JWT token disclosure in Grafana

1) Information disclosure

EUVDB-ID: #VU77620

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-1387

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to application allows users to login with a JWT token passed in the URL query parameter auth_token. A remote attacker can intercept the query and gain unauthorized access to the application.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Grafana: 9.1.0 - 9.4.7

CPE2.3

• cpe:2.3:a:grafana_labs:grafana:9.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:grafana_labs:grafana:9.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:grafana_labs:grafana:9.1.2:*:*:*:*:*:*:*
• cpe:2.3:a:grafana_labs:grafana:9.1.3:*:*:*:*:*:*:*
• cpe:2.3:a:grafana_labs:grafana:9.1.4:*:*:*:*:*:*:*
• cpe:2.3:a:grafana_labs:grafana:9.1.5:*:*:*:*:*:*:*
• cpe:2.3:a:grafana_labs:grafana:9.1.6:*:*:*:*:*:*:*
• cpe:2.3:a:grafana_labs:grafana:9.1.7:*:*:*:*:*:*:*
• cpe:2.3:a:grafana_labs:grafana:9.1.8:*:*:*:*:*:*:*
• cpe:2.3:a:grafana_labs:grafana:9.2.0:*:*:*:*:*:*:*

External links

https://grafana.com/security/security-advisories/cve-2023-1387/
https://github.com/grafana/bugbounty/security/advisories/GHSA-5585-m9r5-p86j

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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