Is CVE-2020-3427 in the CISA KEV catalog?

No. CVE-2020-3427 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-3427?

CVE-2020-3427 has a CVSS v3 base score of 6.6 (MEDIUM).

What is the EPSS score for CVE-2020-3427?

CVE-2020-3427 has an EPSS score of 0.30% (22th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-3427?

Upgrade duo authentication for windows logon and rdp to 4.1.2 or later.

CVE & CISA-KEV Catalog

CVE-2020-3427

MEDIUM

6.6

CVSS v3

NVD

Description

The Windows Logon installer prior to 4.1.2 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 Windows Logon, cause Denial of Service (DoS) by deleting file(s), or replace system files to potentially achieve elevation of privileges. Note that this can only exploitable during new installations while the installer is running and is not exploitable once installation is finished. Versions 4.1.2 of Windows Logon addresses this issue.

CWE-280Improper Handling of Insufficient Permissions

How to fix

Remediation Available

duo authentication for windows logon and rdpNVD

Affected:< 4.1.2Fixed in:4.1.2CVE-2020-3427derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

0.30%probability of exploitation in 30 days

22ndpercentile

Low risk: more likely to be exploited than 22% of all known CVEs.

References

Vendor Advisory1

duo.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.