Privilege escalation in Grafana

Published: 2022-09-26 | Updated: 2022-10-20

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2022-36062 CVE-2022-35957
CWE-ID	CWE-264 CWE-288
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Grafana Web applications / Other software
Vendor	Grafana Labs

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU67646

Risk: Medium

CVSSv3.1: 5.6 [CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-36062

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote user to escalate privileges on the system.

The vulnerability exists due to application does not properly impose security restrictions, which leads to security restrictions bypass and privilege escalation.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Grafana: 8.5.0 - 9.1.5

External links

http://github.com/grafana/grafana/security/advisories/GHSA-p978-56hq-r492

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Authentication bypass using an alternate path or channel

EUVDB-ID: #VU68557

Risk: Low

CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-35957

CWE-ID: CWE-288 - Authentication Bypass Using an Alternate Path or Channel

Exploit availability: No

Description

The vulnerability allows a remote user to escalate privileges within the application.

The vulnerability exists due to the way Grafana handles authorization process when Auth proxy authentication is used. A remote user with admin privileges can authenticate as Server Admin by providing the username (or email) in a X-WEBAUTH-USER HTTP header.