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Fix handling of zero-length SMB2 error responses

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Tim Wojtulewicz 2024-07-24 12:44:46 -07:00
parent 52bcc92e40
commit 2844d54f67
4 changed files with 30 additions and 1 deletions
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2
src/analyzer/protocol/smb/smb2-protocol.pac
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@ -413,7 +413,7 @@ type SMB2_error_response(header: SMB2_Header) = record {
byte_count : uint32; byte_count : uint32;
# This is implemented incorrectly and is disabled for now. # This is implemented incorrectly and is disabled for now.
#error_data : SMB2_error_data(header, byte_count); #error_data : SMB2_error_data(header, byte_count);
stuff : bytestring &restofdata &transient; stuff : bytestring &length=byte_count &transient;
} &byteorder = littleendian; } &byteorder = littleendian;
type SMB2_logoff_request(header: SMB2_Header) = record { type SMB2_logoff_request(header: SMB2_Header) = record {

13
testing/btest/Baseline/scripts.base.protocols.smb.smb2-zero-byte-error-ioctl/out Normal file
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@ -0,0 +1,13 @@
### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
smb2_close_request, [credit_charge=1, status=0, command=6, credits=256, flags=0, message_id=8, process_id=65279, tree_id=3905704575, session_id=66137014, signature=\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00]
smb2_close_response, [credit_charge=1, status=0, command=6, credits=256, flags=1, message_id=8, process_id=65279, tree_id=3905704575, session_id=66137014, signature=\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00], [alloc_size=0, eof=0, times=[modified=0.0, modified_raw=116444736000000000, accessed=0.0, accessed_raw=116444736000000000, created=0.0, created_raw=116444736000000000, changed=0.0, changed_raw=116444736000000000], attrs=[read_only=F, hidden=F, system=F, directory=F, archive=F, normal=F, temporary=F, sparse_file=F, reparse_point=F, compressed=F, offline=F, not_content_indexed=F, encrypted=F, integrity_stream=F, no_scrub_data=F]]
smb2_close_request, [credit_charge=1, status=0, command=6, credits=256, flags=0, message_id=21, process_id=65279, tree_id=900627714, session_id=66137014, signature=\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00]
smb2_close_response, [credit_charge=1, status=0, command=6, credits=256, flags=1, message_id=21, process_id=65279, tree_id=900627714, session_id=66137014, signature=\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00], [alloc_size=0, eof=0, times=[modified=0.0, modified_raw=116444736000000000, accessed=0.0, accessed_raw=116444736000000000, created=0.0, created_raw=116444736000000000, changed=0.0, changed_raw=116444736000000000], attrs=[read_only=F, hidden=F, system=F, directory=F, archive=F, normal=F, temporary=F, sparse_file=F, reparse_point=F, compressed=F, offline=F, not_content_indexed=F, encrypted=F, integrity_stream=F, no_scrub_data=F]]
smb2_close_request, [credit_charge=1, status=0, command=6, credits=256, flags=4, message_id=25, process_id=65279, tree_id=1248644238, session_id=66137014, signature=\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00]
smb2_close_response, [credit_charge=1, status=0, command=6, credits=768, flags=5, message_id=25, process_id=65279, tree_id=1248644238, session_id=66137014, signature=\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00], [alloc_size=0, eof=0, times=[modified=0.0, modified_raw=116444736000000000, accessed=0.0, accessed_raw=116444736000000000, created=0.0, created_raw=116444736000000000, changed=0.0, changed_raw=116444736000000000], attrs=[read_only=F, hidden=F, system=F, directory=F, archive=F, normal=F, temporary=F, sparse_file=F, reparse_point=F, compressed=F, offline=F, not_content_indexed=F, encrypted=F, integrity_stream=F, no_scrub_data=F]]
smb2_close_request, [credit_charge=1, status=0, command=6, credits=256, flags=4, message_id=28, process_id=65279, tree_id=1248644238, session_id=66137014, signature=\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00]
smb2_close_response, [credit_charge=1, status=0, command=6, credits=768, flags=5, message_id=28, process_id=65279, tree_id=1248644238, session_id=66137014, signature=\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00], [alloc_size=0, eof=0, times=[modified=0.0, modified_raw=116444736000000000, accessed=0.0, accessed_raw=116444736000000000, created=0.0, created_raw=116444736000000000, changed=0.0, changed_raw=116444736000000000], attrs=[read_only=F, hidden=F, system=F, directory=F, archive=F, normal=F, temporary=F, sparse_file=F, reparse_point=F, compressed=F, offline=F, not_content_indexed=F, encrypted=F, integrity_stream=F, no_scrub_data=F]]
smb2_close_request, [credit_charge=1, status=0, command=6, credits=256, flags=4, message_id=31, process_id=65279, tree_id=1248644238, session_id=66137014, signature=\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00]
smb2_close_response, [credit_charge=1, status=0, command=6, credits=768, flags=5, message_id=31, process_id=65279, tree_id=1248644238, session_id=66137014, signature=\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00], [alloc_size=0, eof=0, times=[modified=0.0, modified_raw=116444736000000000, accessed=0.0, accessed_raw=116444736000000000, created=0.0, created_raw=116444736000000000, changed=0.0, changed_raw=116444736000000000], attrs=[read_only=F, hidden=F, system=F, directory=F, archive=F, normal=F, temporary=F, sparse_file=F, reparse_point=F, compressed=F, offline=F, not_content_indexed=F, encrypted=F, integrity_stream=F, no_scrub_data=F]]
smb2_close_request, [credit_charge=1, status=0, command=6, credits=256, flags=4, message_id=34, process_id=65279, tree_id=1248644238, session_id=66137014, signature=\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00]
smb2_close_response, [credit_charge=1, status=0, command=6, credits=768, flags=5, message_id=34, process_id=65279, tree_id=1248644238, session_id=66137014, signature=\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00], [alloc_size=0, eof=0, times=[modified=0.0, modified_raw=116444736000000000, accessed=0.0, accessed_raw=116444736000000000, created=0.0, created_raw=116444736000000000, changed=0.0, changed_raw=116444736000000000], attrs=[read_only=F, hidden=F, system=F, directory=F, archive=F, normal=F, temporary=F, sparse_file=F, reparse_point=F, compressed=F, offline=F, not_content_indexed=F, encrypted=F, integrity_stream=F, no_scrub_data=F]]

BIN
testing/btest/Traces/smb/smb2-zero-byte-error-ioctl.pcap Normal file
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16
testing/btest/scripts/base/protocols/smb/smb2-zero-byte-error-ioctl.test Normal file
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@ -0,0 +1,16 @@
# @TEST-DOC: Tests handling of PDUs containing error ioctls with byte lengths of zero
# @TEST-EXEC: zeek -b -r $TRACES/smb/smb2-zero-byte-error-ioctl.pcap %INPUT 2>&1 >out
# @TEST-EXEC: ! test -f analyzer.log
# @TEST-EXEC: btest-diff out
@load base/protocols/smb
event smb2_close_request(c: connection, hdr: SMB2::Header, file_id: SMB2::GUID)
{
print "smb2_close_request", hdr;
}
event smb2_close_response(c: connection, hdr: SMB2::Header, response: SMB2::CloseResponse)
{
print "smb2_close_response", hdr, response;
}