Bug 1692898 (CVE-2019-3847)

Summary:	CVE-2019-3847 moodle: "Log in as" functionality exposed to JavaScript risk on other users' Dashboards
Product:	[Other] Security Response	Reporter:	Laura Pardo <lpardo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	gwync, igor.raits, sergio
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	moodle 3.6.3, moodle 3.5.5, moodle 3.4.8, moodle 3.1.17	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-10 10:52:03 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:	1692899, 1692900
Bug Blocks:

Description Laura Pardo 2019-03-26 16:30:14 UTC

A vulnerability was found in moodle before versions 3.6.3, 3.5.5, 3.4.8 and 3.1.17. Users with the "login as other users" capability (such as administrators/managers) can access other users' Dashboards, but the JavaScript those other users may have added to their Dashboard was not being escaped when being viewed by the user logging in on their behalf.


Upstream Bug:
https://tracker.moodle.org/browse/MDL-63786

Upstream Patch:
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-63786

Comment 1 Laura Pardo 2019-03-26 16:30:17 UTC

Acknowledgments:

Name: Daniel Thatcher

Comment 2 Laura Pardo 2019-03-26 16:30:25 UTC

External References:

https://moodle.org/mod/forum/discuss.php?d=384010#p1547742

Comment 3 Laura Pardo 2019-03-26 16:30:43 UTC

Created moodle tracking bugs for this issue:

Affects: epel-all [bug 1692900]
Affects: fedora-all [bug 1692899]

Comment 4 Product Security DevOps Team 2019-06-10 10:52:03 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.