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CVE-2021-22138

Date: May 13, 2021

In Logstash versions after 6.4.0 and before 6.8.15 and 7.12.0 a TLS certificate validation flaw was found in the monitoring feature. When specifying a trusted server CA certificate Logstash would not properly verify the certificate returned by the monitoring server. This could result in a man in the middle style attack against the Logstash monitoring data.

Language: Ruby

Severity Score

Related Resources (6)

https://security.archlinux.org/CVE-2021-22138
https://github.com/elastic/logstash/commit/2926f1e8c610034c1f2e4dfeda1bf4c2d3bbd979
https://discuss.elastic.co/t/elastic-stack-7-12-0-and-6-8-15-security-update/268125
https://nvd.nist.gov/vuln/detail/CVE-2021-22138
https://security.netapp.com/advisory/ntap-20210629-0001/
https://www.mend.io/vulnerability-database/CVE-2021-22138

Severity Score

Weakness Type (CWE)

Improper Certificate Validation

CWE-295

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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