From 3d8731c8f52cf1ed40bbabd319a3b732cdbcd3d2 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Thu, 17 Sep 2020 16:16:38 +0200
Subject: ftp: avoid risk of reading uninitialized integers

If the received PASV response doesn't match the expected pattern, we
could end up reading uninitialized integers for IP address and port
number.

Issue pointed out by muse.dev
Closes #5972
---
 lib/ftp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/ftp.c b/lib/ftp.c
index 868a97a53..434401390 100644
--- a/lib/ftp.c
+++ b/lib/ftp.c
@@ -1860,8 +1860,8 @@ static CURLcode ftp_state_pasv_resp(struct connectdata *conn,
   else if((ftpc->count1 == 1) &&
           (ftpcode == 227)) {
     /* positive PASV response */
-    unsigned int ip[4];
-    unsigned int port[2];
+    unsigned int ip[4] = {0, 0, 0, 0};
+    unsigned int port[2] = {0, 0};
 
     /*
      * Scan for a sequence of six comma-separated numbers and use them as
-- 
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