CVE-2020-36426 Explained : Impact and Mitigation

An issue was discovered in Arm Mbed TLS before 2.24.0. mbedtls_x509_crl_parse_der has a buffer over-read (of one byte).

Understanding CVE-2020-36426

This CVE identifies a specific vulnerability in Arm Mbed TLS that could potentially lead to security issues.

What is CVE-2020-36426?

CVE-2020-36426 points out a buffer over-read flaw in mbedtls_x509_crl_parse_der in versions prior to 2.24.0.

The Impact of CVE-2020-36426

The vulnerability could be exploited by attackers to cause a denial of service or potentially execute arbitrary code.

Technical Details of CVE-2020-36426

Arm Mbed TLS versions before 2.24.0 are affected by this security issue.

Vulnerability Description

mbedtls_x509_crl_parse_der suffers from a buffer over-read by one byte.

Affected Systems and Versions

Vendor: n/a
Product: n/a
Versions: All versions before 2.24.0 are affected.

Exploitation Mechanism

Attackers could exploit this vulnerability to trigger a denial of service or execute arbitrary code by leveraging the buffer over-read flaw.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent potential exploitation of this vulnerability.

Immediate Steps to Take

Update Arm Mbed TLS to version 2.24.0 or later.
Monitor for any unusual activities on the network.

Long-Term Security Practices

Regularly update software and firmware to the latest versions.
Conduct security assessments and audits to identify and address vulnerabilities.

Patching and Updates

Apply patches and updates provided by Arm Mbed TLS to ensure the security of the system.