Project

General

Profile

Download (1.78 KB)

Security #4504 » 0001-stream-tcp-avoid-evasion-by-sending-crafted-SYN-pack.patch

Peter Manev, 05/28/2021 10:02 AM

View differences:

src/stream-tcp.c
/* broken TCP http://ask.wireshark.org/questions/3183/acknowledgment-number-broken-tcp-the-acknowledge-field-is-nonzero-while-the-ack-flag-is-not-set */
if (!(p->tcph->th_flags & TH_ACK) && TCP_GET_ACK(p) != 0) {
StreamTcpSetEvent(p, STREAM_PKT_BROKEN_ACK);
goto error;
StreamTcpSetEvent(p, STREAM_PKT_BROKEN_ACK);
if (!(p->tcph->th_flags & TH_SYN))
goto error;
}
/* If we are on IPS mode, and got a drop action triggered from
(2-2/2)