SB2025121524 - Multiple vulnerabilities in Elasticsearch

Description

This security bulletin contains information about 2 vulnerabilities.

1) Improper authentication (CVE-ID: CVE-2025-37731)

CWE-ID: CWE-287 - Improper Authentication

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

The vulnerability allows a remote user to bypass authentication process.

The vulnerability exists due to an error in Elasticsearch PKI realm when handling client certificates. A remote user can use a specially crafted certificate to impersonate other application users. 

2) Resource exhaustion (CVE-ID: CVE-2025-68390)

CWE-ID: CWE-400 - Resource exhaustion

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

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

The vulnerability exists due to application does not properly control consumption of internal resources when restoring snapshot data. A remote user with snapshot restore privileges can trigger memory exhaustion and perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://discuss.elastic.co/t/elasticsearch-8-19-8-9-1-8-and-9-2-2-security-update-esa-2025-27/384063
• https://discuss.elastic.co/t/elasticsearch-8-19-8-9-1-8-and-9-2-2-security-update-esa-2025-37/384185