CVE-2023-31421— Beats, Elastic Agent, APM Server, and Fleet Server Improper Certificate Validation issue
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I. Basic Information for CVE-2023-31421
Vulnerability Information
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Vulnerability Title
Beats, Elastic Agent, APM Server, and Fleet Server Improper Certificate Validation issue
Source: NVD (National Vulnerability Database)
Vulnerability Description
It was discovered that when acting as TLS clients, Beats, Elastic Agent, APM Server, and Fleet Server did not verify whether the server certificate is valid for the target IP address; however, certificate signature validation is still performed. More specifically, when the client is configured to connect to an IP address (instead of a hostname) it does not validate the server certificate's IP SAN values against that IP address and certificate validation fails, and therefore the connection is not blocked as expected.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
证书验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Elasticsearch 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Elasticsearch是一个基于Lucene库的搜索引擎。 Elasticsearch 存在安全漏洞，该漏洞源于 Beats、Elastic Agent、APM Server、Fleet Server作为TLS客户端时，不会验证服务器证书对于目标IP地址是否有效。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Elastic | Beats | 8.0.0, 8.9.2 | - | |
| Elastic | Elastic Agent | 8.0.0, 8.9.2 | - | |
| Elastic | APM Server | 8.0.0, 8.9.2 | - | |
| Elastic | Fleet Server | 8.0.0, 8.9.2 | - |
II. Public POCs for CVE-2023-31421
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Elastic · 2023-10-26 · 8 CVEs total
| CVE-2023-31422 | 9.0 CRITICAL | Kibana Insertion of Sensitive Information into Log File |
| CVE-2023-46667 | 8.1 HIGH | Fleet Server Insertion of Sensitive Information into Log File |
| CVE-2023-31418 | 7.5 HIGH | Elasticsearch uncontrolled resource consumption |
| CVE-2023-31419 | 6.5 MEDIUM | Elasticsearch StackOverflow vulnerability |
| CVE-2023-46666 | 5.3 MEDIUM | Elastic Sharepoint Online Python Connector Improper Access Control |
| CVE-2023-31416 | 5.3 MEDIUM | Elastic Cloud on Kubernetes (ECK) secret token configuration issue |
| CVE-2023-31417 | 4.1 MEDIUM | Elasticsearch Insertion of sensitive information in audit logs |
IV. Related Vulnerabilities
Same vendor: Elastic
- CVE-2026-33467
Improper Verification of Cryptographic Signature in Elastic - CVE-2026-33466
Improper Limitation of a Pathname to a Restricted Directory - CVE-2026-33458
Server-Side Request Forgery (SSRF) in Kibana One Workflow Le - CVE-2026-33459
Uncontrolled Resource Consumption in Kibana Leading to Denia - CVE-2026-33460
Incorrect Authorization in Kibana Fleet Leading to Informati
Same weakness: CWE-295
V. Comments for CVE-2023-31421
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