From d3dcd4efe2ad1ad1865b2fe5c863c1ebd9482a84 Mon Sep 17 00:00:00 2001
From: Patrick McHardy <kaber@trash.net>
Date: Mon, 19 Jun 2006 23:39:45 -0700
Subject: [PATCH] [NETFILTER]: xt_sctp: fix endless loop caused by 0 chunk
length
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 | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/netfilter/xt_sctp.c b/net/netfilter/xt_sctp.c
index b5110e5b54b04..9316c753692fe 100644
--- 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;
--
2.30.2