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VULNERABILITIES

CVE-2020-17049 Details

Description

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.

Metrics

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17049 CVEPatchVendor Advisory
https://security.gentoo.org/glsa/202309-06 CVE
http://www.openwall.com/lists/oss-security/2021/11/10/3 CVEMailing ListThird Party Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17049 [email protected]PatchVendor Advisory
https://security.gentoo.org/glsa/202309-06 [email protected]

see all 6 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-863Incorrect Authorization[email protected]

Affected Products

ProductVersions
microsoft windows server 2012
r2

CPE

  • cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:*:*
  • cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
microsoft windows server 2016
20h2
1903
1909
2004

CPE

  • 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:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
microsoft windows server 2019
All versions

CPE

  • cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
samba samba
>= 4.1.0, < 4.13.13
>= 4.14.0, < 4.14.9
>= 4.15.0, < 4.15.1

CPE

  • cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

13 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2020-17049
NVD Published Date:
Nov 11, 2020
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2020-17049 Details - Not Deferred