CVE-2021-32053 : Security Advisory and Response

JPA Server in HAPI FHIR before 5.4.0 allows a user to deny service via history requests due to a SELECT COUNT statement. This vulnerability can lead to a significant consumption of server resources.

Understanding CVE-2021-32053

This CVE impacts HAPI FHIR versions prior to 5.4.0, allowing attackers to disrupt service availability through history requests.

What is CVE-2021-32053?

CVE-2021-32053 affects JPA Server in HAPI FHIR, enabling malicious users to deny service by triggering resource-intensive database queries.

The Impact of CVE-2021-32053

Exploitation of this vulnerability can result in a high consumption of server resources, potentially leading to denial of service.

Technical Details of CVE-2021-32053

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The flaw in JPA Server in HAPI FHIR before 5.4.0 allows an attacker to overload the server by triggering a SELECT COUNT statement that necessitates a full index scan.

Affected Systems and Versions

HAPI FHIR versions earlier than 5.4.0 are vulnerable to this denial-of-service attack via history requests.

Exploitation Mechanism

By sending multiple simultaneous history requests, an attacker can exhaust server resources, leading to service disruption.

Mitigation and Prevention

To secure systems against CVE-2021-32053, certain measures need to be implemented.

Immediate Steps to Take

Users should update HAPI FHIR to version 5.4.0 or later to mitigate the vulnerability and prevent denial-of-service attacks.

Long-Term Security Practices

Implementing access controls, monitoring database queries, and limiting history request access can enhance security posture.

Patching and Updates

Regularly applying security patches and staying current with software updates is crucial to prevent exploitation of known vulnerabilities.