Vulnerability identifier: #VU62283

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-24812

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Grafana
Web applications / Other software

Vendor: Grafana Labs

Description

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

The vulnerability exists due to a design error related to caching of API keys and privilege management. When fine-grained access control is enabled and a client uses Grafana API Key to make requests, the permissions for that API Key are cached for 30 seconds for the given organization. Because of the way the cache ID is constructed, the consequent requests with any API Key evaluate to the same permissions as the previous requests.

As a result, if the first request is made with Admin permissions, and the second request with different API Key is made with Viewer permissions, the second request will get the cached permissions from the previous Admin request, resulting in privilege escalation.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Grafana: 8.4.0 - 8.4.5, 8.3.0 - 8.3.7, 8.2.0 - 8.2.7, 8.1.0 - 8.1.8

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External links
http://github.com/grafana/grafana/security/advisories/GHSA-82gq-xfg3-5j7v
http://grafana.com/docs/grafana/latest/release-notes/release-notes-8-4-6/
http://grafana.com/blog/2022/04/12/grafana-enterprise-8.4.6-released-with-high-severity-security-fix/
http://github.com/grafana/grafana/releases/tag/v8.4.6

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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.