Vulnerability · Published Oct 14, 2020 · Assigned by cisco

CVE-2020-3483Duo Network Gateway (DNG) Information Disclosure Vulnerability

High 7.1

In plain English

A high-severity security flaw in Duo Network Gateway (DNG) from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities).

Severity (CVSS 3.1)7.1High

Exploit odds (30 days)0.1%top 96.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
Cisco	Duo Network Gateway (DNG)	unspecified – before 1.5.8

Weakness: CWE-256 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

References

Duo Network Gateway (DNG) Information Disclosure Vulnerability vendor-advisory, x_refsource_CISCO