Vulnerability identifier: #VU52691

Vulnerability risk: Medium

CVSSv3.1: 5 [CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-22139

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Kibana
Web applications / Other software

Vendor: Elastic Stack

Description

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

The vulnerability exists due to a lack of timeout or a limit on the request size. A remote authenticated attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Kibana: 7.12.0, 6.8.0 - 6.8.15, 7.11.0 - 7.11.2, 7.10.0 - 7.10.2, 7.9.0 - 7.9.3, 7.8.0 - 7.8.1, 7.7.0 - 7.7.1, 7.6.0 - 7.6.2, 7.5.0 - 7.5.2, 7.4.0 - 7.4.2, 7.3.0 - 7.3.2, 7.2.0 - 7.2.1, 7.1.0 - 7.1.1, 7.0.0 - 7.0.1, 6.7.0 - 6.7.2, 4.3 - 4.3.3, 4.2 - 4.2.2, 4.1 - 4.1.11, 4.0 - 4.0.3, 3.1.0 - 3.1.3, 3.0.0 - 3.0.1, 6.6.0 - 6.6.2, 6.5.0 - 6.5.4, 5.6.0 - 5.6.16, 4.6 - 4.6.6, 4.5 - 4.5.4, 4.4 - 4.4.2, 5.0.0 - 5.0.2, 5.1.0 - 5.1.2, 5.2.0 - 5.2.2, 5.3.0 - 5.3.3, 5.4.0 - 5.4.3, 5.5.0 - 5.5.3, 6.4.0 - 6.4.3, 6.3.0 - 6.3.2, 6.2.0 - 6.2.4, 6.1.0 - 6.1.4, 6.0.0 - 6.0.1

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External links
http://www.elastic.co/community/security#ESA-2021-10

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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.