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Fix segfault by OOB read on malformed packets

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This commit is contained in:
William Robinet 2020-09-03 19:06:50 +02:00
parent 4a0bbffc92
commit cebce341c5
1 changed files with 6 additions and 0 deletions
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6
base/network.c
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@ -134,6 +134,12 @@ int network_process_packet(handler,timestamp,data,length)
hlen=p.ip->ip_hl * 4;
p.data += hlen;
p.len = ntohs(p.ip->ip_len);
if(p.len > length) {
printf("Malformed packet, size from IP header is larger than size reported by libpcap, skipping ...\n");
return(0);
}
if (p.len == 0) {
DBG((0,"ip length reported as 0, presumed to be because of 'TCP segmentation offload' (TSO)\n"));
p.len = p._len;