7.5
HIGH
CVE-2023-31421
Elastic Vulnerability: Insecure Server Certificate Validation in Beats, Elastic Agent, APM Server, and Fleet Server
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.

INFO

Published Date :

Oct. 26, 2023, 4:15 a.m.

Last Modified :

Nov. 21, 2024, 8:01 a.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2023-31421 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Elastic elastic_beats
2 Elastic elastic_agent
3 Elastic fleet_server
4 Elastic elastic_fleet_server
5 Elastic apm_server
: Total Affected Vendor : 1 | Products : 5
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2023-31421.

URL Resource
https://discuss.elastic.co/t/beats-elastic-agent-apm-server-and-fleet-server-8-10-1-security-update-improper-certificate-validation-issue-esa-2023-16/343385 Vendor Advisory
https://www.elastic.co/community/security Vendor Advisory
https://discuss.elastic.co/t/beats-elastic-agent-apm-server-and-fleet-server-8-10-1-security-update-improper-certificate-validation-issue-esa-2023-16/343385 Vendor Advisory
https://www.elastic.co/community/security Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2023-31421 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2023-31421 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://discuss.elastic.co/t/beats-elastic-agent-apm-server-and-fleet-server-8-10-1-security-update-improper-certificate-validation-issue-esa-2023-16/343385
    Added Reference https://www.elastic.co/community/security
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Nov. 08, 2023

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    Changed Reference Type https://discuss.elastic.co/t/beats-elastic-agent-apm-server-and-fleet-server-8-10-1-security-update-improper-certificate-validation-issue-esa-2023-16/343385 No Types Assigned https://discuss.elastic.co/t/beats-elastic-agent-apm-server-and-fleet-server-8-10-1-security-update-improper-certificate-validation-issue-esa-2023-16/343385 Vendor Advisory
    Changed Reference Type https://www.elastic.co/community/security No Types Assigned https://www.elastic.co/community/security Vendor Advisory
    Added CWE NIST CWE-295
    Added CPE Configuration OR *cpe:2.3:a:elastic:elastic_beats:*:*:*:*:*:*:*:* versions from (including) 8.0.0 up to (including) 8.9.2
    Added CPE Configuration OR *cpe:2.3:a:elastic:elastic_agent:*:*:*:*:*:*:*:* versions from (including) 8.0.0 up to (including) 8.9.2
    Added CPE Configuration OR *cpe:2.3:a:elastic:elastic_apm_server:*:*:*:*:*:*:*:* versions from (including) 8.0.0 up to (including) 8.9.2
    Added CPE Configuration OR *cpe:2.3:a:elastic:elastic_fleet_server:*:*:*:*:*:*:*:* versions from (including) 8.0.0 up to (including) 8.9.2
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2023-31421 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2023-31421 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.10 }} 0.01%

score

0.41937

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
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