6.6
Medium
CVE-2020-17049 A security feature bypass vulnerability exists in the way Key Distribution Center (KDC) determines if a service ticket…
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Windows Server 2019 10.0 | 10.0.0 → < 10.0.17763.2061 | 10.0.17763.2061 |
| Windows Server 2019 (Server Core installation) 10.0 | 10.0.0 → < 10.0.17763.2061 | 10.0.17763.2061 |
| Windows Server, version 1909 (Server Core installation) 10.0 | 10.0.0 → latest | No fix stated |
| Windows Server, version 1903 (Server Core installation) 10.0 | 10.0.0 → latest | No fix stated |
| Windows Server version 2004 10.0 | 10.0.0 → < 10.0.19041.1110 | 10.0.19041.1110 |
| Windows Server 2016 10.0 | 10.0.0 → < 10.0.14393.4530 | 10.0.14393.4530 |
| Windows Server 2016 (Server Core installation) 10.0 | 10.0.0 → < 10.0.14393.4530 | 10.0.14393.4530 |
| Windows Server 2008 Service Pack 2 6.0 | 6.0.0 → < 6.0.6003.21167 | 6.0.6003.21167 |
| Windows Server 2008 Service Pack 2 (Server Core installation) 6.0 | 6.0.0 → < 6.0.6003.21167 | 6.0.6003.21167 |
Show the 8 other branches Hide the 8 other branches
| Product | Affected versions | Fixed in |
|---|---|---|
| Windows Server 2008 Service Pack 2 6.0 | 6.0.0 → < 6.0.6003.21167 | 6.0.6003.21167 |
| Windows Server 2008 R2 Service Pack 1 6.1 | 6.1.0 → < 6.1.7601.25661 | 6.1.7601.25661 |
| Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.0 | 6.0.0 → < 6.1.7601.25661 | 6.1.7601.25661 |
| Windows Server 2012 6.2 | 6.2.0 → < 6.2.9200.23409 | 6.2.9200.23409 |
| Windows Server 2012 (Server Core installation) 6.2 | 6.2.0 → < 6.2.9200.23409 | 6.2.9200.23409 |
| Windows Server 2012 R2 6.3 | 6.3.0 → < 6.3.9600.20069 | 6.3.9600.20069 |
| Windows Server 2012 R2 (Server Core installation) 6.3 | 6.3.0 → < 6.3.9600.20069 | 6.3.9600.20069 |
| Windows Server version 20H2 10.0 | 10.0.0 → < 10.0.19041.1110 | 10.0.19041.1110 |
References
- portal.msrc.microsoft.com portal.msrc.microsoft.com
- [oss-security] 20211110 Fwd: Samba 4.15.2, 4.14.10, 4.13.14 Security Releases are available for Download www.openwall.com
- GLSA-202309-06 security.gentoo.org
Timeline
- Published
- Last modified
Other CVEs of Windows Server 2019
The 5745 CVEs of Windows Server 2019 →
CVE-2026-108471
Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to…
8.8
High
CVE-2026-108136
Use after free in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally
7.8
High
CVE-2026-108129
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network
6.5
Medium
CVE-2026-108132
Double free in Windows Kerberos allows an authorized attacker to elevate privileges locally
7.0
High