Is CVE-2020-27780 in the CISA KEV catalog?

No. CVE-2020-27780 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-27780?

CVE-2020-27780 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2020-27780?

CVE-2020-27780 has an EPSS score of 1.96% (78th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-27780?

Upgrade linux-pam to 1.5.1 or later.

CVE & CISA-KEV Catalog

CVE-2020-27780

CRITICALEPSS 78th pctl

9.8

CVSS v3

NVD

Description

A flaw was found in Linux-Pam in versions prior to 1.5.1 in the way it handle empty passwords for non-existing users. When the user doesn't exist PAM try to authenticate with root and in the case of an empty password it successfully authenticate.

CWE-287Improper Authentication

How to fix

Remediation Available

linux-pamNVD

Affected:>= 1.5.0, < 1.5.1Fixed in:1.5.1CVE-2020-27780derived 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 VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.96%probability of exploitation in 30 days

78thpercentile

Elevated risk: more likely to be exploited than 78% of all known CVEs.

References

Third-Party Advisory1

bugzilla.redhat.com

Related Vulnerabilities

Other CWE-287 (Improper Authentication) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-35082	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2023-35078	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2017-7921	Critical	9.8	100%	KEV	-
CVE-2024-7593	Critical	9.8	100%	KEV	-
CVE-2023-46805	High	8.2	100%	KEV + Ransom	-
CVE-2022-40684	Critical	9.8	100%	KEV + Ransom	Fix

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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.