LSN-2014-0003: Don't expand entities when parsing XML

If the XML_PARSE_NOENT flag is passed to libxml2, then any
entities in the input document will be fully expanded. This
allows the user to read arbitrary files on the host machine
by creating an entity pointing to a local file. Removing
the XML_PARSE_NOENT flag means that any entities are left
unchanged by the parser, or expanded to "" by the XPath
APIs.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
(cherry picked from commit d6b27d3e4c40946efa79e91d134616b41b1666c4)

diff --git a/src/util/virxml.c b/src/util/virxml.c
index aa55a338748b1353457f0554d8a93d2a3641e5c7..613e8f0d73210abc9e68fe7809c492c39d2c8171 100644 (file)
--- a/src/util/virxml.c
+++ b/src/util/virxml.c
@@ -749,11 +749,11 @@ virXMLParseHelper(int domcode,
 
     if (filename) {
         xml = xmlCtxtReadFile(pctxt, filename, NULL,
-                              XML_PARSE_NOENT | XML_PARSE_NONET |
+                              XML_PARSE_NONET |
                               XML_PARSE_NOWARNING);
     } else {
         xml = xmlCtxtReadDoc(pctxt, BAD_CAST xmlStr, url, NULL,
-                             XML_PARSE_NOENT | XML_PARSE_NONET |
+                             XML_PARSE_NONET |
                              XML_PARSE_NOWARNING);
     }
     if (!xml)