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cve[email protected]CVE-2021-22138
HistoryMay 13, 2021 - 6:15 p.m.

CVE-2021-22138

2021-05-1318:15:09
CWE-295
web.nvd.nist.gov
38
5
logstash
cve-2021-22138
tls certificate
monitoring
security vulnerability
nvd
man-in-the-middle attack

4.3 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:N/A:N

3.7 Low

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

4 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

28.7%

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.

Affected configurations

NVD
Node
elasticlogstashRange6.4.06.8.15
OR
elasticlogstashRange7.0.07.12.0

CNA Affected

[
  {
    "product": "Elasticsearch",
    "vendor": "Elastic",
    "versions": [
      {
        "status": "affected",
        "version": "after 6.4.0 and before 6.8.15 and 7.12.0"
      }
    ]
  }
]

Social References

More

4.3 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:N/A:N

3.7 Low

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

4 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

28.7%