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CVE-2021-1492— Duo Authentication Proxy Installer Denial of Service Vulnerability

Quick assessment

Affected
Cisco Duo Authentication Proxy
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.

DUO Duo Authentication Proxy是美国DUO公司的一个应用程序。用于身份验证代理。 Proxy installer prior to 5.2.1 存在安全漏洞，该漏洞源于没有正确验证文件安装路径。攻击者可利用该漏洞强制安装程序写入任意有特权的目录。

CVSS 6.6 · Medium EPSS 0.27% · P19

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2021-1492

Vulnerability Information
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Vulnerability Title
Duo Authentication Proxy Installer Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
The Duo Authentication Proxy installer prior to 5.2.1 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 Duo Authentication Proxy installer, cause Denial of Service (DoS) by deleting file(s), or replace system files to potentially achieve elevation of privileges. This is only exploitable during new installations, while the installer is running, and is not exploitable once installation has finished. Versions 5.2.1 of Duo Authentication Proxy installer 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:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
Windows快捷方式跟随(.LNK)
Source: CVE Program / CVE List V5
Vulnerability Title
DUO Duo Authentication Proxy 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
DUO Duo Authentication Proxy是美国DUO公司的一个应用程序。用于身份验证代理。 Proxy installer prior to 5.2.1 存在安全漏洞，该漏洞源于没有正确验证文件安装路径。攻击者可利用该漏洞强制安装程序写入任意有特权的目录。
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 Proxy unspecified ~ 5.2.1 -

II. Public POCs for CVE-2021-1492

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III. Intelligence Information for CVE-2021-1492

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Other References for CVE-2021-1492 (1)

IV. Related Vulnerabilities

Same vendor: Cisco
Same weakness: CWE-64

V. Comments for CVE-2021-1492

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