CVE-2019-17053 : Security Advisory and Response

A vulnerability in the Linux kernel up to version 5.3.2 allows unprivileged users to create a raw socket, potentially leading to security risks.

Understanding CVE-2019-17053

This CVE identifies a flaw in the Linux kernel that impacts the creation of raw sockets by users without special privileges.

What is CVE-2019-17053?

The function ieee802154_create in the Linux kernel's network module AF_IEEE802154 up to version 5.3.2 does not properly enforce the capability CAP_NET_RAW. This oversight permits users lacking special privileges to create a raw socket, identified as CID-e69dbd4619e7.

The Impact of CVE-2019-17053

The vulnerability allows unauthorized users to create raw sockets, potentially leading to security breaches and unauthorized network access.

Technical Details of CVE-2019-17053

This section delves into the technical aspects of the CVE.

Vulnerability Description

The ieee802154_create function in the Linux kernel's AF_IEEE802154 network module through version 5.3.2 fails to enforce CAP_NET_RAW, enabling unprivileged users to create a raw socket, also known as CID-e69dbd4619e7.

Affected Systems and Versions

Linux kernel up to version 5.3.2

Exploitation Mechanism

Unauthorized users can exploit this vulnerability to create raw sockets, potentially compromising system security.

Mitigation and Prevention

Protecting systems from CVE-2019-17053 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply relevant security patches promptly
Monitor network activity for any suspicious behavior
Restrict user privileges to minimize the impact of unauthorized access

Long-Term Security Practices

Regularly update the Linux kernel to the latest version
Implement access controls and least privilege principles
Conduct security audits and penetration testing to identify vulnerabilities

Patching and Updates

Ensure timely installation of security updates and patches to mitigate the risk of unauthorized raw socket creation.