CVE-2021-1492 - CVE House
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Status published Medium CVE-2021-1492

Duo Authentication Proxy Installer Denial of Service Vulnerability

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Duo Security appreciates Ido Hoorvitch from CyberArk Labs for reporting the method of exploitation.

References

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Affected Vendor

Affected Software

Duo Authentication Proxy
Vulnerable Versions:
unspecified

Timeline

Official Publish: March 25th, 2021
Last Modified: November 8th, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H

Weaknesses (CWE)

CWE-64

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.