#VU64406 Resource exhaustion in Grafana - CVE-2021-27358

Vulnerability identifier: #VU64406

Vulnerability risk: Medium

CVSSv4.0: 7.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2021-27358

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Grafana
Web applications / Other software

Vendor: Grafana Labs

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources in Grafana when anonymous access is enabled. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack via a remote API call.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Grafana: 6.7.3 - 6.7.6, 7.0.0 - 7.0.6, 7.1.0 - 7.1.5, 7.2.0 - 7.2.3, 7.3.0 - 7.3.10, 7.4.0 - 7.4.1

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External links
https://grafana.com/docs/grafana/latest/release-notes/release-notes-7-4-2/
https://github.com/grafana/grafana/blob/master/CHANGELOG.md
https://github.com/grafana/grafana/blob/master/CHANGELOG.md#742-2021-02-17
https://security.netapp.com/advisory/ntap-20210513-0007/
https://bugzilla.redhat.com/show_bug.cgi?id=1941024

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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. However, proof of concept for this vulnerability is available.