kohsuke


Checking for user privileges after conducting basic enumeration

c:\Users\Administrator\.jenkins> whoami /ALL
 
USER INFORMATION
----------------
 
User Name      SID                                        
============== ===========================================
jeeves\kohsuke S-1-5-21-2851396806-8246019-2289784878-1001
 
 
GROUP INFORMATION
-----------------
 
Group Name                           Type             SID          Attributes                                        
==================================== ================ ============ ==================================================
Everyone                             Well-known group S-1-1-0      Mandatory group, Enabled by default, Enabled group
BUILTIN\Users                        Alias            S-1-5-32-545 Mandatory group, Enabled by default, Enabled group
NT AUTHORITY\SERVICE                 Well-known group S-1-5-6      Mandatory group, Enabled by default, Enabled group
CONSOLE LOGON                        Well-known group S-1-2-1      Mandatory group, Enabled by default, Enabled group
NT AUTHORITY\Authenticated Users     Well-known group S-1-5-11     Mandatory group, Enabled by default, Enabled group
NT AUTHORITY\This Organization       Well-known group S-1-5-15     Mandatory group, Enabled by default, Enabled group
NT AUTHORITY\Local account           Well-known group S-1-5-113    Mandatory group, Enabled by default, Enabled group
LOCAL                                Well-known group S-1-2-0      Mandatory group, Enabled by default, Enabled group
NT AUTHORITY\NTLM Authentication     Well-known group S-1-5-64-10  Mandatory group, Enabled by default, Enabled group
Mandatory Label\High Mandatory Level Label            S-1-16-12288                                                   
 
 
PRIVILEGES INFORMATION
----------------------
 
Privilege Name                Description                               State   
============================= ========================================= ========
SeShutdownPrivilege           Shut down the system                      Disabled
SeChangeNotifyPrivilege       Bypass traverse checking                  Enabled 
SeUndockPrivilege             Remove computer from docking station      Disabled
SeImpersonatePrivilege        Impersonate a client after authentication Enabled 
SeCreateGlobalPrivilege       Create global objects                     Enabled 
SeIncreaseWorkingSetPrivilege Increase a process working set            Disabled
SeTimeZonePrivilege           Change the time zone                      Disabled
 
error: Unable to get user claims information.

The kohsuke user is a service account with a membership to the NT AUTHORITY\SERVICE group, running the Jenkins instance for the jeeves web app The user also has SeImpersonatePrivilege enabled. Potato exploit may be leveraged for privilege escalation