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CVE-2020-17049

A security feature bypass vulnerability exists in the way Key Distribution Center (KDC) determines if a service ticket can be used for delegation via Kerberos Constrained Delegation (KCD).
To exploit the vulnerability, a compromised service that is configured to use KCD could tamper with a service ticket that is not valid for delegation to force the KDC to accept it.
The update addresses this vulnerability by changing how the KDC validates service tickets used with KCD.

Data is provided by the National Vulnerability Database (NVD)
Microsoft ≫ Windows Server 2016 Version20h2
Microsoft ≫ Windows Server 2016 Version1903
Microsoft ≫ Windows Server 2016 Version1909
Microsoft ≫ Windows Server 2016 Version2004
Samba ≫ Samba Version >= 4.1.0 < 4.13.13
Samba ≫ Samba Version >= 4.14.0 < 4.14.9
Samba ≫ Samba Version >= 4.15.0 < 4.15.1
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Type Source Score Percentile
EPSS FIRST.org 21.75% 0.955
CVSS Metriken
Source Base Score Exploit Score Impact Score Vector string
nvd@nist.gov 9 8 10
AV:N/AC:L/Au:S/C:C/I:C/A:C
nvd@nist.gov 7.2 1.2 5.9
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
secure@microsoft.com 6.6 0.7 5.9
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
CWE-863 Incorrect Authorization

The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.