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

6.6MEDIUM

Key Information:

Vendor

Cisco
Status
Duo Authentication For Windows Logon And Rdp
Vendor
CVE Published:
14 October 2020

What is CVE-2020-3427?

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.

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Affected Version(s)

Duo Authentication for Windows Logon and RDP < 4.1.2

References

https://duo.com/docs/rdp-notes
vendor-advisoryx_refsource_CISCO

CVSS V3.1

Score:
6.6
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

This issue was reported by Ido Hoorvitch from CyberArk
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