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CVE-2021-27420— GE UR family input validation

Quick assessment

Affected
GE UR family
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.

GE Grid Solutions UR是法国 （GE Grid Solutions）公司的一个嵌入式操作系统。提供高性能保护，可扩展的I / O，集成的监视和计量，高速通信以及广泛的编程和配置功能。 GE Grid Solutions UR 存在输入验证错误漏洞，该漏洞允许未经身份验证而泄露敏感信息。

CVSS 5.3 · Medium EPSS 1.06% · P63

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-27420

Vulnerability Information
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Vulnerability Title
GE UR family input validation
Source: CVE Program / CVE List V5
Vulnerability Description
GE UR firmware versions prior to version 8.1x web server task does not properly handle receipt of unsupported HTTP verbs, resulting in the web server becoming temporarily unresponsive after receiving a series of unsupported HTTP requests. When unresponsive, the web server is inaccessible. By itself, this is not particularly significant as the relay remains effective in all other functionality and communication channels.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
GE Grid Solutions UR 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GE Grid Solutions UR是法国 （GE Grid Solutions）公司的一个嵌入式操作系统。提供高性能保护，可扩展的I / O，集成的监视和计量，高速通信以及广泛的编程和配置功能。 GE Grid Solutions UR 存在输入验证错误漏洞，该漏洞允许未经身份验证而泄露敏感信息。
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)

Affected Products

Vendor Product Affected Versions CPE Subscribe
GE UR family unspecified ~ 8.1x -

II. Public POCs for CVE-2021-27420

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III. Intelligence Information for CVE-2021-27420

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Vendor Advisories for CVE-2021-27420 (1)

Other References for CVE-2021-27420 (1)

Same Patch Batch · GE · 2022-03-23 · 7 CVEs total

CVE-2021-27426 9.8 CRITICAL GE UR family insecure default variable initialization
CVE-2021-27428 9.8 CRITICAL GE UR family Unrestricted Upload of File with Dangerous Type
CVE-2021-27430 8.4 HIGH GE UR family hardcoded credentials
CVE-2021-27422 7.5 HIGH GE UR family exposure of sensitive information to an unauthorized actor
CVE-2021-27418 5.3 MEDIUM GE UR family input validation
CVE-2021-27424 5.3 MEDIUM GE UR family exposure of sensitive information to an unauthorized actor

IV. Related Vulnerabilities

Same product: UR family
Same vendor: GE
Same weakness: CWE-20

V. Comments for CVE-2021-27420

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