Add events for the following resource name parsing issues:
- name truncated as its too long
- maximum number of labels reached
- infinite loop
Currently these events are only registered when encountered, but
recoverable. That is where we are able to return some of the name,
usually in a truncated state.
As name parsing has many code paths, we pass in a pointer to a flag
field that can be updated by the name parser, this is done in
addition to the flags being set on a specific name as when logging we
want to designate which fields are truncated, etc. But for alerts, we
just care that something happened during the parse. It also reduces
errors as it won't be forgotten to check for the flags and set the
event if some new parser is written that also parses names.
Ticket: #7280
Once a name has gone over 1025 chars it will be truncated to 1025
chars and no more labels will be added to it, however the name will
continue to be parsed up to the label limit in attempt to find the end
so parsing can continue.
This introduces a new struct, DNSName which contains the name and any
flags which indicate any name parsing errors which should not error
out parsing the complete message, for example, infinite recursion
after some labels are parsed can continue, or truncation of name where
compression was used so we know the start of the next data to be
parsed.
This limits the logged DNS messages from being over our maximum size
of 10Mb in the case of really long names.
Ticket: #7280
Ticket: 7393
Check if GrowRegionToSize is called with an argument
trying to shrink the region size, and if so do nothing,
ie do not try to shrink, and just return ok.
This way, we avoid a buffer overflow from memeset using an
unsigned having underflowed.
Ticket: 7393
As it was possible before earlier patches to get here
with mem_size lesser than start->buf_size,
which caused then an unsigned underflow and a buffer overflow.
This was not a problem for current callers in Suricata,
as RegionsIntersect is only called through StreamingBufferInsertAt
which is only used by TCP...
And TCP uses default region gap = 256kb, and only calls
StreamingBufferInsertAt with a u16, so TCP never inserts a new
data that will strictly contain an existing region augmented
with region gap, which was the only case where RegionsIntersect
returned the wrong result, which could later lead to a
buffer overflow.
Ticket: 7393
Last packet from the TLS TCP session moves TCP state to CLOSED.
This flags the app-layer with APP_LAYER_PARSER_EOF_TS or
APP_LAYER_PARSER_EOF_TC depending on the direction of the final packet.
This flag will just have been set in a single direction.
This leads to the last packet updating the inspect id in that packets
direction.
At the end of the TLS session a pseudo packet is created, because:
- flow has ended
- inspected tx id == 0, for at least one direction
- total txs is 1
Then a packet rule matches:
```
alert tcp any any -> any 443 (flow: to_server; \
flowbits:isset,tls_error; \
sid:09901033; rev:1; \
msg:"Allow TLS error handling (outgoing packet)"; )
```
The `SIG_MASK_REQUIRE_REAL_PKT` is not preventing the match, as the
`flowbits` keyword doesn't set it.
To avoid this match. This patch skips signatures of the `SIG_TYPE_PKT`
for flow end packets.
Ticket: #7318.
Ticket: 7199
Uses a config parameter detect.guess-applayer-tx to enable
this behavior (off by default)
This feature is requested for use cases with signatures not
using app-layer keywords but still targetting application
layer transactions, such as pass/drop rule combination,
or lua usage.
This overrides the previous behavior of checking if the signature
has a content match, by checking if there is only one live
transaction, in addition to the config parameter being set.
ICE driver (Intel E810 NIC) requires/supports 52-byte long RSS key.
The 52 byte key length was mandatory from DPDK 23.11 when Suricata
was starting with independently configured ice PMD.
However, Suricata failed to start when ice PMD was part of
net_bonding PMD, requiring 52 byte RSS key even in DPDK versions
lower than 23.11. Since the support for the longer key is present
since DPDK 19.11 the key is set to 52 bytes for all versions.
Ticket: 7444
To optimize detection, and logging, to avoid going through
all the live transactions when only a few were modified.
Two boolean fields are added to the tx data: updated_tc and ts
The app-layer parsers are now responsible to set these when
needed, and the logging and detection uses them to skip
transactions that were not updated.
There may some more optimization remaining by when we set
both updated_tc and updated_ts in functions returning
a mutable transaction, by checking if all the callers
are called in one direction only (request or response)
Ticket: 7087
In multi instance flow manager setups, each flow manager gets a slice
of the hash table to manage. Due to a logic error in the chunked
scanning of the hash slice, instances beyond the first would always
rescan the same (first) subslice of their slice.
The `pos` variable that is used to keep the state of what the starting
position for the next scan was supposed to be, was treated as if it held
a relative value. Relative to the bounds of the slice. It was however,
holding an absolute position. This meant that when doing it's bounds
check it was always considered out of bounds. This would reset the sub-
slice to be scanned to the first part of the instances slice.
This patch addresses the issue by correctly handling the fact that the
value is absolute.
Bug: #7365.
Fixes: e9d2417e0f ("flow/manager: adaptive hash eviction timing")
Similar keywords use `isnotset`, while `flowint` only accepted `notset`
Opted to change the code, not only the regex, to keep the underlying
code also following the same patterns.
Task #7426
Default decoder event alert was very sparse, not even logging packet
type and pcap_cnt. Expand support for this record type. It will be more
useful with the ethernet headers and packet field, but these are still
disabled by default.
Ticket: #7433.
Ticket: 7311
If response_status_number is not a valid poisitive integer,
we should not try to parse it again, and fail again,
but just log the raw string.
Threads are initialized sequentially to allow for a predictable mapping
of threads and queues. Not all parts of the start up need to be done
sequentially. The setting up of the rings can be very expensive, taking
of a couple of hundred milliseconds. The ring setup doesn't need to be
done sequentially though.
This patch releases the thread early, after bind but before the ring
setups.
Ticket: #7272.
For example, "requires: foo bar" is an unknown requirement, however
its not tracked, nor an error as it follows the syntax. Instead,
record these unknown keywords, and fail the requirements check if any
are present.
A future version of Suricata may have new requires keywords, for
example a check for keywords.
Ticket: #7418
Flags are:
- unittests
- suricata-verify
- pcap
- livemode
- fuzzcorpus
This should make sure codecov only adds its report after receiving
the results for each of the flags.
This prevents the clippy warning:
508 | #[derive(FromPrimitive, Debug)]
| ^------------
| |
| `FromPrimitive` is not local
| move the `impl` block outside of this constant `_IMPL_NUM_FromPrimitive_FOR_IsakmpPayloadType`
509 | pub enum IsakmpPayloadType {
| ----------------- `IsakmpPayloadType` is not local
|
= note: the derive macro `FromPrimitive` defines the non-local `impl`, and may need to be changed
= note: the derive macro `FromPrimitive` may come from an old version of the `num_derive` crate, try updating your dependency with `cargo update -p num_derive`
= note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl`
= note: items in an anonymous const item (`const _: () = { ... }`) are treated as in the same scope as the anonymous const's declaration for the purpose of this lint
= note: this warning originates in the derive macro `FromPrimitive` (in Nightly builds, run with -Z macro-backtrace for more info)
In the situation where the mem buffer cannot be expanded to the
requested size, drop the log message.
For each JSON log context, a warning will be emitted once with a partial
bit of the log record being dropped to identify what event types may be
leading to large log records.
This also fixes the call to MemBufferExpand which is supposed be
passed the amount to expand by, not the new size required.
Ticket: #7300
Ticket: 2224
It takes an argument to match only if the buffer is absent,
or it can still match if the buffer is present, but we test
the absence of some content.
For multi buffers, absent matches if there are 0 buffers.
For file keywords, absent matches if there is no file.
- DetectEngineInspectBufferHttpHeader is only used with ALPROTO_HTTP1
- engine->progress should be HTP_REQUEST_HEADERS or HTP_RESPONSE_HEADERS based on the direction
Victor Julien
Jason Ish
Philippe Antoine
Lukas Sismis
Juliana Fajardini
dependabot[bot]
Nancy Enos