Bug 1439520 (CVE-2017-7464)

Summary:	CVE-2017-7464 JBoss: JAXP in EAP 7.0 allows info disclosure via XXE
Product:	[Other] Security Response	Reporter:	Jason Shepherd <jshepherd>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	avibelli, bbaranow, belaran-do-not-use, bmaxwell, cdewolf, chazlett, csutherl, dandread, darran.lofthouse, dimitris, dosoudil, gsterlin, gzaronik, jawilson, jbalunas, jclere, jshepherd, lgao, mbabacek, myarboro, ngalvin, pgier, ppalaga, psakar, pslavice, psotirop, rmartinc, rnetuka, rpelisse, rrajasek, rsvoboda, security-response-team, tkirby, twalsh, vtunka, weli
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	It was found that the JAXP implementation used in EAP 7.0 for SAX and DOM parsing is vulnerable to certain XXE flaws. An attacker could use this flaw to cause DoS, SSRF, or information disclosure if they are able to provide XML content for parsing.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-07-12 13:04:28 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1439976

Description Jason Shepherd 2017-04-06 07:24:47 UTC

When parsing XML which does entity expansion the SAXParserFactory used in EAP 7.0.5 expands external entities, even when XMLConstants.FEATURE_SECURE_PROCESSING is set to true.

SAXParserFactory parserFactory = SAXParserFactory.newInstance();
parserFactory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);

Comment 9 Jason Shepherd 2017-04-20 00:48:10 UTC

Acknowledgments:

Name: Jason Shepherd (Red Hat)

Comment 11 Jason Shepherd 2017-05-11 06:36:10 UTC

Mitigation:

Enable the security features of the DocumentBuilderFactory or SaxParserFactory as described by OWASP:

https://www.owasp.org/index.php/XML_External_Entity_(XXE)_Prevention_Cheat_Sheet#JAXP_DocumentBuilderFactory.2C_SAXParserFactory_and_DOM4J

Comment 12 Jason Shepherd 2017-05-11 06:55:56 UTC

I found a workaround for this issue, which was to set:
parserFactory.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
I think we should close this one as WONTFIX. But perhaps we can raise a new issues to get the secure options set by default from EAP 7.1?

Comment 15 Product Security DevOps Team 2019-07-12 13:04:28 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2017-7464