9

CVE-2020-17049

Kerberos KDC Security Feature Bypass Vulnerability

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Microsoft ≫ Windows Server 2016 Version 20h2
Microsoft ≫ Windows Server 2016 Version 1903
Microsoft ≫ Windows Server 2016 Version 1909
Microsoft ≫ Windows Server 2016 Version 2004
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 Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 13.79% 0.96
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 9 8 10
AV:N/AC:L/Au:S/C:C/I:C/A:C
NIST 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
Microsoft 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.

https://security.gentoo.org/glsa/202309-06
http://www.openwall.com/lists/oss-security/2021/11/10/3
Third Party Advisory
Mailing List
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17049
Patch
Vendor Advisory