Privilege escalation in Elasticsearch

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU26521

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-7009

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

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

The vulnerability exists due to improper permissions issue. A remote attacker who is able to generate an API key can perform a series of steps that result in an API key being generated with elevated privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Elasticsearch: 6.7.0 - 7.6.1

CPE2.3

• cpe:2.3:a:elastic_stack:elasticsearch:6.7.2:*:*:*:*:*:*:*
• cpe:2.3:a:elastic_stack:elasticsearch:6.8.7:*:*:*:*:*:*:*
• cpe:2.3:a:elastic_stack:elasticsearch:7.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:elastic_stack:elasticsearch:7.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:elastic_stack:elasticsearch:7.2.1:*:*:*:*:*:*:*
• cpe:2.3:a:elastic_stack:elasticsearch:7.3.2:*:*:*:*:*:*:*
• cpe:2.3:a:elastic_stack:elasticsearch:7.4.2:*:*:*:*:*:*:*
• cpe:2.3:a:elastic_stack:elasticsearch:7.5.2:*:*:*:*:*:*:*
• cpe:2.3:a:elastic_stack:elasticsearch:7.6.1:*:*:*:*:*:*:*

External links

https://discuss.elastic.co/t/elastic-stack-6-8-8-and-7-6-2-security-update/225920
https://www.elastic.co/community/security/

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.