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CVE-2021-27798— privileged directory transversal.in Brocade Fabric OS versions 7.4.1.x and 7.3.x

Quick assessment

Affected
Brocade Brocade Fabric OS
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.

Brocade Fabric OS（FOS）是美国博科（Brocade）公司的一套使用在交换机和路由器等设备中的嵌入式操作系统。 Brocade Fabric OS 7.3.1d 到 7.4.1b版本存在路径遍历漏洞，该漏洞源于处理目录遍历序列时存在输入验证错误，攻击者利用该漏洞可以使用二进制文件和制表符补全列出整个文件系统。

AI Predicted 3.7 Difficulty: Trivial EPSS 0.23% · P12

Possible ATT&CK Techniques 1 AI

T1083 · File and Directory Discovery
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I. Basic Information for CVE-2021-27798

Vulnerability Information
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Vulnerability Title
privileged directory transversal.in Brocade Fabric OS versions 7.4.1.x and 7.3.x
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in Brocade Fabric OS versions 7.4.1b and 7.3.1d could allow local users to conduct privileged directory transversal. Brocade Fabric OS versions 7.4.1.x and 7.3.x have reached end of life. Brocade Fabric OS Users should upgrade to supported versions as described in the Product End-of-Life published report.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Brocade Fabric OS 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Brocade Fabric OS（FOS）是美国博科（Brocade）公司的一套使用在交换机和路由器等设备中的嵌入式操作系统。 Brocade Fabric OS 7.3.1d 到 7.4.1b版本存在路径遍历漏洞，该漏洞源于处理目录遍历序列时存在输入验证错误，攻击者利用该漏洞可以使用二进制文件和制表符补全列出整个文件系统。
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
Brocade Brocade Fabric OS Brocade Fabric OS 7.4.1b, and 7.3.1d. -

II. Public POCs for CVE-2021-27798

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III. Intelligence Information for CVE-2021-27798

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Other References for CVE-2021-27798 (1)

IV. Related Vulnerabilities

Same product: Brocade Fabric OS
Same vendor: Brocade
Same weakness: CWE-22

V. Comments for CVE-2021-27798

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