Microsoft Windows 11 21H2/1122 H2/Server 2022 Ancillary Function Driver for WinSock privilege escalation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Microsoft Windows 11 21H2/1122 H2/Server 2022. This issue affects some unknown processing of the component Ancillary Function Driver for WinSock. Executing a manipulation can lead to an unknown weakness. This vulnerability is registered as CVE-2023-21768. It is possible to launch the attack remotely. Furthermore, an exploit is available. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability was found in Microsoft Windows 11 21H2/1122 H2/Server 2022 (Operating System). It has been declared as critical. This vulnerability affects some unknown functionality of the component Ancillary Function Driver for WinSock. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was published 01/10/2023 as confirmed security guidance (Website). The advisory is available at portal.msrc.microsoft.com. This vulnerability was named CVE-2023-21768. Technical details are unknown but a public exploit is available.

A public exploit has been developed by chompie/b33f and been published 3 months after the advisory. It is possible to download the exploit at github.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $25k-$100k.

Applying a patch is able to eliminate this problem.

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Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.1
VulDB Meta Temp Score: 7.5

VulDB Base Score: 8.8
VulDB Temp Score: 7.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 7.8
Vendor Vector (Microsoft): 🔍

CNA Base Score: 7.8
CNA Vector (Microsoft Corporation): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Privilege escalation
CWE: Unknown
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: chompie/b33f
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Timelineinfo

12/13/2022 🔍
01/10/2023 +28 days 🔍
01/10/2023 +0 days 🔍
03/08/2023 +56 days 🔍
03/09/2023 +1 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: portal.msrc.microsoft.com
Status: Confirmed

CVE: CVE-2023-21768 (🔍)
GCVE (CVE): GCVE-0-2023-21768
GCVE (VulDB): GCVE-100-217870
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 01/10/2023 21:47
Updated: 03/09/2023 12:28
Changes: 01/10/2023 21:47 (9), 01/10/2023 21:51 (43), 01/31/2023 22:52 (2), 01/31/2023 23:04 (12), 03/09/2023 12:25 (5), 03/09/2023 12:28 (5)
Complete: 🔍
Committer: mael
Cache ID: 216::103

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