Kerberos KDC Security Feature Bypass Vulnerability
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 10.0.17763.2061, 10.0.19041.1110, 10.0.14393.4530, 6.0.6003.21167, 6.1.7601.25661, and 2 more
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: total
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: total
- Record last updated
- EPSS reached 10%
FIRST estimates at least a 10% chance of exploitation in the next 30 days
Affected versions
- Microsoft Windows Server 2019
From 10.0.0 · fixed in 10.0.17763.2061
- Microsoft Windows Server 2019 (Server Core installation)
From 10.0.0 · fixed in 10.0.17763.2061
- Microsoft Windows Server, version 1909 (Server Core installation)
From 10.0.0
- Microsoft Windows Server, version 1903 (Server Core installation)
From 10.0.0
- Microsoft Windows Server version 2004
From 10.0.0 · fixed in 10.0.19041.1110
- Microsoft Windows Server 2016
From 10.0.0 · fixed in 10.0.14393.4530
- Microsoft Windows Server 2016 (Server Core installation)
From 10.0.0 · fixed in 10.0.14393.4530
- Microsoft Windows Server 2008 Service Pack 2
From 6.0.0 · fixed in 6.0.6003.21167
- Microsoft Windows Server 2008 Service Pack 2 (Server Core installation)
From 6.0.0 · fixed in 6.0.6003.21167
- Microsoft Windows Server 2008 Service Pack 2
From 6.0.0 · fixed in 6.0.6003.21167
- Microsoft Windows Server 2008 R2 Service Pack 1
From 6.1.0 · fixed in 6.1.7601.25661
- Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation)
From 6.0.0 · fixed in 6.1.7601.25661
- Microsoft Windows Server 2012
From 6.2.0 · fixed in 6.2.9200.23409
- Microsoft Windows Server 2012 (Server Core installation)
From 6.2.0 · fixed in 6.2.9200.23409
- Microsoft Windows Server 2012 R2
From 6.3.0 · fixed in 6.3.9600.20069
- Microsoft Windows Server 2012 R2 (Server Core installation)
From 6.3.0 · fixed in 6.3.9600.20069
- Microsoft Windows Server version 20H2
From 10.0.0 · fixed in 10.0.19041.1110