CVE-2020-3483: Duo has identified and fixed an issue with the Duo Network Gateway (DNG) product in which some customer-provid

Routine

HIGH 7.1UPGRADE

CVE-2020-3483 is a high-severity flaw (CVSS 7.1) affecting duo network gateway. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 encrypt

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.1 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.1% (top 96%)
CISA exploited list	No
Weakness	CWE-256, CWE-522
Published	2020-10-14
Last modified	2026-06-17

Publisher (CNA): Cisco Systems, Inc. · Vendor: cisco

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-10-14 19:15 UTCPublished CVE record published
2026-06-17 03:18 UTCUpdated Record last modified

cisco duo network gateway UPGRADE

Affected: >= 1.3.3 and <= 1.5.7

Fixed in: newer than 1.5.7

Safe to downgrade to: a release before 1.3.3

1. Check installed version

apt-cache policy duo-network-gateway || rpm -q duo-network-gateway || duo-network-gateway --version

2. UPGRADE to newer than 1.5.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade duo-network-gateway

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade duo-network-gateway

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.3.3 (Debian / Ubuntu)

apt-cache madison duo-network-gateway sudo apt install duo-network-gateway=<VERSION_BEFORE_1.3.3> sudo apt-mark hold duo-network-gateway

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list duo-network-gateway sudo dnf downgrade duo-network-gateway-<VERSION_BEFORE_1.3.3> sudo dnf versionlock add duo-network-gateway

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-3483?

duo network gateway: upgrade to newer than 1.5.7. Exact commands for each OS are on this page.

Is CVE-2020-3483 being exploited?

CVE-2020-3483 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-3483 affect?

CVE-2020-3483 affects duo network gateway. Severity is high (CVSS 7.1). 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 informatio

How urgent is CVE-2020-3483?

Priority 26/100. High severity

Software pages

Cisco vulnerabilities

Related CVEs

CVE-2018-7340 HIGH 7.5 UPGRADE Duo Network Gateway 1.2.9 and earlier may incorrectly utilize the results of XML DOM traversal and canonicaliz

References

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