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Domain Admins w/ Ownership of CA Host Object Is Not a Risk! #231

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merged 2 commits into from
Feb 22, 2025
Merged

Domain Admins w/ Ownership of CA Host Object Is Not a Risk! #231

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f98d62a
Resolves Issue #225
Feb 22, 2025
5dbd221
Merge branch 'main' into 225-esc5-flags-domain-admins-as-security-risk
SamErde Feb 22, 2025
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17 changes: 13 additions & 4 deletions Invoke-Locksmith.ps1
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Original file line number Diff line number Diff line change
Expand Up @@ -1164,7 +1164,15 @@ function Find-ESC5 {
}

$IssueDetail = ''
if ( ($_.objectClass -ne 'pKICertificateTemplate') -and ($SID -notmatch $SafeOwners) ) {
$DangerousOwner = $false
if ( ($_.objectClass -eq 'computer') -and ($SID -match '-512$') ) {
$DangerousOwner = $false
}
elseif ( ($_.objectClass -ne 'pKICertificateTemplate') -and ($SID -notmatch $SafeOwners) ) {
$DangerousOwner = $true
}

if ($DangerousOwner) {
switch ($_.objectClass) {
container {
$IssueDetail = @"
Expand All @@ -1177,7 +1185,8 @@ CA objects, new templates, new OIDs, etc. to create novel escalation paths.
$IssueDetail = @"
This computer is hosting a Certification Authority (CA).

There is no reason for anyone other than AD Admins to have own CA host objects.
There is no reason for anyone other than Enterprise Admins or Domain Admins to
own CA host objects.
"@
}
'msPKI-Cert-Template-OID' {
Expand All @@ -1197,7 +1206,7 @@ Ownership rights can be used to enable currently disabled templates.

If this prinicpal also has control over a disabled certificate template (aka ESC4),
they could modify the template into an ESC1 template and enable the certificate.
This ensabled certificate could be use for privilege escalation and persistence.
This enabled certificate could be use for privilege escalation and persistence.
"@
}
}
Expand Down Expand Up @@ -4381,7 +4390,7 @@ function Invoke-Locksmith {
[System.Management.Automation.PSCredential]$Credential
)

$Version = '2025.1.14'
$Version = '2025.2.22'
$LogoPart1 = @'
_ _____ _______ _ _ _______ _______ _____ _______ _ _
| | | | |____/ |______ | | | | | |_____|
Expand Down
2 changes: 1 addition & 1 deletion Locksmith.psd1
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Original file line number Diff line number Diff line change
Expand Up @@ -8,7 +8,7 @@
FunctionsToExport = 'Invoke-Locksmith'
GUID = 'b1325b42-8dc4-4f17-aa1f-dcb5984ca14a'
HelpInfoURI = 'https://raw.githubusercontent.com/jakehildreth/Locksmith/main/en-US/'
ModuleVersion = '2025.1.14'
ModuleVersion = '2025.2.22'
PowerShellVersion = '5.1'
PrivateData = @{
PSData = @{
Expand Down
14 changes: 11 additions & 3 deletions Private/Find-ESC5.ps1
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Original file line number Diff line number Diff line change
Expand Up @@ -87,7 +87,14 @@
}

$IssueDetail = ''
if ( ($_.objectClass -ne 'pKICertificateTemplate') -and ($SID -notmatch $SafeOwners) ) {
$DangerousOwner = $false
if ( ($_.objectClass -eq 'computer') -and ($SID -match '-512$') ) {
$DangerousOwner = $false
} elseif ( ($_.objectClass -ne 'pKICertificateTemplate') -and ($SID -notmatch $SafeOwners) ) {
$DangerousOwner = $true
}

if ($DangerousOwner) {
switch ($_.objectClass) {
container {
$IssueDetail = @"
Expand All @@ -100,7 +107,8 @@ CA objects, new templates, new OIDs, etc. to create novel escalation paths.
$IssueDetail = @"
This computer is hosting a Certification Authority (CA).

There is no reason for anyone other than AD Admins to have own CA host objects.
There is no reason for anyone other than Enterprise Admins or Domain Admins to
own CA host objects.
"@
}
'msPKI-Cert-Template-OID' {
Expand All @@ -120,7 +128,7 @@ Ownership rights can be used to enable currently disabled templates.

If this prinicpal also has control over a disabled certificate template (aka ESC4),
they could modify the template into an ESC1 template and enable the certificate.
This ensabled certificate could be use for privilege escalation and persistence.
This enabled certificate could be use for privilege escalation and persistence.
"@
}
}
Expand Down