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

CVE-2019-5421 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 1.6%.

Is there a public PoC exploit available for CVE-2019-5421?

Yes, a public proof-of-concept exploit is available for CVE-2019-5421. Prioritise patching immediately. EPSS: 1.6%.

Is there a patch available for CVE-2019-5421?

Yes, a patch is available for CVE-2019-5421. Update the affected software to the latest version immediately.

Devise CVE-2019-5421

CRITICAL

Time-of-check Time-of-use (TOCTOU) Race Condition (CWE-367)

2019-04-03 support@hackerone.com

Information Disclosure Devise

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Apr 03, 2019 - 15:29 nvd

CRITICAL 9.8

DescriptionNVD

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.

AnalysisAI

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. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified under CWE-367. 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. Affected products include: Plataformatec Devise. Version information: version 4.5.0.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.