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2002 Feb 27
0
[ANNOUNCE] Security Advisory about IRC DCC connection tracking
...allation seem to have a very
permissive "-m state --state RELATED -j ACCEPT" rule. In this case,
as soon as somebody from inside the private network issues a IRC DCC=20
request, a single connection from the outside network to the port number
stated in the DCC request on any (internal) IP adddres will get accepted.
SOLUTION
- --------
Update to a >=3D 2.4.18-pre9 kernel OR apply the following patch:
- --- linux-2.4.18-pre8-plain/net/ipv4/netfilter/ip_conntrack_irc.c Sat Dec=
22 18:52:16 2001
+++ linux-2.4.18-pre8-nfpom/net/ipv4/netfilter/ip_conntrack_irc.c Tue Feb =
5 15:55:29 2002...