What is the CVSS score of CVE-2021-3622?

CVE-2021-3622 has a CVSS 3.1 base score of 4.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L. EPSS exploitation probability: 4.8%.

Is there a public PoC exploit available for CVE-2021-3622?

Yes, a public proof-of-concept exploit is available for CVE-2021-3622. Prioritise patching immediately. EPSS: 4.8%.

Is there a patch available for CVE-2021-3622?

Yes, a patch is available for CVE-2021-3622. Update the affected software to the latest version immediately.

Hivex CVE-2021-3622

MEDIUM

Uncontrolled Resource Consumption (CWE-400)

2021-12-23 secalert@redhat.com

Microsoft Denial Of Service Hivex Enterprise Linux Enterprise Linux Workstation Fedora

4.3

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

4.3 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Lifecycle Timeline

CVE Published

Dec 23, 2021 - 21:15 nvd

MEDIUM 4.3

DescriptionNVD

A flaw was found in the hivex library. This flaw allows an attacker to input a specially crafted Windows Registry (hive) file, which would cause hivex to recursively call the _get_children() function, leading to a stack overflow. The highest threat from this vulnerability is to system availability.

AnalysisAI

A flaw was found in the hivex library. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified as Uncontrolled Resource Consumption (CWE-400), which allows attackers to cause denial of service by exhausting system resources. A flaw was found in the hivex library. This flaw allows an attacker to input a specially crafted Windows Registry (hive) file, which would cause hivex to recursively call the _get_children() function, leading to a stack overflow. The highest threat from this vulnerability is to system availability. Affected products include: Redhat Hivex, Redhat Enterprise Linux, Redhat Enterprise Linux Workstation, Fedoraproject Fedora.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Implement rate limiting, set resource quotas, validate input sizes, use timeouts.