CVE-2021-33609: Denial of Service in DataCommunicator class in Vaadin 8
Summary
CVE-2021-33609: Denial of service in DataCommunicator class in Vaadin 8. Affects com.vaadin:vaadin-server versions >= 8.0.6, < 8.14.1. Fixed in 8.14.1. How to fix ↓
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Background
Vaadin is an open-source Java framework used for building web applications. The com.vaadin:vaadin-server package, specifically versions 8.0.0 through 8.14.0 (Vaadin 8.0.0 through 8.14.0), is affected by a denial of service vulnerability. This vulnerability resides in the DataCommunicator class and can be exploited by an authenticated network attacker to cause heap exhaustion by requesting an excessive number of rows of data.
Vulnerability Detail
The vulnerability in the DataCommunicator class of the com.vaadin:vaadin-server package allows an authenticated network attacker to exhaust the heap memory by requesting an excessive number of rows of data. This can lead to a denial of service condition, impacting the availability of the affected application. The vulnerability has a CVSS score of 4.3, indicating a moderate severity level.
How To Fix
Minimum fixed version
8.14.1
This is the first release that contains the fix.
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Workaround
There is no known workaround for this vulnerability. It is essential to apply the fix by upgrading to a patched version of the com.vaadin:vaadin-server package.
Conclusion
The com.vaadin:vaadin-server package in versions 8.0.0 through 8.14.0 (Vaadin 8.0.0 through 8.14.0) is vulnerable to a denial of service attack due to a flaw in the DataCommunicator class. To mitigate this vulnerability, it is crucial to upgrade to version 8.14.1 or later of the package. For further assistance or support in vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability allows an authenticated network attacker to cause heap exhaustion, leading to a denial of service condition in the affected application.
Applications that use the com.vaadin:vaadin-server package in versions 8.0.0 through 8.14.0 (Vaadin 8.0.0 through 8.14.0) are affected by this vulnerability.
Yes, an authenticated network attacker is required to exploit this vulnerability.
The CVSS score of this vulnerability is 4.3, indicating a moderate severity level.
No, there are no known workarounds for this vulnerability. It is necessary to upgrade to a patched version of the com.vaadin:vaadin-server package.
References
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