Privilege escalation in implementation of Microsoft Kerberos TGT delegation

Published: 2019-02-13 01:39:31 | Updated: 2019-02-13
Severity Low
Patch available YES
Number of vulnerabilities 1
CVE ID N/A
CVSSv3 5.6 [CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N/E:U/RL:W/RC:C]
CWE ID CWE-264
Exploitation vector Network
Public exploit N/A
Vulnerable software Windows
Windows Server
Vulnerable software versions Windows 8.1
Windows 7
Windows 10

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Windows Server 2012
Windows Server 2012 R2
Windows Server 2008

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Vendor URL Microsoft

Security Advisory

1) Permissions, Privileges, and Access Controls

Description

The vulnerability allows a remote attacker to escalate privileges within the domain.

A security issue exists in the way Ticket-Granting Tickets (TGT) are processed within the Active Directory forests.A remote attacker can acquire a TGT from a domain with an inbound trust and use it to escalate privileges within a neighbor forest.

Successful exploitation of the vulnerability requires that TGT delegation is enabled.

Remediation

To resolve this issue Microsoft recommends installing a security patch and disable TGT delegation:
etdom.exe trust fabrikam.com /domain:contoso.com /EnableTGTDelegation:No

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV190006

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