Elastic Beats/Agent/APM Server/Fleet Server 8.0.0/8.9.2 TLS certificate validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.1$0-$5k0.00

Summaryinfo

A vulnerability was found in Elastic Beats, Agent, APM Server and Fleet Server 8.0.0/8.9.2. It has been rated as critical. The affected element is an unknown function of the component TLS Handler. Performing a manipulation results in certificate validation. This vulnerability is cataloged as CVE-2023-31421. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, was found in Elastic Beats, Agent, APM Server and Fleet Server 8.0.0/8.9.2. This affects an unknown function of the component TLS Handler. The manipulation with an unknown input leads to a certificate validation vulnerability. CWE is classifying the issue as CWE-295. The product does not validate, or incorrectly validates, a certificate. This is going to have an impact on confidentiality, and availability. The summary by CVE is:

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.

The weakness was shared 10/26/2023. It is possible to read the advisory at discuss.elastic.co. This vulnerability is uniquely identified as CVE-2023-31421 since 04/27/2023. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1587.003 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.1
VulDB Meta Temp Score: 6.1

VulDB Base Score: 4.8
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 5.9
CNA Vector (Elastic): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Certificate validation
CWE: CWE-295 / CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/27/2023 🔍
10/26/2023 +182 days 🔍
10/26/2023 +0 days 🔍
11/18/2023 +23 days 🔍

Sourcesinfo

Advisory: discuss.elastic.co
Status: Confirmed

CVE: CVE-2023-31421 (🔍)
GCVE (CVE): GCVE-0-2023-31421
GCVE (VulDB): GCVE-100-243579

Entryinfo

Created: 10/26/2023 06:57
Updated: 11/18/2023 09:03
Changes: 10/26/2023 06:57 (48), 11/18/2023 09:03 (11)
Complete: 🔍
Cache ID: 216::103

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