The HL7 FHIR Core Artifacts repository provides the java core object handling code, with utilities (including validator), for the Fast Healthcare Interoperability Resources (FHIR) specification. Prior to version 6.3.23, XSLT transforms performed by various components are vulnerable to XML external entity injections. A processed XML file with a malicious DTD tag could produce XML containing data from the host system. This impacts use cases where org.hl7.fhir.core is being used to within a host where external clients can submit XML. This issue has been patched in release 6.3.23. No known workarounds are available.

Impact XSLT transforms performed by various components are vulnerable to XML external entity injections. A processed XML file with a malicious DTD tag ( ]> could produce XML containing data from the host system. This impacts use cases where org.hl7.fhir.publisher is being used to within a host where external clients can submit XML.

A previous release provided an incomplete solution revealed by new testing.

Patches This issue has been patched as of version 1.7.4

Workarounds None

References Previous Advisory for Incomplete solution MITRE CWE OWASP XML External Entity Prevention Cheat Sheet

HL7 (Health Level 7) FHIR Core Libraries before 5.6.92 allow attackers to extract files into arbitrary directories via directory traversal from a crafted ZIP or TGZ archive (for a prepackaged terminology cache, NPM package, or comparison archive).

Impact In CI contexts, the IG Publisher CLI uses git commands to determine the URL of the originating repo. If the repo was cloned, or otherwise set to use a repo that uses a username and credential based URL, the entire URL will be included in the built Implementation Guide, exposing username and credential. This does not impact users that clone public repos without credentials, such as those using the auto-ig-build continuous integration infrastructure.

Patches This problem has been patched in release 1.8.9

Workarounds Users should update to 1.8.9 or the latest release

OR

Users should ensure the IG repo they are publishing does not have username or credentials included in the origin URL. Running the command git remote origin url should return a URL that contains no username, password, or token.

OR

Users should run the IG Publisher CLI with the -repo parameter and specify a URL that contains no username, password, or token.

CDA.xsl in HL7 C-CDA 1.1 and earlier does not anticipate the possibility of invalid C-CDA documents with crafted XML attributes, which allows remote attackers to conduct XSS attacks via a document containing a table that is improperly handled during unrestricted xsl:copy operations.

CDA.xsl in HL7 C-CDA 1.1 and earlier allows remote attackers to discover potentially sensitive URLs via a crafted reference element that triggers creation of an IMG element with an arbitrary URL in its SRC attribute, leading to information disclosure in a Referer log.

Cross-site scripting (XSS) vulnerability in CDA.xsl in HL7 C-CDA 1.1 and earlier allows remote attackers to inject arbitrary web script or HTML via a crafted reference element within a nonXMLBody element.