Microsoft Windows up to Server 2019 Kerberos privileges management

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CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

A vulnerability was found in Microsoft Windows up to Server 2019 (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. 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 since 08/04/2020. 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.

A public exploit has been developed by Jake Karnes in Python and been published 4 weeks after the advisory. It is declared as proof-of-concept. The exploit is available at blog.netspi.com. 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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VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.0

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: 🔒

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VulDB Base Score: 🔒
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Exploitinginfoedit

Class: Privilege escalation
CWE: CWE-269
ATT&CK: Unknown

Local: No
Remote: Yes

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

Price Prediction: 🔍
Current Price Estimation: 🔒

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Countermeasuresinfoedit

Recommended: Patch
Status: 🔍

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

Timelineinfoedit

08/04/2020 CVE assigned
11/10/2020 +98 days Advisory disclosed
11/10/2020 +0 days Countermeasure disclosed
11/11/2020 +0 days VulDB entry created
12/08/2020 +26 days Exploit disclosed
12/09/2020 +1 days VulDB last update

Sourcesinfoedit

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

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

CVE: CVE-2020-17049 (🔒)
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfoedit

Created: 11/11/2020 10:19 AM
Updated: 12/09/2020 08:38 AM
Changes: (1) exploit_developer_website
Complete: 🔍
Committer: misc

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