Is CVE-2023-20123 in the CISA KEV catalog?

No. CVE-2023-20123 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-20123?

CVE-2023-20123 has a CVSS v3 base score of 6.3 (MEDIUM).

What is the EPSS score for CVE-2023-20123?

CVE-2023-20123 has an EPSS score of 0.25% (16th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-20123?

Upgrade duo to 2.0.1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2023-20123

MEDIUM

6.3

CVSS v3

NVD

Description

A vulnerability in the offline access mode of Cisco Duo Two-Factor Authentication for macOS and Duo Authentication for Windows Logon and RDP could allow an unauthenticated, physical attacker to replay valid user session credentials and gain unauthorized access to an affected macOS or Windows device. This vulnerability exists because session credentials do not properly expire. An attacker could exploit this vulnerability by replaying previously used multifactor authentication (MFA) codes to bypass MFA protection. A successful exploit could allow the attacker to gain unauthorized access to the affected device.

CWE-294

How to fix

Remediation Available

duoNVD

Affected:< 2.0.1Fixed in:2.0.1CVE-2023-20123derived from NVD

duo authentication for windows logon and rdpNVD

Affected:< 4.2.2Fixed in:4.2.2CVE-2023-20123derived 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 VectorPhysical

Attack ComplexityHigh

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.25%probability of exploitation in 30 days

16thpercentile

Low risk: more likely to be exploited than 16% of all known CVEs.

References

Vendor Advisory1

sec.cloudapps.cisco.com

Related Vulnerabilities

Other CWE-294 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-23397	Critical	9.8	97%	KEV	Fix
CVE-2017-3191	Critical	9.8	63%	-	-
CVE-2023-49231	Critical	9.8	43%	-	-
CVE-2002-0054	High	7.5	22%	-	-
CVE-2022-22806	Critical	9.8	12%	-	-
CVE-2022-29593	Medium	5.9	10%	-	-

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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.