CVE-2020-17049HighMicrosoft CVSS 6.6CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Microsoft security update for CVE-2020-17049 — Windows

Published
November 10, 2020
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2020-17049 →

📋 Microsoft's advisory

EchelonGraph does not copy Microsoft's advisory page: its FAQ and remediation text are not shown here. Read the advisory on https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-17049. This page also shows what EchelonGraph holds for CVE-2020-17049, with the description from its CVE record, which the CVE Numbering Authority that assigned the CVE wrote: for a CVE Microsoft assigned, often in the words of Microsoft's own advisory.

🎯 Affected products18

  • Windows Server 2008 R2 for x64-based Systems Service Pack 1
  • Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
  • Windows Server 2008 for 32-bit Systems Service Pack 2
  • Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
  • Windows Server 2008 for x64-based Systems Service Pack 2
  • Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
  • Windows Server 2012
  • Windows Server 2012 (Server Core installation)
  • Windows Server 2012 R2
  • Windows Server 2012 R2 (Server Core installation)
  • Windows Server 2016
  • Windows Server 2016 (Server Core installation)
  • Windows Server 2019
  • Windows Server 2019 (Server Core installation)
  • Windows Server, version 1903 (Server Core installation)
  • Windows Server, version 1909 (Server Core installation)
  • Windows Server, version 2004 (Server Core installation)
  • Windows Server, version 20H2 (Server Core Installation)

✅ Updates Microsoft lists: 13 KB articles

13 rows: one per KB article or update, update type and fixed build. Their details are on Microsoft's advisory.

KB articleUpdateFixed build
KB5004244Security Update10.0.17763.2061
KB5001337Security Update—
KB4592449Security Update—
KB5004237Security Update10.0.19041.1110
KB5004238Security Update10.0.14393.4530
KB5004305Monthly Rollup6.0.6003.21167
KB5004299Security Only6.0.6003.21167
KB5004289Monthly Rollup6.1.7601.25661
KB5004307Security Only6.1.7601.25661
KB5004294Monthly Rollup6.2.9200.23409
KB5004302Security Only6.2.9200.23409
KB5004298Monthly Rollup6.3.9600.20069
KB5004285Security Only6.3.9600.20069

🧭 EchelonGraph on CVE-2020-17049

EchelonGraph score
7.2 HIGH
CISA KEV
Not listed
Fix status
A fix is available — apply it.

Description from the CVE record (CVE.org), as published by its numbering authority

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.

Published by Microsoft Corporation, the CVE Numbering Authority that assigned CVE-2020-17049, in its CVE record at CVE.org; reused under the CVE Program's Terms of Use (its licence and MITRE's copyright notice are in our Terms of Service).

🔗 References (27)