It was found that the Red Hat JBoss EAP 7.0.5 implementation of javax.xml.transform.TransformerFactory is vulnerable to XXE. An attacker could use this flaw to launch DoS or SSRF attacks, or read files from the server where EAP is deployed.
Find out more about CVE-2017-7503 from the MITRE CVE dictionary dictionary and NIST NVD.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
| CVSS3 Base Score | 7.5 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:H |
| Attack Vector | Network |
| Attack Complexity | High |
| Privileges Required | None |
| User Interaction | None |
| Scope | Changed |
| Confidentiality | Low |
| Integrity Impact | None |
| Availability Impact | High |
| Platform | Package | State |
|---|---|---|
| Red Hat JBoss EAP 7 | XML Frameworks | Fix deferred |
This issue affects processing of XML content from an untrusted source using a javax.xml.transform.TransformerFactory. The only safe way to process untrusted XML content with a TransformerFactory is to use the StAX API. StAX is a safe implementation on EAP 7.0.x because the XML content is not read in it's entirety in order to parse it. As a developer using StAX, you decide which XML stream events you want to react to, so XXE control constructs won't be processed automatically by the parser.
Vulmon