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[NETFILTER]: xt_sctp: fix endless loop caused by 0 chunk length
author
Patrick McHardy
<kaber@trash.net>
Tue, 20 Jun 2006 06:39:45 +0000
(23:39 -0700)
committer
David S. Miller
<davem@davemloft.net>
Tue, 20 Jun 2006 06:39:45 +0000
(23:39 -0700)
Fix endless loop in the SCTP match similar to those already fixed in
the SCTP conntrack helper (was CVE-2006-1527).
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/netfilter/xt_sctp.c
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diff --git
a/net/netfilter/xt_sctp.c
b/net/netfilter/xt_sctp.c
index b5110e5b54b046989fb3d7fa1abb3b5d437419b9..9316c753692fef1bbbd81f71a381000d6edbb024 100644
(file)
--- a/
net/netfilter/xt_sctp.c
+++ b/
net/netfilter/xt_sctp.c
@@
-62,7
+62,7
@@
match_packet(const struct sk_buff *skb,
do {
sch = skb_header_pointer(skb, offset, sizeof(_sch), &_sch);
- if (sch == NULL) {
+ if (sch == NULL
|| sch->length == 0
) {
duprintf("Dropping invalid SCTP packet.\n");
*hotdrop = 1;
return 0;