Read the docs
TI-2020-03029 Aliases CVE-2020-3483GHSA-6348-6g85-hp24

Duo Network Gateway (DNG) Information Disclosure Vulnerability

Priority LOW 32CWE-256Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-256.

Summary

Duo has identified and fixed an issue with the Duo Network Gateway (DNG) product in which some customer-provided SSL certificates and private keys were not excluded from logging. This issue resulted in certificate and private key information being written out in plain-text to local files on the DNG host. Any private keys logged in this way could be viewed by those with access to the DNG host operating system without any need for reversing encrypted values or similar techniques. An attacker that gained access to the DNG logs and with the ability to intercept and manipulate network traffic between a user and the DNG, could decrypt and manipulate SSL/TLS connections to the DNG and to the protected applications behind it. Duo Network Gateway (DNG) versions 1.3.3 through 1.5.7 are affected.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00146 3rd percentileScored 2026-11-07
Fix Fixed Duo Network Gateway (DNG) (Cisco): 1.5.8

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CiscoDuo Network Gateway (DNG)before 1.5.81.5.8Patch availableCNA
  • Duo Network Gateway (DNG) VendorCisco Affected before 1.5.8 Fixed in 1.5.8 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:cisco:duo_network_gateway:*:*:*:*:*:*:*:*1.3.3 – 1.5.7VulnerableCisco
  • cpe:2.3:a:cisco:duo_network_gateway:*:*:*:*:*:*:*:* Versions 1.3.3 – 1.5.7 Vulnerable ·Cisco

Remediation

  • Fix · CNA Duo Network Gateway (DNG) (Cisco) Fixed in 1.5.8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-3483
  2. 2026-10-03 Alias added: GHSA-6348-6g85-hp24

References

Patch 1

  • TI-2018-05330 Multiple SAML libraries may allow authentication bypass via incorrect XML canonicalization and DOM traversal CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences