Commit fe728806 authored by liucheng (G)'s avatar liucheng (G) Committed by Joe Hershberger

CVE: net: fix unbounded memcpy of UDP packet

This patch adds a check to udp_len to fix unbounded memcpy for
CVE-2019-14192, CVE-2019-14193 and CVE-2019-14199.
Signed-off-by: default avatarCheng Liu <liucheng32@huawei.com>
Reviewed-by: default avatarSimon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Reported-by: default avatarFermín Serna <fermin@semmle.com>
Acked-by: Joe Hershberger's avatarJoe Hershberger <joe.hershberger@ni.com>
parent 12c2a310
......@@ -1264,6 +1264,9 @@ void net_process_received_packet(uchar *in_packet, int len)
return;
}
if (ntohs(ip->udp_len) < UDP_HDR_SIZE || ntohs(ip->udp_len) > ntohs(ip->ip_len))
return;
debug_cond(DEBUG_DEV_PKT,
"received UDP (to=%pI4, from=%pI4, len=%d)\n",
&dst_ip, &src_ip, len);
......
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