Fix unsigned underflow for short public key packets in legacy code.

das-labor · Mar 23, 2018 · 5384abf · 5384abf
1 parent cfca3c0
commit 5384abf
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/legacy/gnupg/g10/parse-packet.cpp b/legacy/gnupg/g10/parse-packet.cpp
@@ -1864,6 +1864,7 @@ static int parse_key(IOBUF inp, int pkttype, unsigned long pktlen, byte *hdr,
 
   pk = pkt->pkt.public_key; /* PK has been cleared. */
 
+  if (!pktlen) return GPG_ERR_INV_PACKET;
   version = iobuf_get_noeof(inp);
   pktlen--;
   if (version == 4) {