NVD

CVE-2021-3422 Detail

Modified

This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.

Description

The lack of validation of a key-value field in the Splunk-to-Splunk protocol results in a denial-of-service in Splunk Enterprise instances configured to index Universal Forwarder traffic. The vulnerability impacts Splunk Enterprise versions before 7.3.9, 8.0 versions before 8.0.9, and 8.1 versions before 8.1.3. It does not impact Universal Forwarders. When Splunk forwarding is secured using TLS or a Token, the attack requires compromising the certificate or token, or both. Implementation of either or both reduces the severity to Medium.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

CNA: Splunk Inc.

Base Score: 7.5 HIGH

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

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: 4.3 MEDIUM

Vector: (AV:N/AC:M/Au:N/C:N/I:N/A:P)

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://claroty.com/2022/03/24/blog-research-locking-down-splunk-enterprise-indexers-and-forwarders/	Third Party Advisory
https://claroty.com/2022/03/24/blog-research-locking-down-splunk-enterprise-indexers-and-forwarders/	Third Party Advisory
https://www.splunk.com/en_us/product-security/announcements/svd-2022-0301.html	Vendor Advisory
https://www.splunk.com/en_us/product-security/announcements/svd-2022-0301.html	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-20	Improper Input Validation	NIST
CWE-125	Out-of-bounds Read	Splunk Inc.

Known Affected Software Configurations Switch to CPE 2.2

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Change History

4 change records found show changes

Initial Analysis by NIST 4/11/2022 3:51:47 PM

Action	Type	Old Value	New Value
Added	CVSS V3.1		NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Added	CVSS V2		NIST (AV:N/AC:M/Au:N/C:N/I:N/A:P)
Added	CWE		NIST CWE-20
Added	CPE Configuration		OR cpe:2.3:a:splunk:splunk:::::enterprise::: versions up to (excluding) 7.3.9 cpe:2.3:a:splunk:splunk:::::enterprise::: versions from (including) 8.0 up to (excluding) 8.0.9 cpe:2.3:a:splunk:splunk:::::enterprise::: versions from (including) 8.1 up to (excluding) 8.1.3
Changed	Reference Type	https://claroty.com/2022/03/24/blog-research-locking-down-splunk-enterprise-indexers-and-forwarders/ No Types Assigned	https://claroty.com/2022/03/24/blog-research-locking-down-splunk-enterprise-indexers-and-forwarders/ Third Party Advisory
Changed	Reference Type	https://www.splunk.com/en_us/product-security/announcements/svd-2022-0301.html No Types Assigned	https://www.splunk.com/en_us/product-security/announcements/svd-2022-0301.html Vendor Advisory

CVE Modified by Splunk Inc. 3/28/2022 3:15:07 PM

Action	Type	Old Value	New Value
Changed	Description	Record truncated, showing 500 of 834 characters. View Entire Change Record The lack of validation of a key-value field in the Splunk-to-Splunk protocol results in a denial-of-service in Splunk Enterprise instances configured to index Universal Forwarder traffic. See https://docs.splunk.com/Documentation/Splunk/latest/Forwarding/Enableareceiver for more information on configuring an indexer to listen for UF traffic. It does not impact Universal Forwarders. When Splunk forwarding is secured using TLS or a Token, the attack requires compromising the certificate or token,	Record truncated, showing 500 of 542 characters. View Entire Change Record The lack of validation of a key-value field in the Splunk-to-Splunk protocol results in a denial-of-service in Splunk Enterprise instances configured to index Universal Forwarder traffic. The vulnerability impacts Splunk Enterprise versions before 7.3.9, 8.0 versions before 8.0.9, and 8.1 versions before 8.1.3. It does not impact Universal Forwarders. When Splunk forwarding is secured using TLS or a Token, the attack requires compromising the certificate or token, or both. Implementation of eith
Added	CVSS V3.1		Splunk Inc. AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Removed	CVSS V3.1	Splunk Inc. AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Added	Reference		https://claroty.com/2022/03/24/blog-research-locking-down-splunk-enterprise-indexers-and-forwarders/ [No Types Assigned]
Removed	Reference	https://claroty.com/2022/03/24/blog-research-locking-down-splunk-enterprise-indexers-and-forwarders/2 [No Types Assigned]

Quick Info

CVE Dictionary Entry:
CVE-2021-3422
NVD Published Date:
03/25/2022
NVD Last Modified:
11/21/2024
Source:
Splunk Inc.

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Information Technology Laboratory

National Vulnerability Database