Is CVE-2019-5421 in the CISA KEV catalog?

No. CVE-2019-5421 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-5421?

CVE-2019-5421 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2019-5421?

CVE-2019-5421 has an EPSS score of 1.56% (72th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-5421?

Upgrade ruby-devise on debian 11 to 4.5.0-3 or later.

CVE & CISA-KEV Catalog

CVE-2019-5421

CRITICALEPSS 72th pctl

9.8

CVSS v3

NVD

Description

Plataformatec Devise version 4.5.0 and earlier, using the lockable module contains a CWE-367 vulnerability in The `Devise::Models::Lockable` class, more specifically at the `#increment_failed_attempts` method. File location: lib/devise/models/lockable.rb that can result in Multiple concurrent requests can prevent an attacker from being blocked on brute force attacks. This attack appear to be exploitable via Network connectivity - brute force attacks. This vulnerability appears to have been fixed in 4.6.0 and later.

CWE-367TOCTOU Race Condition CWE-307

How to fix

Remediation Available

ruby-deviseDebian

Fixed in:4.5.0-3CVE-2019-5421

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

1.56%probability of exploitation in 30 days

72ndpercentile

Elevated risk: more likely to be exploited than 72% of all known CVEs.

References

Patch1

github.com

Exploit1

github.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.