Vulnerability CVE-2021-22138

Vulnerability Name:

CVE-2021-22138 (CCN-202059)

Assigned:

2021-03-23

Published:

2021-03-23

Updated:

2022-06-04

Summary:

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.

CVSS v3 Severity:

3.7 Low (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N)
3.2 Low (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): High Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): Low Integrity (I): None Availibility (A): None

2.6 Low (CCN CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N)
2.3 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Adjacent Attack Complexity (AC): High Privileges Required (PR): None User Interaction (UI): Required
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): Low Integrity (I): None Availibility (A): None

CVSS v2 Severity:

4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Medium Authentication (Au): None
Impact Metrics:	Confidentiality (C): Partial Integrity (I): None Availibility (A): None

1.4 Low (CCN CVSS v2 Vector: AV:A/AC:H/Au:S/C:P/I:N/A:N)

Exploitability Metrics:	Access Vector (AV): Adjacent_Network Access Complexity (AC): High Athentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): Partial Integrity (I): None Availibility (A): None

Vulnerability Type:

CWE-295

Vulnerability Consequences:

Obtain Information

References:

Source: MITRE
Type: CNA
CVE-2021-22138

Source: CCN
Type: Elasticsearch ESA-2021-09
Logstash certificate verification bypass

Source: MISC
Type: Vendor Advisory
https://discuss.elastic.co/t/elastic-stack-7-12-0-and-6-8-15-security-update/268125

Source: XF
Type: UNKNOWN
elastic-cve202122138-mitm(202059)

Source: CONFIRM
Type: Third Party Advisory
https://security.netapp.com/advisory/ntap-20210629-0001/

Source: CCN
Type: IBM Security Bulletin 6538160 (Cloud Private)
Vulnerability in Elasticsearch affects IBM Cloud Private (CVE-2021-22138)

Source: CCN
Type: IBM Security Bulletin 6538162 (Cloud Private)
Vulnerability in Elasticsearch affects IBM Cloud Private (CVE-2021-22138)

Vulnerable Configuration:

Configuration 1:

cpe:/a:elastic:logstash:*:*:*:*:*:*:*:* (Version >= 7.0.0 and < 7.12.0)

OR cpe:/a:elastic:logstash:*:*:*:*:*:*:*:* (Version >= 6.4.0 and < 6.8.15)

Configuration CCN 1:

cpe:/a:ibm:cloud_private:3.2.1:cd:*:*:*:*:*:*

OR cpe:/a:ibm:cloud_private:3.2.2:cd:*:*:*:*:*:*

Denotes that component is vulnerable

BACK