CVE-2021-22138

low-risk
Published 2021-05-13

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.

Do I need to act?

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0.11% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
3
CVSS 3.7/10 Low
NETWORK / HIGH complexity

Affected Products (1)

Logstash

Affected Vendors

Elastic

References (4)

Vendor Advisory https://discuss.elastic.co/t/elastic-stack-7-12-0-and-6-8-15-security-update/268...
Third Party Advisory https://security.netapp.com/advisory/ntap-20210629-0001/
Vendor Advisory https://discuss.elastic.co/t/elastic-stack-7-12-0-and-6-8-15-security-update/268...
Third Party Advisory https://security.netapp.com/advisory/ntap-20210629-0001/
18
/ 100
low-risk
Severity 13/34 · Low
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal