CVE-2021-22097 : Vulnerability Insights and Analysis
Discover how CVE-2021-22097 affects Spring AMQP versions 2.2.X and 2.3.X, enabling attackers to exploit a deserialization flaw, causing 100% CPU usage. Learn about the impact and mitigation steps.
This article provides detailed information on CVE-2021-22097, a vulnerability found in Spring AMQP versions 2.2.0 to 2.2.18 and 2.3.0 to 2.3.10 that could lead to a Denial of Service (DoS) attack.
Understanding CVE-2021-22097
CVE-2021-22097 is a vulnerability in Spring AMQP that allows for a maliciously crafted java.util.Dictionary object to lead to 100% CPU usage when the toString() method is executed in certain message deserialization scenarios.
What is CVE-2021-22097?
In Spring AMQP versions 2.2.0 to 2.2.18 and 2.3.0 to 2.3.10, a flaw in the toString() method of the Spring AMQP Message object can be exploited by constructing a harmful java.util.Dictionary object.
The Impact of CVE-2021-22097
This vulnerability could be exploited by an attacker to cause excessive CPU consumption in the application, leading to a DoS condition that disrupts the normal operation of the system.
Technical Details of CVE-2021-22097
The following technical details outline the specifics of the CVE-2021-22097 vulnerability.
Vulnerability Description
The vulnerability arises due to improper handling of message deserialization in Spring AMQP, allowing a specially crafted java.util.Dictionary object to cause 100% CPU usage upon calling the toString() method.
Affected Systems and Versions
Affected systems include Spring AMQP versions 2.2.0 to 2.2.18 and 2.3.0 to 2.3.10. Users on these versions are vulnerable to exploitation if the outlined conditions are met.
Exploitation Mechanism
Exploitation of this vulnerability involves creating a malicious java.util.Dictionary object and triggering the toString() method of the Spring AMQP Message object with the appropriate content type.
Mitigation and Prevention
To mitigate the risks associated with CVE-2021-22097, the following steps are recommended.
Immediate Steps to Take
Users should update their affected Spring AMQP installations to versions 2.2.19 and 2.3.11 or later to patch the vulnerability and prevent potential exploitation.
Long-Term Security Practices
Implement secure coding practices, validate and sanitize all inputs, and conduct regular security audits to detect and address vulnerabilities proactively.
Patching and Updates
Regularly monitor official sources for security patches and updates related to Spring AMQP to stay informed about the latest security fixes and apply them promptly.