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Add TCP options bad length check

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Fatema BW 2022-07-28 22:51:15 -07:00 • committed by GitHub
parent 28081d1efa
commit 622733c4ba
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1 changed files with 44 additions and 0 deletions
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44
src/packet_analysis/protocol/tcp/TCPSessionAdapter.cc
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@ -1803,6 +1803,50 @@ int TCPSessionAdapter::ParseTCPOptions(const struct tcphdr* tcp, bool is_orig)
}
break;
case 27:
// TCP Quick Start Response
if ( length == 8)
{
auto rate = o[2];
auto ttl_diff = o[3];
auto qs_nonce = ntohl(*reinterpret_cast<const uint32_t*>(o + 4));
option_record->Assign(8, rate);
option_record->Assign(9, ttl_diff);
option_record->Assign(10, qs_nonce);
}
else
{
add_option_data(option_record, o, length);
Weird("tcp_option_QSResponse_invalid_len", util::fmt("%d", length));
}
break;
case 28:
// TCP User Timeout option UTO
if ( length != 4 )
{
add_option_data(option_record, o, length);
Weird("tcp_option_UTO_invalid_len", util::fmt("%d", length));
}
break;
case 29:
// TCP Auth Option AO
if ( length < 4 )
{
add_option_data(option_record, o, length);
Weird("tcp_option_AO_invalid_len", util::fmt("%d", length));
}
break;
case 34:
// TCP Fast open TFO
if ( (length != 2) && (length < 6 || length > 18) )
{
add_option_data(option_record, o, length);
Weird("tcp_option_TFO_invalid_len", util::fmt("%d", length));
}
break;
default:
add_option_data(option_record, o, length);
break;