From 49e2a26758f4e19da4a7bfccd792e0583fb6c1c1 Mon Sep 17 00:00:00 2001
From: Caolán McNamara <caolanm@redhat.com>
Date: Fri, 26 Jul 2019 13:25:31 +0100
Subject: decode url escape codes and check each path segment

Change-Id: Ie8f7cef912e8dacbc2a0bca73534a7a242a53ca1
Reviewed-on: https://gerrit.libreoffice.org/76378
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
Tested-by: Jenkins
(cherry picked from commit 7942929685fafb0f9c82feb8da7279e5103c87f0)
Reviewed-on: https://gerrit.libreoffice.org/76451
Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>
Tested-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>
(cherry picked from commit aab62f2b21c331ff8c31b7c856d5e59080b9d64a)
(cherry picked from commit 3098810911ccf76da1591d8f6cfceebfda13dcbd)
---
 sfx2/source/doc/objmisc.cxx | 29 ++++++++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/sfx2/source/doc/objmisc.cxx b/sfx2/source/doc/objmisc.cxx
index 657a7a80777e..2bb7b143a6bc 100644
--- a/sfx2/source/doc/objmisc.cxx
+++ b/sfx2/source/doc/objmisc.cxx
@@ -53,6 +53,8 @@
 #include <com/sun/star/script/provider/XScriptProvider.hpp>
 #include <com/sun/star/script/provider/XScriptProviderSupplier.hpp>
 #include <com/sun/star/ucb/SimpleFileAccess.hpp>
+#include <com/sun/star/uri/UriReferenceFactory.hpp>
+#include <com/sun/star/uri/XVndSunStarScriptUrlReference.hpp>
 #include <com/sun/star/util/XModifiable.hpp>
 
 #include <toolkit/helper/vclunohelper.hxx>
@@ -1360,7 +1362,32 @@ namespace
 // don't allow LibreLogo to be used with our mouseover/etc dom-alike events
 bool SfxObjectShell::UnTrustedScript(const OUString& rScriptURL)
 {
-    return rScriptURL.startsWithIgnoreAsciiCase("vnd.sun.star.script:LibreLogo");
+    if (!rScriptURL.startsWith("vnd.sun.star.script:"))
+        return false;
+
+    // ensure URL Escape Codes are decoded
+    css::uno::Reference<css::uri::XUriReference> uri(
+        css::uri::UriReferenceFactory::create(comphelper::getProcessComponentContext())->parse(rScriptURL));
+    css::uno::Reference<css::uri::XVndSunStarScriptUrl> sfUri(uri, css::uno::UNO_QUERY);
+
+    if (!sfUri.is())
+        return false;
+
+    OUString sScript = sfUri->getName();
+
+    // check if any path portion matches LibreLogo and ban it if it does
+    sal_Int32 nIndex = 0;
+    do
+    {
+        OUString aToken = sScript.getToken(0, '/', nIndex);
+        if (aToken.startsWithIgnoreAsciiCase("LibreLogo"))
+        {
+            return true;
+        }
+    }
+    while (nIndex >= 0);
+
+    return false;
 }
 
 ErrCode SfxObjectShell::CallXScript( const Reference< XInterface >& _rxScriptContext, const OUString& _rScriptURL,
-- 
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