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CVE-2022-20821— Cisco IOS XR Software Health Check Open Port Vulnerability

Quick assessment

Affected
Cisco Cisco IOS XR Software
Exploitation
Confirmed exploitation in the wild; remediate immediately
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cisco IOS XR是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。 Cisco IOS XR 存在信息泄露漏洞，该漏洞源于health check RPM 在激活时默认打开TCP端口6379，允许未经身份验证的远程攻击者访问正在NOSi容器内运行的Redis实例，攻击者利用该漏洞可以向Redis容器文件系统写入任意文件，并获取关于Redis数据库的信息。

CVSS 6.5 · Medium KEV EPSS 12.09% · P96
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I. Basic Information for CVE-2022-20821

Vulnerability Information
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Vulnerability Title
Cisco IOS XR Software Health Check Open Port Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the health check RPM of Cisco IOS XR Software could allow an unauthenticated, remote attacker to access the Redis instance that is running within the NOSi container. This vulnerability exists because the health check RPM opens TCP port 6379 by default upon activation. An attacker could exploit this vulnerability by connecting to the Redis instance on the open port. A successful exploit could allow the attacker to write to the Redis in-memory database, write arbitrary files to the container filesystem, and retrieve information about the Redis database. Given the configuration of the sandboxed container that the Redis instance runs in, a remote attacker would be unable to execute remote code or abuse the integrity of the Cisco IOS XR Software host system.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco IOS XR 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco IOS XR是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。 Cisco IOS XR 存在信息泄露漏洞，该漏洞源于health check RPM 在激活时默认打开TCP端口6379，允许未经身份验证的远程攻击者访问正在NOSi容器内运行的Redis实例，攻击者利用该漏洞可以向Redis容器文件系统写入任意文件，并获取关于Redis数据库的信息。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Cisco Cisco IOS XR Software n/a -

II. Public POCs for CVE-2022-20821

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III. Intelligence Information for CVE-2022-20821

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Vendor Advisories for CVE-2022-20821 (1)

IV. Related Vulnerabilities

Same product: Cisco IOS XR Software
Same vendor: Cisco
Same weakness: CWE-200

V. Comments for CVE-2022-20821

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