[testsuite] Add reproducer for #378/CVE-2018-14046 to the testsuite

tests/bugfixes/github/test_CVE_2018_2018_14046.py

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+
+import system_tests
+
+
+class WebpDecodeChunksOutOfBoundsRead(metaclass=system_tests.CaseMeta):
+
+    url = "https://github.com/Exiv2/exiv2/issues/378"
+
+    filename = "$data_path/issue_378_1-poc-heapoverflow"
+
+    commands = ["$exiv2 -pp $filename"]
+    stdout = [""]
+    stderr = [
+        """$exiv2_exception_message $filename:
+$kerCorruptedMetadata
+"""
+    ]
+    retval = [1]