Bug 1624088 (CVE-2018-15727)

Summary:	CVE-2018-15727 grafana: authentication bypass knowing only a username of an LDAP or OAuth user
Product:	[Other] Security Response	Reporter:	Laura Pardo <lpardo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	apevec, chrisw, jjoyce, jschluet, kbasil, lhh, lpeer, markmc, mburns, mmagr, rbryant, sclewis, sisharma, slinaber, ssaha, tdecacqu, vbellur
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	grafana 5.2.3, grafana 4.6.4	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-10 10:37:05 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:	1626399, 1626400, 1626401, 1626866, 1626867
Bug Blocks:	1624089

Description Laura Pardo 2018-08-30 22:11:09 UTC

A flaw was found in Grafana 2.x, 3.x, and 4.x before 4.6.4 and 5.x before 5.2.3 allows authentication bypass because an attacker can generate a valid "remember me" cookie knowing only a username of an LDAP or OAuth user.


References:
https://grafana.com/blog/2018/08/29/grafana-5.2.3-and-4.6.4-released-with-important-security-fix/

Comment 1 Siddharth Sharma 2018-08-31 11:11:04 UTC

Reading code following seem to be fixes for this

For 5.2.x: https://github.com/grafana/grafana/commit/df83bf10a225811927644bdf6265fa80bdea9137
For 4.6.x: https://github.com/grafana/grafana/commit/7baecf0d0deae0d865e45cf03e082bc0db3f28c3

Comment 4 Siddharth Sharma 2018-09-07 06:22:37 UTC

Mitigation:

As per upstream (https://grafana.com/blog/2018/08/29/grafana-5.2.3-and-4.6.4-released-with-important-security-fix)

* Switch to authentication mechanism other than LDAP or OAuth
* Grafana should be isolated from public networks

Comment 9 errata-xmlrpc 2018-12-17 17:06:21 UTC

This issue has been addressed in the following products:

  Red Hat Gluster Storage 3.4 for RHEL 7

Via RHSA-2018:3829 https://access.redhat.com/errata/RHSA-2018:3829

Comment 10 errata-xmlrpc 2019-01-03 17:44:51 UTC

This issue has been addressed in the following products:

  Red Hat Ceph Storage 3.2

Via RHSA-2019:0019 https://access.redhat.com/errata/RHSA-2019:0019