From 4feb9e66ff9636ad44bc23a91b7ebd37d83ddf1d Mon Sep 17 00:00:00 2001
From: Stanislav Malyshev <stas@php.net>
Date: Tue, 1 Jan 2019 17:15:20 -0800
Subject: [PATCH] Fix bug #77380  (Global out of bounds read in xmlrpc base64
 code)

---
 ext/xmlrpc/libxmlrpc/base64.c  |  4 ++--
 ext/xmlrpc/tests/bug77380.phpt | 17 +++++++++++++++++
 2 files changed, 19 insertions(+), 2 deletions(-)
 create mode 100644 ext/xmlrpc/tests/bug77380.phpt

diff --git a/ext/xmlrpc/libxmlrpc/base64.c b/ext/xmlrpc/libxmlrpc/base64.c
index 5ebdf31..a4fa193 100644
--- a/ext/xmlrpc/libxmlrpc/base64.c
+++ b/ext/xmlrpc/libxmlrpc/base64.c
@@ -165,7 +165,7 @@ void base64_decode_xmlrpc(struct buffer_st *bfr, const char *source, int length)
 		return;
 	    }
 
-	    if (dtable[c] & 0x80) {
+	    if (dtable[(unsigned char)c] & 0x80) {
 	      /*
 	      fprintf(stderr, "Offset %i length %i\n", offset, length);
 	      fprintf(stderr, "character '%c:%x:%c' in input file.\n", c, c, dtable[c]);
diff --git a/ext/xmlrpc/tests/bug77380.phpt b/ext/xmlrpc/tests/bug77380.phpt
new file mode 100644
index 0000000..8559c07
--- /dev/null
+++ b/ext/xmlrpc/tests/bug77380.phpt
@@ -0,0 +1,17 @@
+--TEST--
+Bug #77380 (Global out of bounds read in xmlrpc base64 code)
+--SKIPIF--
+<?php
+if (!extension_loaded("xmlrpc")) print "skip";
+?>
+--FILE--
+<?php
+var_dump(xmlrpc_decode(base64_decode("PGJhc2U2ND7CkzwvYmFzZTY0Pgo=")));
+?>
+--EXPECT--
+object(stdClass)#1 (2) {
+  ["scalar"]=>
+  string(0) ""
+  ["xmlrpc_type"]=>
+  string(6) "base64"
+}
-- 
2.1.4