CVE-2021-37847 : Vulnerability Insights and Analysis

This article provides an overview of CVE-2021-37847, highlighting its impact, technical details, and mitigation steps.

Understanding CVE-2021-37847

CVE-2021-37847 is a vulnerability found in Pengutronix barebox through version 2021.07.0 that leaks timing information during digest verification.

What is CVE-2021-37847?

crypto/digest.c in Pengutronix barebox through 2021.07.0 leaks timing information because memcmp is used during digest verification.

The Impact of CVE-2021-37847

The vulnerability can potentially leak sensitive timing information, leading to security risks and potential exploitation by malicious actors.

Technical Details of CVE-2021-37847

The technical details of CVE-2021-37847 include the vulnerability description, affected systems and versions, and exploitation mechanism.

Vulnerability Description

crypto/digest.c in Pengutronix barebox through 2021.07.0 leaks timing information because memcmp is used during digest verification.

Affected Systems and Versions

The vulnerability affects Pengutronix barebox versions up to 2021.07.0.

Exploitation Mechanism

The vulnerability can be exploited by leaking timing information during digest verification, which could be used maliciously to compromise system security.

Mitigation and Prevention

Understanding how to mitigate and prevent CVE-2021-37847 is crucial for safeguarding systems against potential attacks.

Immediate Steps to Take

Monitor official sources for patches
Apply vendor-released updates promptly
Implement network security measures to reduce exposure risks

Long-Term Security Practices

Regularly update and patch all software components
Conduct security assessments and audits
Implement access controls and encryption practices

Patching and Updates

Ensure that Pengutronix barebox is updated to the latest version (post 2021.07.0) to address the timing information leakage vulnerability.