Bug 1624088 – CVE-2018-15727 grafana: authentication bypass knowing only a username of an LDAP or OAuth user

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Bug 1624088 - (CVE-2018-15727) CVE-2018-15727 grafana: authentication bypass knowing only a username of an LDAP or OAuth user

Summary:	CVE-2018-15727 grafana: authentication bypass knowing only a username of an ...

Status:	NEW

Aliases:	CVE-2018-15727

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
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Assigned To:	Red Hat Product Security
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URL:
Whiteboard:	impact=moderate,public=20180829,repor...
Keywords:	Security

Depends On:	1626399 1626400 1626401 1626866 1626867
Blocks:	1624089
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Reported:	2018-08-30 18:11 EDT by Laura Pardo
Modified:	2018-09-23 23:17 EDT (History)
CC List:	18 users (show)

See Also:
Fixed In Version:	grafana 5.2.3, grafana 4.6.4
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Description Laura Pardo 2018-08-30 18:11:09 EDT

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 07:11:04 EDT

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 02:22:37 EDT

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

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