Jason Ish [Fri, 10 Jul 2020 19:19:35 +0000 (13:19 -0600)]
script/dnp3-gen: update generator to reflect in tree changes
Some changes were made to the generated files instead of the
generator script. Update the script to generate what is
in the current state of the in-tree generated files.
Angelo Mirabella [Wed, 11 Mar 2020 15:11:19 +0000 (15:11 +0000)]
unix-socket: fix alert metadata logging
This changeset fixes a bug that was preventing suricata to dump
alert metadata info when running in unix-socket mode.
When running in unix-socket mode, suricata was skipping the
initialization of the output modules and, as a consequence,
the metadata output module was never invoked.
Victor Julien [Mon, 30 Nov 2020 06:44:54 +0000 (07:44 +0100)]
detect: fix inspection order with stateful rules
When stateful detection rules, for which detection has already started
for a previous packet, are added to the candidates array, the array
is sorted to mantain the correct inspection order. However, due to a
trivial error in the sort helper the array was sorted in descending
instead of ascending order.
Jason Ish [Mon, 23 Nov 2020 18:11:42 +0000 (12:11 -0600)]
dnp3: set byte order when logging dnp3 src and dst
DNP3 uses little endian on the wire, for the most part this
is handled as the messages are deserialize. However, the link
header is a cast over raw data, so swap these bytes as they
are being logged.
Victor Julien [Fri, 15 May 2020 07:57:42 +0000 (09:57 +0200)]
smb: fix 'dangling' files in lossy sessions
In case of lossy connections the SMB state would properly clean up
transactions, including file transactions. However for files the
state was never set to 'truncated', leading to files to stay 'active'.
This would lead these files staying in the SMB's state. In long running
sessions with lots of files this would lead to performance and memory
use issues.
This patch cleans truncates the file that was being transmitted when
a file transaction is being closed.
Builds for suricata with rustc 1.24.1 give the warning:
warning: unknown lint: `ellipsis_inclusive_range_patterns`
The builtin lint had been added to fix a deprecation warning
for the `...` range patterns. Although rustc 1.24.1 is
no longer the MSRV, rendering the lint unnecessary, removing it
results in a strict error for rustc 1.47.x.
Builds for suricata fail with rustc 1.24.1 due to usage of `crate`
to specify the absolute path for the app-layer-parser with the errors:
error[E0433]: `crate` can only be used in absolute paths
error: `crate` in paths is experimental
Modify relevant files to use relative paths instead.
Fixes Bug #4064
Philippe Antoine [Tue, 14 Apr 2020 08:30:33 +0000 (10:30 +0200)]
smb: adds file overlap event against evasions
Evasion scenario is
- a first dummy write of one byte at offset 0 is done
- the second full write of EICAR at offset 0 is then done
and does not trigger detection
The last write had the final value, and as we cannot "cancel"
the previous write, we set an event which is then transformed into
an app-layer decoder alert
Jeff Lucovsky [Sat, 19 Sep 2020 12:47:56 +0000 (08:47 -0400)]
detect/rules: Increase array size to remove SEGV
This commit changes the size of reporting variables to be dynamic based
on the buffer ids in use instead of a fixed value to address a SEGV when
the fixed value was less than the max buffer/type id in use.
Victor Julien [Mon, 20 Jul 2020 12:49:59 +0000 (14:49 +0200)]
nfs: fix 'dangling' files in lossy sessions
In case of lossy connections the NFS state would properly clean up
transactions, including file transactions. However for files the
state was never set to 'truncated', leading to files to stay 'active'.
This would lead these files staying in the NFS's state. In long running
sessions with lots of files this would lead to performance and memory
use issues.
This patch cleans truncates the file that was being transmitted when
a file transaction is being closed.
Jeff Lucovsky [Thu, 11 Jun 2020 12:31:55 +0000 (08:31 -0400)]
detect/transform: Add transform "validate" function
This commit adds an (optional) entry for a validation function. The
validation function, if present, will be used during rule processing.
Its role is to determine if the arguments are compatible with the
transform. E.g., a content string of "this string has whitespace" is not
compatible with the `strip_whitespace` transform.
- Fix relative_offset keyword option to be relative in regards to the
last content match
- Change relative_offset to int32_t with bounds check to allow the full
range of the packet buffer size (uint16_t)
- Added checks for over/underflows
- Changed the offset type to uint16_t because the offset is applied to
the payload length, which is a uint16_t
- Adjusted test cases to work relative to the content match
- Added test case to verify bounds
Jason Ish [Fri, 26 Jun 2020 17:45:38 +0000 (11:45 -0600)]
file-hash-common: fix rule_file truncation
Loading file hash lists uses dirname(3) on the
de_ctx->rule_file which modifies the contents,
removing the last part of the path. So on subsequent
calls the rule_file no longer contains the rule_file,
but instead just the directory name.
Mostly noticed when using "-S" with rule files outside
of the default-rule-path which requires more hunting for
the rule file.
Victor Julien [Sun, 5 Apr 2020 12:35:29 +0000 (14:35 +0200)]
decode: cleanup packet properly on bad packets
In case of bad IPv4, TCP or UDP, the per packet ip4vars/tcpvars/udpvar
structures would not be cleaned up because the cleanup depends on the
'header' pointer being set, but the error handling would unset that.
This could mean these structures were already filled with values before
the error was detected. As packets were recycled, the next packet decoding
would use this unclean structure.
To make things worse these structures are part of unions. IPv4/IPv6 and
TCP/ICMPv4/ICMPv6 share the same memory location.
LibFuzzer+UBSAN found this both locally and in Oss-Fuzz:
decode-ipv6.c:654:9: runtime error: load of value 6, which is not a valid value for type 'bool'
#0 0x6146f0 in DecodeIPV6 /src/suricata/src/decode-ipv6.c:654:9
#1 0x617e96 in DecodeNull /src/suricata/src/decode-null.c:70:13
#2 0x9dd8a4 in DecodePcapFile /src/suricata/src/source-pcap-file.c:412:9
#3 0x4c8ed2 in LLVMFuzzerTestOneInput /src/suricata/src/tests/fuzz/fuzz_sigpcap.c:158:25
#4 0x457e51 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:556:15
#5 0x457575 in fuzzer::Fuzzer::RunOne(unsigned char const*, unsigned long, bool, fuzzer::InputInfo*, bool*) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:470:3
#6 0x459917 in fuzzer::Fuzzer::MutateAndTestOne() /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:698:19
#7 0x45a6a5 in fuzzer::Fuzzer::Loop(std::__Fuzzer::vector<fuzzer::SizedFile, fuzzer::fuzzer_allocator<fuzzer::SizedFile> >&) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:830:5
#8 0x448728 in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerDriver.cpp:824:6
#9 0x472552 in main /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerMain.cpp:19:10
#10 0x7ff0d097b82f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
#11 0x41bde8 in _start (/out/fuzz_sigpcap+0x41bde8)
Victor Julien [Fri, 3 Apr 2020 15:03:47 +0000 (17:03 +0200)]
ssl: fix handshake cert buffer sizing
'trec' buffer was not grown properly when it was checked as too small.
After this it wasn't checked again so that copying into the buffer could
overflow it.
Eric Leblond [Fri, 7 Feb 2020 23:05:01 +0000 (00:05 +0100)]
app-layer-expectation: clean expectation and add limits
When a flow timeout, we can have still existing expectations that
are linked to this flow. Given that there is a delay between the
real ending of the flow and its destruction by Suricata, the
expectation should be already honored so we can assume the risk
to clean the expectations that have been triggered by the
to-be-deleted flow.
This patch introduces a limitation in term of number of
expectations attached to one IPPair. This is done using
a circle list so we have a FIFO approach on expectation
handling.
Circleq list code is copied from BSD code like was pre existing code
in queue.h.