VDB-274207 · CVE-2024-6768 · GCVE-0-2024-6768

Microsoft Windows up to Server 2022 CLFS.sys KeBugCheckEx improper validation of specified quantity in input

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.0	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in Microsoft Windows 10/11/Server 2016/Server 2019/Server 2022 and classified as critical. Affected is the function KeBugCheckEx in the library CLFS.sys. This manipulation causes improper validation of specified quantity in input. This vulnerability is tracked as CVE-2024-6768. The attack is restricted to local execution. Moreover, an exploit is present.

Detailsinfo

A vulnerability has been found in Microsoft Windows 10/11/Server 2016/Server 2019/Server 2022 and classified as critical. Affected by this vulnerability is the function KeBugCheckEx in the library CLFS.sys. The manipulation with an unknown input leads to a improper validation of specified quantity in input vulnerability. The CWE definition for the vulnerability is CWE-1284. The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties. As an impact it is known to affect availability. The summary by CVE is:

A Denial of Service in CLFS.sys in Microsoft Windows 10, Windows 11, Windows Server 2016, Windows Server 2019, and Windows Server 2022 allows a malicious authenticated low-privilege user to cause a Blue Screen of Death via a forced call to the KeBugCheckEx function.

The weakness was disclosed by Ricardo Narvaja. It is possible to read the advisory at fortra.com. This vulnerability is known as CVE-2024-6768 since 07/15/2024. The exploitation appears to be easy. Attacking locally is a requirement. Technical details and also a public exploit are known.

It is possible to download the exploit at packetstormsecurity.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Operating System

Vendor

Microsoft

Name

Windows

Version

License

commercial

Website

Vendor: https://www.microsoft.com/
Product: https://www.microsoft.com/en-us/windows

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔍
CNA CVSS-BT Score: 🔍
CNA Vector: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.5
VulDB Temp Score: 5.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper validation of specified quantity in input
CWE: CWE-1284 / CWE-703
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

07/15/2024 🔍
08/12/2024 +28 days 🔍
08/12/2024 +0 days 🔍
08/14/2024 +2 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: fortra.com
Researcher: Ricardo Narvaja
Status: Not defined

CVE: CVE-2024-6768 (🔍)
GCVE (CVE): GCVE-0-2024-6768
GCVE (VulDB): GCVE-100-274207
scip Labs: https://www.scip.ch/en/?labs.20161215

Entryinfo

Created: 08/12/2024 21:56
Updated: 08/14/2024 17:27
Changes: 08/12/2024 21:56 (68), 08/13/2024 21:57 (1), 08/14/2024 17:27 (10)
Complete: 🔍
Cache ID: 216::103