Enable-NTFSAuditInheritance, Disable-NTFSAuditInheritance, and
Set-NTFSInheritance -AuditInheritanceEnabled failed with "(5) Access is
denied" for a file or folder without a SACL, also elevated with the
Security privilege. The cmdlets read only the audit section and changed
the flag that disables or enables audit inheritance. AlphaFS writes that
flag only together with a SACL, so it wrote no section at all, which
Windows denies; the retry as owner repeated the same write. An empty SACL
is now added first, but only to a descriptor that was read with its SACL.
The elevated CI runs of #100 to #106 showed this through the test of an
omitted -AccessInheritanceEnabled. From #104 on, the test that keeps the
inherited entries of a security descriptor failed as well: elevated,
Get-NTFSSecurityDescriptor reads the SACL, and Windows then returns a DACL
that isn't in the auto-inherit format, such as that of a file in the temp
folder of the user, without its inherited flags. The test now reads the
access section only and checks that the descriptor has inherited entries.
Tests: five cases for items without audit entries, red with "Access is
denied" before the fix; the test that keeps the explicit audit entries now
checks the errors and the inheritance state of both calls; a test checks
that a descriptor read without its audit entries gets no SACL, which would
replace the audit entries of the item when it is written.
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The fix for #17 stopped adding Synchronize to an Allow rule with generic
rights, which bypassed the exact match of FileSystemSecurity.RemoveAccessRule:
-AccessRights GenericAll left a Synchronize-only entry behind when the entry
also had Synchronize. RemoveRule now does what FileSystemSecurity does,
without its validation: it removes a rule that matches an entry exactly as it
is, and otherwise without Synchronize. It covers every mask that .NET
rejects, not only the generic rights. The tests cover -RemoveSpecific, a
Deny entry, a partial generic mask, and that nothing else is removed.
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FileSystemSecurity.RemoveAccessRule rebuilds a rule that doesn't match an
entry exactly and rejects generic rights then, so removing an entry with
GENERIC_ALL failed with "The value '269484032' is not valid". Windows keeps
generic rights in the inherit-only entries of folders. Such a rule is now
removed through ModifyAccessRule, without the added Synchronize right
(#17).
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Get-FileHash2 failed in PowerShell 7 for every algorithm, because the hash
method referenced RIPEMD160, which .NET Core and later lack. RIPEMD160 and
MACTripleDES are now created by name; requesting one where .NET lacks it
stops the cmdlet with an error that names the algorithm and points to
Windows PowerShell 5.1. MACTripleDES uses a random key, so its result
differs on every call; the value is deprecated, and the cmdlet warns when
it is used.
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Write orphaned audit entries outside the read error handler, so that a
stopped pipeline isn't reported as a read error. Pass -RemoveSpecific
through the string path overload of RemoveFileSystemAuditRule, and state
on the Get-NTFSSimpleAccess page that the security descriptor of a file
is reported.
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Defect 17. Both cmdlets carried a removeSpecific field that no parameter
set, so they always took the rights away from matching entries; the
version history documents a -RemoveSpecific switch since 4.1. Both
cmdlets now have the switch, which removes only an entry that matches
exactly. The Security2 list overloads didn't pass the flag on, and the
audit item overload didn't support it; all overloads now do.
The applies-to field of both cmdlets is initialized; -AppliesTo is
mandatory in the Simple sets since defect 14, so it is always set when
used.
Tests: Access.Tests.ps1 3 tests, Audit.Tests.ps1 2 tests, on in-memory
security descriptors.
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Defect 15, all three parts:
- -ExcludeNoneAccessEntries had no effect: the result was written in a
finally block, so "continue" didn't skip it, and the check compared the
rights with None although .NET adds Synchronize to every allow rule. A
result is now written only after the checks, and Synchronize alone
counts as no access.
- Without -Path, BeginProcessing tested the path list for null, which it
never is, so the cmdlet wrote nothing. It now uses the current location,
like the other cmdlets.
- ProcessRecord ignored the SecurityDescriptor parameter set. A new
EffectiveAccess overload computes the effective access from an
in-memory security descriptor; the item overload uses it.
The Security privilege state that selects the error message was read into
a local variable that hid the field; the field is now set.
Tests/Access.Tests.ps1: 4 tests.
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Defect 8. For a security descriptor that was read without its SACL (no
Security privilege), Get-NTFSInheritance -SecurityDescriptor reported
AuditInheritanceEnabled as $true, because the protection flag of a
section that was never read is not set. It now reports $null, like the
Path parameter set, using the sections that FileSystemSecurity2 records
since defect 4.
Set-NTFSInheritance -SecurityDescriptor reads the same state, so it no
longer skips a requested audit change on such a descriptor as "equal".
Tests/Inheritance.Tests.ps1: 2 tests.
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Defect 7. FileSystemAuditRule2.GetFileSystemAuditRules set the
InheritanceEnabled property of every audit entry from
AreAccessRulesProtected, the protection of the DACL. It now uses
AreAuditRulesProtected, so the property, and the "Inheritance enabled"
header of the audit view, describe the audit entries.
Tests/Audit.Tests.ps1: 1 test on an in-memory security descriptor whose
SACL is protected and whose DACL is not.
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Defect 4, both parts:
- Get-NTFSAudit kept the entries of the previous item and wrote them in a
finally block, so a path whose security descriptor failed to read
returned the previous item's entries again. Each item now starts empty,
and entries are written only after a successful read.
- Without the Security privilege, the cmdlet read the descriptor without
its SACL and returned nothing, like an item without audit entries. It
now reads the SACL alone, so a missing privilege is a ReadSecurityError
("A required privilege is not held by the client"). A descriptor from
Get-NTFSSecurityDescriptor that was read without the SACL gets the same
error; FileSystemSecurity2 now records which sections it read
(internal, visible to NTFSSecurity).
Tests/Audit.Tests.ps1 (new): 3 tests. The repeat test needs the Security
privilege to add an audit entry and runs in CI.
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- Require Windows PowerShell 5.1 or PowerShell 7 (PowerShellVersion
5.1, which CompatiblePSEditions needs) and .NET Framework 4.5.2, and
use RootModule instead of the deprecated ModuleToProcess. Before,
Test-ModuleManifest, and with it Publish-Module, failed.
- Export exactly the 36 cmdlets: remove Show-NTFSSimpleAccess, which no
longer exists, and the duplicate inheritance cmdlets.
- Keep -PassThur, the name in 4.2.6 and earlier, as an alias of
Remove-Item2 -PassThru, deprecated in the changelog.
- Set version 5.0.0 in the manifest, in NTFSSecurity, Security2, and
PrivilegeControl, and in a new 5.0.0 section of CHANGELOG.md.
- Tests/Manifest.Tests.ps1 and Tests/Remove-Item2.Tests.ps1 guard the
manifest, the versions, and the alias.
BREAKING CHANGE: the module requires Windows PowerShell 5.1 or
PowerShell 7; the manifest no longer claims PowerShell 2.0.
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Raimund Andree
Jan-Hendrik Peters [MSFT]
Raimund Andée