CVE-2021-34801 Explained : Impact and Mitigation

Valine 1.4.14 is vulnerable to a denial of service (DoS) attack, allowing remote attackers to disrupt the application by providing a User-Agent (UA) value that only specifies the product and version.

Understanding CVE-2021-34801

This section will cover the details related to CVE-2021-34801.

What is CVE-2021-34801?

CVE-2021-34801 is a vulnerability in Valine 1.4.14 that enables attackers to trigger a denial of service condition by supplying a specific User-Agent value.

The Impact of CVE-2021-34801

The impact of this vulnerability includes potential application outages and service disruption for users of Valine 1.4.14.

Technical Details of CVE-2021-34801

Below are the technical aspects of CVE-2021-34801.

Vulnerability Description

The vulnerability lies in how Valine 1.4.14 processes User-Agent values, allowing malicious actors to exploit this weakness for a DoS attack.

Affected Systems and Versions

Valine 1.4.14 is confirmed to be affected by this vulnerability. Other versions may also be at risk.

Exploitation Mechanism

By supplying a crafted User-Agent value that only specifies the product and version, attackers can trigger the DoS condition.

Mitigation and Prevention

To address CVE-2021-34801, consider the following mitigation strategies.

Immediate Steps to Take

Update Valine to a patched version that addresses this vulnerability.
Implement network security measures to filter out potentially malicious User-Agent values.

Long-Term Security Practices

Regularly monitor for security updates and patches for Valine.
Educate users on safe browsing practices to minimize the impact of DoS attacks.

Patching and Updates

Stay informed about security advisories from Valine developers and promptly apply any relevant patches to safeguard against CVE-2021-34801.