The smb dce_opnum matches all the opnums that are higher that the
indicated opnum. This is due the range comparison if was put in the
exact comparison context, and in case the opnum doesn't match exactly,
then the range comparison is triggered (the upper limit is always true).
Move the erroneus if to the outer context, as else option of the block
checks if comparison should be exact or range.
Ticket: 4767
The smb dce_opnum keyword doesn't match the dcerpc requests/responses.
This occurs because in the rs_smb_tx_match_dce_opnum function, the
x.req_cmd is matched against the erroneous code 1. Fix this by using
DCERPC_TYPE_REQUEST for the comparison instead.
Ticket: 4767
The bug:
The dcerpc dce_iface keyword just match the packet following the bind. Only the
next request after the rpc is sent will match. However the expected behaviour it
that all the rpc requests/responses sent under the context of the given
interface would match.
In the Open Group c706 the following is indicated:
In 2.2.1 Binding-related Operations, indicates that one category of binding
operations are those that "operations that establish internal call routing
information for the server." (The other are to establish the protocol which is
not relevant here). And the following statement can be found:
Operations in the second category establish a set of mappings that the server
can use to route calls internally to the appropriate manager routine. This
routing is based on the interface and version, operation and any object
requested by the call.
It indicates that server routes (to call methods) are based on the operation,
interface and object.
- Operation: To indicate the method to call, and operation number is
specified as indicated in the second step of 2.3.3.2 (Client
Binding Steps).
- Interface: An interface is a set of remotely callable operations offered by a
server and invokable by clients. (2.1.1.1)
- Object: Is the manager that implements the interface, as stated in section
Interface and Manager Selection of 2.3.3.3. It is not mandatory, can
be nil.
To call a method, a client must send a request message as defined in 2.6.4.9,
that contains these identifiers:
- opnum: The opnum field identifies the operation being invoked within the
interface.
- p_cont_id (Context ID in Wireshark): The p_cont_id field holds a presentation
context identifier that identifies the
data representation and interface, as
defined in 12.6.3.4 (Context Identifiers).
- object: The object field is contained if the PFC_OBJECT_UUID is set. (Could be
interesting to create a keyword dce_object for matching this UUID)
Therefore, to get the correct method to invoke, the server must map the context
to the correct interface. This is negotiated by the bind request
Interfaces are first negotiated using the bind message (12.6.4.3), contained in
the p_context_elem array. Then they are accepted or rejected using the bind_ack
message (12.6.4.4).
Once these contexts are established, both client and server can use the context
id, which is the index of the p_context_elem array, to refer the interface they
are using.
Moreover, in the middle of the connection, the context can be changed with the
alter_context message.
This is way suricata shouldn't delete the bindack attribute, that contains
the contexts, used by match_backuuid. This is the only way to know the interface
a request message is referring to.
ticket: 4769
https://redmine.openinfosecfoundation.org/issues/4769
Pgsql was using bitwise operations to assign password output config to
its context flags, but mixing that with logic negation of the default
value, resulting in the expressions having a constant value as result.
Bug: #5007
When running with privilege dropping, the application log file
is opened before privileges are dropped resulting in Suricata
failing to re-open the file for file rotation.
If needed, chown the application to the run-as user/group after
opening.
Ticker #4523
Initialize the run-as user info after loading the config, but
before setting up logging (previously it was done while initializing
signal handlers). This will allow the log file to be given the
correct permissions if Suricata is configured to run as a non-root
user.
- add nom parsers for decoding most messages from StartupPhase and
SimpleQuery subprotocols
- add unittests
- tests/fuzz: add pgsql to confyaml
Feature: #4241
As is done for other targets,
so that all app-layer protocols are enabled,
even the ones disabled by default such as enip
And resets protocol detection every time we try
so that probing_parser_toserver_alproto_masks are fresh.
Always use the same path for default-rule-path whether or not
Suricata-Update will be installed as part of the Suricata install or
not.
This provides consistency, and maps better to our recommendation that
Suricata-Update be used to manage rules.
Probably should have been done as part of
55852d0de3.
Ticket #4912.
Eloy Pérez González
Juliana Fajardini
Jason Ish
Lukas Sismis
Pierre Chifflier
Philippe Antoine
Catena cyber
Shivani Bhardwaj
Victor Julien
Emmanuel Thompson
Andreas Dolp
Sam Muhammed