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CVE-2021-28507— An issue has recently been discovered in Arista EOS where, under certain conditions, the service ACL configured for OpenConfig gNOI and OpenConfig RESTCONF might be bypassed, which results in the denied requests being forwarded to the agent.

Quick assessment

Affected
Arista Networks EOS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Arista Networks Arista EOS是美国Arista Networks公司的一款应用于数据中心和云网络中心的可扩展操作系统。 Arista EOS 构建的云架构可扩展到数十万个计算和存储节点，并具有大规模工作的管理和配置功能，通过其可编程性，EOS 支持一系列软件应用程序，可提供工作流程自动化、高可用性、前所未有的网络可视性和分析以及与虚拟化、管理、自动化和编排服务的各种第三方应用程序的快速集成。 Arista Networks Arista EOS中存在安全漏洞，该漏洞源于在某些情况下

CVSS 5.5 · Medium EPSS 0.67% · P49

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-28507

Vulnerability Information
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Vulnerability Title
An issue has recently been discovered in Arista EOS where, under certain conditions, the service ACL configured for OpenConfig gNOI and OpenConfig RESTCONF might be bypassed, which results in the denied requests being forwarded to the agent.
Source: CVE Program / CVE List V5
Vulnerability Description
An issue has recently been discovered in Arista EOS where, under certain conditions, the service ACL configured for OpenConfig gNOI and OpenConfig RESTCONF might be bypassed, which results in the denied requests being forwarded to the agent.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Arista Networks Arista EOS安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Arista Networks Arista EOS是美国Arista Networks公司的一款应用于数据中心和云网络中心的可扩展操作系统。 Arista EOS 构建的云架构可扩展到数十万个计算和存储节点，并具有大规模工作的管理和配置功能，通过其可编程性，EOS 支持一系列软件应用程序，可提供工作流程自动化、高可用性、前所未有的网络可视性和分析以及与虚拟化、管理、自动化和编排服务的各种第三方应用程序的快速集成。 Arista Networks Arista EOS中存在安全漏洞，该漏洞源于在某些情况下
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Arista Networks EOS 4.22.x -

II. Public POCs for CVE-2021-28507

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III. Intelligence Information for CVE-2021-28507

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Other References for CVE-2021-28507 (1)

Same Patch Batch · Arista Networks · 2022-01-14 · 4 CVEs total

CVE-2021-28500 9.1 CRITICAL An issue has recently been discovered in Arista EOS where the incorrect use of EOS's AAA A
CVE-2021-28501 9.1 CRITICAL An issue has recently been discovered in Arista EOS where the incorrect use of EOS's AAA A
CVE-2021-28506 9.1 CRITICAL An issue has recently been discovered in Arista EOS where certain gNOI APIs incorrectly sk

IV. Related Vulnerabilities

Same product: EOS
Same vendor: Arista Networks
Same weakness: CWE-284

V. Comments for CVE-2021-28507

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