Denial of Service (DoS) Affecting com.vaadin:vaadin-server Open this link in a new tab package, versions [7.0.0,7.7.22)
Do your applications use this vulnerable package?
21 Apr 2021
19 Apr 2021
How to fix?
com.vaadin:vaadin-server to version 7.7.22 or higher.
com.vaadin:vaadin-server is a Java framework for modern Java web applications.
Affected versions of this package are vulnerable to Denial of Service (DoS). Unsafe validation RegEx in
EmailValidator class allows attackers to cause uncontrolled resource consumption by submitting malicious email addresses.
Denial of Service (DoS) describes a family of attacks, all aimed at making a system inaccessible to its intended and legitimate users.
Unlike other vulnerabilities, DoS attacks usually do not aim at breaching security. Rather, they are focused on making websites and services unavailable to genuine users resulting in downtime.
One popular Denial of Service vulnerability is DDoS (a Distributed Denial of Service), an attack that attempts to clog network pipes to the system by generating a large volume of traffic from many machines.
When it comes to open source libraries, DoS vulnerabilities allow attackers to trigger such a crash or crippling of the service by using a flaw either in the application code or from the use of open source libraries.
Two common types of DoS vulnerabilities:
High CPU/Memory Consumption- An attacker sending crafted requests that could cause the system to take a disproportionate amount of time to process. For example, commons-fileupload:commons-fileupload.
Crash - An attacker sending crafted requests that could cause the system to crash. For Example, npm