Vulnerability in Elastic Elasticsearch
CVE-2021-22138
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.
Vulnerability class: Improper Certificate Validation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (37.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Elastic Elasticsearch — versions after 6.4.0 and before 6.8.15 and 7.12.0
- Elastic Logstash
Weakness classification (CWE)
References
- discuss.elastic.co/t/elastic-stack-7-12-0-and-6-8-15-security-update/268125 (Vendor Advisory)
- security.netapp.com/advisory/ntap-20210629-0001/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-22138?
- CVE-2021-22138 is a low-severity vulnerability in Elastic Elasticsearch, classified under Improper Certificate Validation. CVSS score: 3.7/10. Published 2021-05-13.
- How severe is CVE-2021-22138?
- Low severity. CVSS v3 base score is 3.7 out of 10.