Vulnerability Details : 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.
Products affected by CVE-2020-17049
- 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_2016:1903:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2016:1909:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2016:20h2:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*
- cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
- cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
- cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
Threat overview for CVE-2020-17049
Top countries where our scanners detected CVE-2020-17049
Top open port discovered on systems with this issue
445
IPs affected by CVE-2020-17049 165,534
Threat actors abusing to this issue?
Yes
Find out if you* are
affected by CVE-2020-17049!
*Directly or indirectly through your vendors, service providers and 3rd parties.
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attack surface intelligence
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Exploit prediction scoring system (EPSS) score for CVE-2020-17049
2.45%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 90 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-17049
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
9.0
|
HIGH | AV:N/AC:L/Au:S/C:C/I:C/A:C |
8.0
|
10.0
|
NIST | |
|
7.2
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
1.2
|
5.9
|
NIST | |
|
6.6
|
MEDIUM | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H |
0.7
|
5.9
|
Microsoft Corporation |
CWE ids for CVE-2020-17049
-
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. This allows attackers to bypass intended access restrictions.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-17049
-
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17049
CVE-2020-17049 - Security Update Guide - Microsoft - Kerberos Security Feature Bypass VulnerabilityPatch;Vendor Advisory
-
http://www.openwall.com/lists/oss-security/2021/11/10/3
oss-security - Fwd: Samba 4.15.2, 4.14.10, 4.13.14 Security Releases are available for DownloadMailing List;Third Party Advisory
-
https://security.gentoo.org/glsa/202309-06
Samba: Multiple Vulnerabilities (GLSA 202309-06) — Gentoo security
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