From: "Daniel P. Berrangé" <berrange@redhat.com>
To: qemu-devel@nongnu.org
Cc: "Markus Armbruster" <armbru@redhat.com>,
"Michael Roth" <michael.roth@amd.com>,
"Konstantin Kostiuk" <kkostiuk@redhat.com>,
"Daniel P. Berrangé" <berrange@redhat.com>
Subject: [PATCH 11/14] qga: mark guest-file-* commands with 'unrestricted' flag
Date: Tue, 4 Jun 2024 16:32:39 +0100 [thread overview]
Message-ID: <20240604153242.251334-12-berrange@redhat.com> (raw)
In-Reply-To: <20240604153242.251334-1-berrange@redhat.com>
This blocks use of all the 'guest-file-*' commands unless the QGA is run
with the --unrestricted command line argument.
These commands allow the host admin to read and write arbitrary guest
files and so directly compromise the guest OS.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
qga/qapi-schema.json | 48 ++++++++++++++++++++++++++++++++++++++------
1 file changed, 42 insertions(+), 6 deletions(-)
diff --git a/qga/qapi-schema.json b/qga/qapi-schema.json
index de7c1de0b7..2f80d89536 100644
--- a/qga/qapi-schema.json
+++ b/qga/qapi-schema.json
@@ -283,11 +283,17 @@
#
# Returns: Guest file handle
#
+# Features:
+#
+# @unrestricted: not permitted if agent disables unrestricted
+# resource access mode
+#
# Since: 0.15.0
##
{ 'command': 'guest-file-open',
'data': { 'path': 'str', '*mode': 'str' },
- 'returns': 'int' }
+ 'returns': 'int',
+ 'features': [ 'unrestricted' ] }
##
# @guest-file-close:
@@ -296,10 +302,16 @@
#
# @handle: filehandle returned by guest-file-open
#
+# Features:
+#
+# @unrestricted: not permitted if agent disables unrestricted
+# resource access mode
+#
# Since: 0.15.0
##
{ 'command': 'guest-file-close',
- 'data': { 'handle': 'int' } }
+ 'data': { 'handle': 'int' },
+ 'features': [ 'unrestricted' ] }
##
# @GuestFileRead:
@@ -332,11 +344,17 @@
#
# Returns: @GuestFileRead
#
+# Features:
+#
+# @unrestricted: not permitted if agent disables unrestricted
+# resource access mode
+#
# Since: 0.15.0
##
{ 'command': 'guest-file-read',
'data': { 'handle': 'int', '*count': 'int' },
- 'returns': 'GuestFileRead' }
+ 'returns': 'GuestFileRead',
+ 'features': [ 'unrestricted' ] }
##
# @GuestFileWrite:
@@ -367,11 +385,17 @@
#
# Returns: @GuestFileWrite
#
+# Features:
+#
+# @unrestricted: not permitted if agent disables unrestricted
+# resource access mode
+#
# Since: 0.15.0
##
{ 'command': 'guest-file-write',
'data': { 'handle': 'int', 'buf-b64': 'str', '*count': 'int' },
- 'returns': 'GuestFileWrite' }
+ 'returns': 'GuestFileWrite',
+ 'features': [ 'unrestricted' ] }
##
@@ -434,12 +458,18 @@
#
# Returns: @GuestFileSeek
#
+# Features:
+#
+# @unrestricted: not permitted if agent disables unrestricted
+# resource access mode
+#
# Since: 0.15.0
##
{ 'command': 'guest-file-seek',
'data': { 'handle': 'int', 'offset': 'int',
'whence': 'GuestFileWhence' },
- 'returns': 'GuestFileSeek' }
+ 'returns': 'GuestFileSeek',
+ 'features': [ 'unrestricted' ] }
##
# @guest-file-flush:
@@ -448,10 +478,16 @@
#
# @handle: filehandle returned by guest-file-open
#
+# Features:
+#
+# @unrestricted: not permitted if agent disables unrestricted
+# resource access mode
+#
# Since: 0.15.0
##
{ 'command': 'guest-file-flush',
- 'data': { 'handle': 'int' } }
+ 'data': { 'handle': 'int' },
+ 'features': [ 'unrestricted' ] }
##
# @GuestFsfreezeStatus:
--
2.45.1
next prev parent reply other threads:[~2024-06-04 15:34 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-06-04 15:32 [PATCH 00/14] Improve mechanism for configuring allowed commands Daniel P. Berrangé
2024-06-04 15:32 ` [PATCH 01/14] qapi: use "QAPI_FEATURE" as namespace for special features Daniel P. Berrangé
2024-06-04 15:32 ` [PATCH 02/14] qapi: add helper for checking if a command feature is set Daniel P. Berrangé
2024-06-04 15:32 ` [PATCH 03/14] qapi: cope with special feature names containing a '-' Daniel P. Berrangé
2024-07-12 7:54 ` Markus Armbruster
2024-06-04 15:32 ` [PATCH 04/14] qapi: add a 'command-features' pragma Daniel P. Berrangé
2024-07-12 8:07 ` Markus Armbruster
2024-07-12 8:12 ` Daniel P. Berrangé
2024-07-12 8:50 ` Markus Armbruster
2024-07-12 9:17 ` Daniel P. Berrangé
2024-07-16 18:08 ` Markus Armbruster
2024-07-17 10:46 ` Daniel P. Berrangé
2024-07-17 11:43 ` Markus Armbruster
2024-06-04 15:32 ` [PATCH 05/14] qapi: stop hardcoding list of special features Daniel P. Berrangé
2024-06-04 15:32 ` [PATCH 06/14] qapi: define enum for custom special features on commands Daniel P. Berrangé
2024-06-04 15:32 ` [PATCH 07/14] qga: use special feature to mark those that can run when FS are frozen Daniel P. Berrangé
2024-06-04 15:32 ` [PATCH 08/14] qga: add command line to limit commands for confidential guests Daniel P. Berrangé
2024-06-04 15:32 ` [PATCH 09/14] qga: define commands which can be run in confidential mode Daniel P. Berrangé
2024-06-04 15:32 ` [PATCH 10/14] qga: add command line to block unrestricted command/file access Daniel P. Berrangé
2024-06-04 15:32 ` Daniel P. Berrangé [this message]
2024-06-04 15:32 ` [PATCH 12/14] qga: mark guest-exec-* commands with 'unrestricted' flag Daniel P. Berrangé
2024-06-04 15:32 ` [PATCH 13/14] qga: add command line to block user authentication commands Daniel P. Berrangé
2024-06-04 15:32 ` [PATCH 14/14] qga: mark guest-ssh-* / guest-*-password commands with 'unrestricted' flag Daniel P. Berrangé
2024-07-02 18:09 ` [PATCH 00/14] Improve mechanism for configuring allowed commands Daniel P. Berrangé
2024-07-15 9:52 ` Markus Armbruster
2024-07-15 10:56 ` Daniel P. Berrangé
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