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CVE-2020-3427— Duo Authentication for Windows Logon and RDP Privilege Escalation Vulnerability

Quick assessment

Affected
Cisco Duo Authentication for Windows Logon and RDP
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.

Microsoft Windows是美国微软（Microsoft）公司的一种桌面操作系统。 Duo Authentication Windows Logon 和 RDP implementation存在安全漏洞，该漏洞源于在实现的双重身份验证中存在特权升级漏洞。本地攻击者可利用该漏洞覆盖特权目录中的文件。

CVSS 6.6 · Medium EPSS 0.31% · P24
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I. Basic Information for CVE-2020-3427

Vulnerability Information
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Vulnerability Title
Duo Authentication for Windows Logon and RDP Privilege Escalation Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
The Windows Logon installer prior to 4.1.2 did not properly validate file installation paths. This allows an attacker with local user privileges to coerce the installer to write to arbitrary privileged directories. If successful, an attacker can manipulate files used by Windows Logon, cause Denial of Service (DoS) by deleting file(s), or replace system files to potentially achieve elevation of privileges. Note that this can only exploitable during new installations while the installer is running and is not exploitable once installation is finished. Versions 4.1.2 of Windows Logon addresses this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不充分权限或特权的处理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Windows 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Windows是美国微软（Microsoft）公司的一种桌面操作系统。 Duo Authentication Windows Logon 和 RDP implementation存在安全漏洞，该漏洞源于在实现的双重身份验证中存在特权升级漏洞。本地攻击者可利用该漏洞覆盖特权目录中的文件。
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
Cisco Duo Authentication for Windows Logon and RDP unspecified ~ 4.1.2 -

II. Public POCs for CVE-2020-3427

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III. Intelligence Information for CVE-2020-3427

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Other References for CVE-2020-3427 (1)

IV. Related Vulnerabilities

Same vendor: Cisco
Same weakness: CWE-280

V. Comments for CVE-2020-3427

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