#VU51710 Security restrictions bypass in Elasticsearch - CVE-2021-22135

Vulnerability identifier: #VU51710

Vulnerability risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-22135

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Elasticsearch
Web applications / Other software

Vendor: Elastic Stack

Description

The vulnerability allows a remote user to gain access to sensitive information.

The vulnerability exists in the Elasticsearch suggester and profile API when Document and Field Level Security are enabled. A remote user can perform certain queries to enable the profiler and suggester on index and disclose existence of documents and fields.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Elasticsearch: 6.0.0 - 6.0.1, 6.1.0 - 6.1.4, 6.2.0 - 6.2.4, 6.3.0 - 6.3.2, 6.4.0 - 6.4.3, 6.5.0 - 6.5.4, 6.6.0 - 6.6.2, 6.7.0 - 6.7.2, 6.8.0 - 6.8.14, 7.0.0 beta1 - 7.0.1, 7.1.0 - 7.11.1, 7.2.0 - 7.2.1, 7.3.0 - 7.3.2, 7.4.0 - 7.4.2, 7.5.0 - 7.5.2, 7.6.0 - 7.6.2, 7.7.0 - 7.7.1, 7.8.0 - 7.8.1, 7.9.0 - 7.9.3

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External links
https://www.elastic.co/community/security#ESA-2021-06

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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.