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Vulnerability Details :

CVE-2021-28495

Assigner-Arista

Assigner Org ID-c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7

Published At-09 Sep, 2021 | 12:43

Updated At-03 Aug, 2024 | 21:47

In Arista's MOS (Metamako Operating System) software which is supported on the 7130 product line, under certain conditions, user authentication can be bypassed when API access is enabled via the JSON-RPC APIs. This issue affects: Arista Metamako Operating System All releases in the MOS-0.1x train MOS-0.13 and post releases in the MOS-0.1x train MOS-0.26.6 and below releases in the MOS-0.2x train MOS-0.31.1 and below releases in the MOS-0.3x train

EPSS History

Score

Latest Score

N/A

Percentile

Latest Percentile

N/A

▼Common Vulnerabilities and Exposures (CVE)

cve.org

Assigner:Arista

Assigner Org ID:c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7

Published At:09 Sep, 2021 | 12:43

Updated At:03 Aug, 2024 | 21:47

▼CVE Numbering Authority (CNA)

Affected Products

Vendor

Arista Networks, Inc.

Product

Metamako Operating System

Platforms

Arista 7130 Systems running MOS

Versions

Affected

From MOS-0.13 before MOS-0.13* (custom)
From MOS-0.26.7 before MOS-0.26.7 (custom)
From MOS-0.32.0 before MOS-0.32.0 (custom)

Problem Types

Type	CWE ID	Description
CWE	CWE-287	CWE-287 Improper Authentication

Type: CWE

CWE ID: CWE-287

Description: CWE-287 Improper Authentication

Metrics

Version	Base score	Base severity	Vector
3.1	7.2	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L

Version: 3.1

Base score: 7.2

Base severity: HIGH

Vector:

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

Solutions

Upgrade to MOS-0.26.7 or MOS-0.32.0

Install hotfix stored at https://www.arista.com/assets/data/SecurityAdvisories/SA64-67/SecurityAdvisory64-67-Hotfix-mos-1818-2.0.0-1.11.core2_64.rpm For detailed information about hotfix installation, please see the advisory https://www.arista.com/en/support/advisories-notices/security-advisories/12912-security-advisory-64

References

Hyperlink	Resource
https://www.arista.com/en/support/advisories-notices/security-advisories/12914-security-advisory-66	x_refsource_MISC

Hyperlink: https://www.arista.com/en/support/advisories-notices/security-advisories/12914-security-advisory-66

Resource:

x_refsource_MISC

▼Authorized Data Publishers (ADP)

CVE Program Container

References

Hyperlink	Resource
https://www.arista.com/en/support/advisories-notices/security-advisories/12914-security-advisory-66	x_refsource_MISC x_transferred

Hyperlink: https://www.arista.com/en/support/advisories-notices/security-advisories/12914-security-advisory-66

Resource:

x_refsource_MISC

x_transferred

▼National Vulnerability Database (NVD)

nvd.nist.gov

Source:psirt@arista.com

Published At:09 Sep, 2021 | 13:15

Updated At:22 Sep, 2021 | 16:34

Date Added	Due Date	Vulnerability Name	Required Action
	N/A

Metrics

Type	Version	Base score	Base severity	Vector
Primary	3.1	9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Secondary	3.1	7.2	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L
Primary	2.0	6.8	MEDIUM	AV:N/AC:M/Au:N/C:P/I:P/A:P

Type: Primary

Version: 3.1

Base score: 9.8

Base severity: CRITICAL

Vector:

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

Type: Secondary

Version: 3.1

Base score: 7.2

Base severity: HIGH

Vector:

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

Type: Primary

Version: 2.0

Base score: 6.8

Base severity: MEDIUM

Vector:

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

CPE Matches

Arista Networks, Inc.

>>7130>>-

cpe:2.3:h:arista:7130:-:*:*:*:*:*:*:*

Arista Networks, Inc.

>>metamako_operating_system>>Versions from 0.10.0(inclusive) to 0.13.0(inclusive)

cpe:2.3:o:arista:metamako_operating_system:*:*:*:*:*:*:*:*

Arista Networks, Inc.

>>metamako_operating_system>>Versions from 0.20.0(inclusive) to 0.26.7(inclusive)

cpe:2.3:o:arista:metamako_operating_system:*:*:*:*:*:*:*:*

Arista Networks, Inc.

>>metamako_operating_system>>Versions from 0.30.0(inclusive) to 0.32.0(exclusive)

cpe:2.3:o:arista:metamako_operating_system:*:*:*:*:*:*:*:*

Weaknesses

CWE ID	Type	Source
CWE-287	Primary	nvd@nist.gov
CWE-287	Secondary	psirt@arista.com

CWE ID: CWE-287

Type: Primary

Source: nvd@nist.gov

CWE ID: CWE-287

Type: Secondary

Source: psirt@arista.com

References

Hyperlink	Source	Resource
https://www.arista.com/en/support/advisories-notices/security-advisories/12914-security-advisory-66	psirt@arista.com	Mitigation Vendor Advisory

Hyperlink: https://www.arista.com/en/support/advisories-notices/security-advisories/12914-security-advisory-66

Source: psirt@arista.com

Resource:

Mitigation

Vendor Advisory

CVE-2021-28495

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Attack Patterns

Solution/Workaround

References

EPSS History

Score

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Stakeholder-Specific Vulnerability Categorization (SSVC)

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Affected

Problem Types

Metrics

Metrics Other Info

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Replaced By

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Affected Products

Metrics

Metrics Other Info

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Change History

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