CVE-2020-3442
DuoConnect SSH Connection Vulnerability
02 Description
DuoConnect SSH Connection Vulnerability
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.15% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 3.9% of scored records. A rank, not a probability.
- NVD base score
- 5.7 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2020-07-20 20:45Z6 YR AGO
- Last updated
- 2024-11-13 18:18Z1 YR AGO
- Reserved
- 2019-12-12
- Assigning CNA
- cisco
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 4.8)
- CNA CVSS vector
- CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
- Weaknesses
- CWE-319Cleartext Transmission of Sensitive InformationBase
- Data version
- 5.1
- Document digest
- 6c72ed0d4215e16486d4c220ff441d57e912fe8983ba66eef99798d364d350c3
05 Affected products
06 References
- duo.comDuoConnect SSH Connection Vulnerabilityhttps://duo.com/labs/psa/duo-psa-2020-003
07 Remediation
The Duo Product team has fixed the issue by updating DuoConnect to version 1.1.1, which rejects relay configurations that do not specify an HTTPS-based relay. A DNG instance will automatically instruct users to install the latest version of DuoConnect. Duo administrators do not need to perform any manual updates unless their DNG is not able to connect to the internet to download the new version of the software. In that case, administrators should instruct end-users to download the latest DuoConnect version directly using the links below. Steps required for end-user remediation: Update DuoConnect: End-users will need to update DuoConnect once prompted to do so by the DNG (users will be prompted to upgrade DuoConnect during authentication in their browser from July 7, 2020 onwards). The updated version of DuoConnect can alternatively be downloaded directly from the following locations at any time: Windows - https://dl.duosecurity.com/DuoConnect-1.1.1.msi macOS - https://dl.duosecurity.com/DuoConnect-1.1.1.pkg Linux - https://dl.duosecurity.com/DuoConnect-1.1.1.tar.gz The signature of DuoConnect installer files can be verified at https://duo.com/docs/checksums. End-users will need to update their DuoConnect SSH configuration if they receive the error message shown below: Error: Invalid URL: relay scheme http://server-ssh.example.com invalid: must be https Update the SSH configuration: Locate the http relay in the SSH configuration e.g. “ProxyCommand duoconnect -host=%h:%p