From 9b54895fad37c0a57b77bb3f0cde4ab6806b45f9 Mon Sep 17 00:00:00 2001
From: dmiller <dmiller@e0a8ed71-7df4-0310-8962-fdc924857419>
Date: Sat, 8 Sep 2018 17:06:58 +0000
Subject: [PATCH] Avoid repeatedly checking the same EXIF tag; pos should not
 be shadowed

---
 scripts/http-exif-spider.nse | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/scripts/http-exif-spider.nse b/scripts/http-exif-spider.nse
index e19c5b4e4..dc8465527 100644
--- a/scripts/http-exif-spider.nse
+++ b/scripts/http-exif-spider.nse
@@ -351,7 +351,8 @@ local function process_gps(data, pos, endian, result)
 
   -- Loop through the entries to find the fun stuff
   for i=1, num_entries do
-    local pos, tag, format, components, value = bin.unpack(endian .. "SSII", data, pos)
+    local tag, format, components, value
+    tag, format, components, value, pos = string.unpack(endian .. "I2 I2 I4 I4", data, pos)
 
     if(tag == GPS_TAG_LATITUDE or tag == GPS_TAG_LONGITUDE) then
       local dummy, gps, h, m, s