CyberRota Analysis
AI-GeneratedThe HAPI FHIR implementation in Java is vulnerable to denial of service due to improper handling of user-controlled regular expressions in FHIRPath functions, which can lead to catastrophic backtracking and CPU resource exhaustion. Organizations utilizing affected versions prior to 6.9.9 and 6.9.4.2 should prioritize upgrading to mitigate the risk of service disruption. This vulnerability poses a significant threat to healthcare interoperability systems relying on HAPI FHIR for processing FHIRPath expressions.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to 6.9.9 and 6.9.4.2, all implementations of FHIRPathEngine accept arbitrary FHIRPath expressions and evaluate them without input validation, and the FHIRPath functions matches(), matchesFull(), and replaceMatches() pass user-controlled regular expressions to Java's Pattern.compile() and String.replaceAll() through an incomplete timeout utility. An attacker can send a resource containing an evil regex pattern that causes catastrophic backtracking, exhausting CPU resources and causing denial of service in the FHIR Validator HTTP endpoint and affected org.hl7.fhir.* modules. This issue is fixed in versions 6.9.9 and 6.9.4.2.