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cve[email protected]CVE-2020-17049
HistoryNov 11, 2020 - 7:15 a.m.

CVE-2020-17049

2020-11-1107:15:00
CWE-863
web.nvd.nist.gov
635
In Wild
39
20
cve
2020
17049
kerberos
security
feature bypass
vulnerability
nvd

6.6 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

7.7 High

AI Score

Confidence

High

9 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.027 Low

EPSS

Percentile

90.4%

<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>

VendorProductVersionCPE
microsoftwindows_server_2019*cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
microsoftwindows_server_2019*cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
microsoftwindows_server,_version_190910.0.0cpe:2.3:o:microsoft:windows_server,_version_1909:10.0.0:*:*:*:*:*:*:*
microsoftwindows_server,_version_190310.0.0cpe:2.3:o:microsoft:windows_server,_version_1903:10.0.0:*:*:*:*:*:*:*
microsoftwindows_server_version_2004*cpe:2.3:o:microsoft:windows_server_version_2004:*:*:*:*:*:*:*:*
microsoftwindows_server_2016*cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
microsoftwindows_server_2016*cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
microsoftwindows_server_2008_sp2*cpe:2.3:o:microsoft:windows_server_2008_sp2:*:sp2:*:*:*:*:*:*
microsoftwindows_server_2008_sp2*cpe:2.3:o:microsoft:windows_server_2008_sp2:*:sp2:*:*:*:*:*:*
microsoftwindows_server_2008_sp2*cpe:2.3:o:microsoft:windows_server_2008_sp2:*:sp2:*:*:*:*:*:*
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Social References

More

6.6 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

7.7 High

AI Score

Confidence

High

9 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.027 Low

EPSS

Percentile

90.4%