CVE-2021-31409 : Exploit Details and Defense Strategies
Discover the impact of CVE-2021-31409, a high severity vulnerability in Vaadin framework's EmailValidator component. Learn about affected versions and mitigation steps.
A vulnerability labeled as CVE-2021-31409 was discovered in the Vaadin framework. This vulnerability allows attackers to exploit an unsafe validation regex in the EmailValidator component in versions 8.0.0 through 8.12.4 of the com.vaadin:vaadin-compatibility-server, leading to uncontrolled resource consumption.
Understanding CVE-2021-31409
This section will cover the specifics of CVE-2021-31409 vulnerability.
What is CVE-2021-31409?
The vulnerability involves an unsafe validation regex in the EmailValidator component within the Vaadin framework. Attackers can leverage this flaw to trigger uncontrolled resource consumption by submitting malicious email addresses.
The Impact of CVE-2021-31409
The impact of CVE-2021-31409 is considered high with a base severity score of 7.5. This flaw can be exploited over a network with low attack complexity, leading to high availability impact.
Technical Details of CVE-2021-31409
This section will delve into the technical aspects of CVE-2021-31409.
Vulnerability Description
The vulnerability arises due to unsafe validation regex in the EmailValidator component, specifically affecting versions 8.0.0 through 8.12.4 of the com.vaadin:vaadin-compatibility-server.
Affected Systems and Versions
The affected products include Vaadin and vaadin-compatibility-server versions 8.0.0 through 8.12.4.
Exploitation Mechanism
Attackers can cause uncontrolled resource consumption by exploiting the vulnerable EmailValidator component with malicious email addresses.
Mitigation and Prevention
Below are the steps to mitigate and prevent exploitation of CVE-2021-31409.
Immediate Steps to Take
Users are advised to apply the necessary security patches provided by Vaadin promptly. It is crucial to update to versions that address the vulnerability to prevent exploitation.
Long-Term Security Practices
Incorporate secure coding practices, regular security audits, and implement input validation mechanisms to safeguard against similar vulnerabilities in the future.
Patching and Updates
Regularly monitor security advisories from Vaadin and apply patches or updates as soon as they are released to ensure system security.