID-26896f01467a.

Understanding CVE-2020-26088

This CVE involves a vulnerability in the Linux kernel that could allow local attackers to create raw sockets.

What is CVE-2020-26088?

The vulnerability arises from a missing CAP_NET_RAW check in NFC socket creation in the Linux kernel before version 5.8.2, enabling local attackers to bypass security mechanisms by creating raw sockets.

The Impact of CVE-2020-26088

The vulnerability could be exploited by local attackers to create raw sockets, potentially leading to unauthorized network access and other security breaches.

Technical Details of CVE-2020-26088

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The vulnerability stems from a missing CAP_NET_RAW check in NFC socket creation in the Linux kernel prior to version 5.8.2, allowing local attackers to create raw sockets.

Affected Systems and Versions

Affected systems: Linux kernel versions before 5.8.2
Affected versions: Not applicable

Exploitation Mechanism

Local attackers can exploit this vulnerability to create raw sockets, circumventing security controls and potentially gaining unauthorized network access.

Mitigation and Prevention

Protecting systems from CVE-2020-26088 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches provided by the Linux kernel maintainers promptly.
Monitor for any signs of unauthorized network activity.
Implement least privilege access controls to limit potential attack surfaces.

Long-Term Security Practices

Regularly update the Linux kernel to the latest stable version to mitigate known vulnerabilities.
Conduct security assessments and penetration testing to identify and address potential weaknesses.

Patching and Updates

Ensure timely installation of security updates and patches released by the Linux kernel maintainers to address the vulnerability.