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authorPatrick McHardy <kaber@trash.net>2006-01-09 16:43:43 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2006-01-10 12:54:30 -0800
commit15db34702cfafd24acc60295cf14861e497502ab (patch)
tree541d18bb0b8e1d915ca258d16ea79df730b8f0b7
parentbb94aa169eaa6e713a429370d37388722f08666f (diff)
[NETFILTER]: Fix crash in ip_nat_pptp
When an inbound PPTP_IN_CALL_REQUEST packet is received the PPTP NAT helper uses a NULL pointer in pointer arithmentic to calculate the offset in the packet which needs to be mangled and corrupts random memory or crashes. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ipv4/netfilter/ip_nat_helper_pptp.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/netfilter/ip_nat_helper_pptp.c b/net/ipv4/netfilter/ip_nat_helper_pptp.c
index e546203f566..8ad7b36e242 100644
--- a/net/ipv4/netfilter/ip_nat_helper_pptp.c
+++ b/net/ipv4/netfilter/ip_nat_helper_pptp.c
@@ -315,7 +315,7 @@ pptp_inbound_pkt(struct sk_buff **pskb,
break;
case PPTP_IN_CALL_REQUEST:
/* only need to nat in case PAC is behind NAT box */
- break;
+ return NF_ACCEPT;
case PPTP_WAN_ERROR_NOTIFY:
pcid = &pptpReq->wanerr.peersCallID;
break;