CVE-2020-17049

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. 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.

6.6 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 0.7 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

9.0 /10

CVSS v2.0 : HIGH

V2 Legend

Vector : AV:N/AC:L/Au:S/C:C/I:C/A:C

Exploitability : 8.0 / Impact : 10.0

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

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

Configuration 1 (hide)

OR cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:20h2:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:1903:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:1909:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*

Configuration 2 (hide)

OR cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
History

21 Nov 2024, 05:07

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

10 Sep 2024, 16:15

Type Values Removed Values Added
Summary (en) <p>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).</p> <p>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.</p> <p>The update addresses this vulnerability by changing how the KDC validates service tickets used with KCD.</p> (en) 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.

31 Dec 2023, 19:15

Type Values Removed Values Added
Summary Kerberos Security Feature Bypass Vulnerability <p>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).</p> <p>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.</p> <p>The update addresses this vulnerability by changing how the KDC validates service tickets used with KCD.</p>
References
  • (GENTOO) https://security.gentoo.org/glsa/202309-06 -
CPE cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
CVSS v2 : 9.0
v3 : 7.2 		v2 : 9.0
v3 : 6.6
CWE NVD-CWE-noinfo CWE-863

30 Nov 2021, 22:22

Type Values Removed Values Added
References (MLIST) http://www.openwall.com/lists/oss-security/2021/11/10/3 - (MLIST) http://www.openwall.com/lists/oss-security/2021/11/10/3 - Mailing List, Third Party Advisory

10 Nov 2021, 16:15

Type Values Removed Values Added
CWE CWE-269 NVD-CWE-noinfo
References
  • (MLIST) http://www.openwall.com/lists/oss-security/2021/11/10/3 -
Information

Published : 2020-11-11 07:15

Updated : 2024-11-21 05:07

NVD link : CVE-2020-17049

Mitre link : CVE-2020-17049

CVE.ORG link : CVE-2020-17049

JSON object : View

Products Affected

samba

  • samba

microsoft

  • windows_server_2019
  • windows_server_2016
  • windows_server_2012
CWE
CWE-863

Incorrect Authorization