What is CVE-2021-22138?

CVE-2021-22138 is a TLS certificate validation flaw found in Logstash versions after 6.4.0 and before 6.8.15 and 7.12.0 that could result in a man-in-the-middle attack.

How does CVE-2021-22138 affect Logstash?

CVE-2021-22138 affects Logstash by allowing an attacker to perform a man-in-the-middle attack due to a TLS certificate validation flaw in the monitoring feature.

What is the severity of CVE-2021-22138?

CVE-2021-22138 has a severity rating of medium with a value of 3.7.

How can I fix CVE-2021-22138 in Logstash?

To fix CVE-2021-22138 in Logstash, update to version 6.8.15 or above for Logstash 6.x and version 7.12.0 or above for Logstash 7.x.

Where can I find more information about CVE-2021-22138?

You can find more information about CVE-2021-22138 in the following references: [Link 1](https://discuss.elastic.co/t/elastic-stack-7-12-0-and-6-8-15-security-update/268125), [Link 2](https://security.netapp.com/advisory/ntap-20210629-0001/).

Vulnerability/
CVE-2021-22138

medium

4.3

CWE

295

13/5/2021

3/8/2024

CVE-2021-22138

First published: Thu May 13 2021(Updated: )

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.

Credit: bressers@elastic.co

Affected Software	Affected Version	How to fix
Elastic Logstash	>=6.4.0<6.8.15
Elastic Logstash	>=7.0.0<7.12.0

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Frequently Asked Questions

What is CVE-2021-22138?
CVE-2021-22138 is a TLS certificate validation flaw found in Logstash versions after 6.4.0 and before 6.8.15 and 7.12.0 that could result in a man-in-the-middle attack.
How does CVE-2021-22138 affect Logstash?
CVE-2021-22138 affects Logstash by allowing an attacker to perform a man-in-the-middle attack due to a TLS certificate validation flaw in the monitoring feature.
What is the severity of CVE-2021-22138?
CVE-2021-22138 has a severity rating of medium with a value of 3.7.
How can I fix CVE-2021-22138 in Logstash?
To fix CVE-2021-22138 in Logstash, update to version 6.8.15 or above for Logstash 6.x and version 7.12.0 or above for Logstash 7.x.
Where can I find more information about CVE-2021-22138?
You can find more information about CVE-2021-22138 in the following references: [Link 1](https://discuss.elastic.co/t/elastic-stack-7-12-0-and-6-8-15-security-update/268125), [Link 2](https://security.netapp.com/advisory/ntap-20210629-0001/).

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agent/last-modified-date
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agent/softwarecombine
collector/mitre-cve
source/MITRE
vendor/elastic
canonical/elastic logstash
version/elastic logstash/6.4.0
version/elastic logstash/7.0.0

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