CVE-2021-30468 : Security Advisory and Response

A denial of service vulnerability in Apache CXF via JsonMapObjectReaderWriter allows an attacker to send malformed JSON, causing CPU consumption. Systems running Apache CXF versions prior to 3.4.4 and 3.3.11 are affected.

Understanding CVE-2021-30468

This section provides insight into the impact and technical details of the CVE.

What is CVE-2021-30468?

CVE-2021-30468 is a denial of service vulnerability in Apache CXF, enabling bad actors to exploit the JsonMapObjectReaderWriter, leading to CPU exhaustion.

The Impact of CVE-2021-30468

The vulnerability allows attackers to submit malformed JSON, triggering an infinite loop that consumes CPU indefinitely, affecting system performance.

Technical Details of CVE-2021-30468

Explore the specifics of the vulnerability to understand its implications better.

Vulnerability Description

The JsonMapObjectReaderWriter in Apache CXF can be exploited by attackers sending malformed JSON, causing threads to get stuck.

Affected Systems and Versions

Apache CXF versions prior to 3.4.4 and 3.3.11 are susceptible to this denial of service vulnerability.

Exploitation Mechanism

Attackers can submit specially crafted JSON to a web service using Apache CXF, resulting in the thread getting stuck in an infinite loop.

Mitigation and Prevention

Discover the steps to mitigate the risk and secure systems against CVE-2021-30468.

Immediate Steps to Take

Update Apache CXF to versions 3.4.4 or above to prevent exploitation of this vulnerability. Monitor system performance for any signs of CPU consumption.

Long-Term Security Practices

Implement secure coding practices and regular security audits to identify and address vulnerabilities promptly.

Patching and Updates

Stay informed about security advisories and patches released by Apache CXF to address vulnerabilities and maintain system security.