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I can find no reason to allow packets with both SYN and FIN bits

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set past this point in the code. The packet should be dropped and
not massaged as it is here.

Differential Revision:  https://reviews.freebsd.org/D2266
Submitted by: eri
Sponsored by: Rubicon Communications (Netgate)
This commit is contained in:
gnn 2015-04-14 14:43:42 +00:00
parent de9078cbfa
commit be303b042b
1 changed files with 1 additions and 1 deletions
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2
sys/netpfil/pf/pf_norm.c
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@ -1643,7 +1643,7 @@ pf_normalize_tcp(int dir, struct pfi_kif *kif, struct mbuf *m, int ipoff,
goto tcp_drop;
if (flags & TH_FIN)
flags &= ~TH_FIN;
goto tcp_drop;
} else {
/* Illegal packet */
if (!(flags & (TH_ACK|TH_RST)))