Microsoft Windows Server 20H2 up to Server 2016 Kerberos privileges management

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Microsoft Windows Server 20H2 up to Server 2016. This affects an unknown function of the component Kerberos. Such manipulation leads to privilege escalation. This vulnerability is listed as CVE-2020-17049. The attack may be performed from remote. In addition, an exploit is available. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability was found in Microsoft Windows Server 20H2 up to Server 2016 (Operating System) and classified as critical. Affected by this issue is an unknown part of the component Kerberos. The manipulation with an unknown input leads to a privilege escalation vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability.

The weakness was presented 11/10/2020 as confirmed security guidance (Website). The advisory is available at portal.msrc.microsoft.com. This vulnerability is handled as CVE-2020-17049. The exploitation is known to be difficult. The attack may be launched remotely. Additional levels of successful authentication are necessary for exploitation. Technical details are unknown but a public exploit is available. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

A public exploit has been developed by Jake Karnes in Python and been published 4 weeks after the advisory. The exploit is available at blog.netspi.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. A possible mitigation has been published immediately after the disclosure of the vulnerability.

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Productinfo

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Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.3

VulDB Base Score: 6.6
VulDB Temp Score: 5.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 6.6
Vendor Vector (Microsoft): 🔍

NVD Base Score: 7.2
NVD Vector: 🔍

CNA Base Score: 6.6
CNA Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Jake Karnes
Programming Language: 🔍
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: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Exploit Delay Time: 🔍

Timelineinfo

08/04/2020 🔍
11/10/2020 +98 days 🔍
11/10/2020 +0 days 🔍
11/11/2020 +0 days 🔍
12/08/2020 +26 days 🔍
09/10/2024 +1372 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

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

CVE: CVE-2020-17049 (🔍)
GCVE (CVE): GCVE-0-2020-17049
GCVE (VulDB): GCVE-100-164678
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 11/11/2020 10:19
Updated: 09/10/2024 20:18
Changes: 11/11/2020 10:19 (33), 11/11/2020 10:22 (3), 11/11/2020 10:23 (16), 12/05/2020 09:31 (3), 12/05/2020 09:33 (20), 12/09/2020 08:38 (10), 09/10/2024 20:18 (25)
Complete: 🔍
Committer: misc
Cache ID: 216::103

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