Merge branch 'stable-4.2' into 'stable-4.2'stable-4.2

stable-4.2: Fix CVE-2020-29129, CVE-2020-29130

See merge request slirp/libslirp!58

2 files changed, 8 insertions, 0 deletions

diff --git a/src/ncsi.c b/src/ncsi.c
index 3c1dfef..75dcc08 100644
--- a/src/ncsi.c
+++ b/src/ncsi.c
@@ -148,6 +148,10 @@ void ncsi_input(Slirp *slirp, const uint8_t *pkt, int pkt_len)
     uint32_t checksum;
     uint32_t *pchecksum;
 
+    if (pkt_len < ETH_HLEN + sizeof(struct ncsi_pkt_hdr)) {
+        return; /* packet too short */
+    }
+
     memset(ncsi_reply, 0, sizeof(ncsi_reply));
 
     memset(reh->h_dest, 0xff, ETH_ALEN);
diff --git a/src/slirp.c b/src/slirp.c
index dba7c98..9be58e2 100644
--- a/src/slirp.c
+++ b/src/slirp.c
@@ -756,6 +756,10 @@ static void arp_input(Slirp *slirp, const uint8_t *pkt, int pkt_len)
         return;
     }
 
+    if (pkt_len < ETH_HLEN + sizeof(struct slirp_arphdr)) {
+        return; /* packet too short */
+    }
+
     ar_op = ntohs(ah->ar_op);
     switch (ar_op) {
     case ARPOP_REQUEST: