CVE-2020-13143 : Security Advisory and Response

A vulnerability in the Linux kernel versions 3.16 through 5.6.13 could allow attackers to trigger an out-of-bounds read.

Understanding CVE-2020-13143

This CVE identifies a security issue in the Linux kernel that could be exploited by malicious actors.

What is CVE-2020-13143?

The vulnerability, known as gadget_dev_desc_UDC_store, exists in the Linux kernel's drivers/usb/gadget/configfs.c. It stems from the improper use of kstrdup, potentially leading to an out-of-bounds read.

The Impact of CVE-2020-13143

Exploiting this vulnerability could enable attackers to trigger an out-of-bounds read, opening the door to potential security breaches and unauthorized access.

Technical Details of CVE-2020-13143

This section delves into the technical aspects of the CVE.

Vulnerability Description

The flaw in gadget_dev_desc_UDC_store in drivers/usb/gadget/configfs.c allows attackers to exploit kstrdup, leading to an out-of-bounds read.

Affected Systems and Versions

Linux kernel versions 3.16 through 5.6.13

Exploitation Mechanism

Attackers can exploit the vulnerability by manipulating the kstrdup function without considering the presence of an internal '\0' value.

Mitigation and Prevention

Protecting systems from CVE-2020-13143 requires immediate action and long-term security measures.

Immediate Steps to Take

Apply patches provided by Linux distributions and vendors promptly
Monitor official security advisories for updates
Implement network segmentation to limit the impact of potential attacks

Long-Term Security Practices

Regularly update and patch systems to address known vulnerabilities
Conduct security audits and penetration testing to identify weaknesses
Educate users and IT staff on best security practices

Patching and Updates

Keep the Linux kernel up to date with the latest security patches
Follow vendor recommendations for securing Linux systems