This patch addresses two heap overflow bugs in raptor2: http://seclists.org/oss-sec/2017/q2/424 Patch copied from libreoffice: https://github.com/LibreOffice/core/blob/master/external/redland/raptor/0001-Calcualte-max-nspace-declarations-correctly-for-XML-.patch.1 From 590681e546cd9aa18d57dc2ea1858cb734a3863f Mon Sep 17 00:00:00 2001 From: Dave Beckett Date: Sun, 16 Apr 2017 23:15:12 +0100 Subject: [PATCH] Calcualte max nspace declarations correctly for XML writer (raptor_xml_writer_start_element_common): Calculate max including for each attribute a potential name and value. Fixes Issues #0000617 http://bugs.librdf.org/mantis/view.php?id=617 and #0000618 http://bugs.librdf.org/mantis/view.php?id=618 --- src/raptor_xml_writer.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/src/raptor_xml_writer.c b/src/raptor_xml_writer.c index 693b946..0d3a36a 100644 --- a/src/raptor_xml_writer.c +++ b/src/raptor_xml_writer.c @@ -181,9 +181,10 @@ raptor_xml_writer_start_element_common(raptor_xml_writer* xml_writer, size_t nspace_declarations_count = 0; unsigned int i; - /* max is 1 per element and 1 for each attribute + size of declared */ if(nstack) { - int nspace_max_count = element->attribute_count+1; + int nspace_max_count = element->attribute_count * 2; /* attr and value */ + if(element->name->nspace) + nspace_max_count++; if(element->declared_nspaces) nspace_max_count += raptor_sequence_size(element->declared_nspaces); if(element->xml_language) @@ -237,7 +238,7 @@ raptor_xml_writer_start_element_common(raptor_xml_writer* xml_writer, } } - /* Add the attribute + value */ + /* Add the attribute's value */ nspace_declarations[nspace_declarations_count].declaration= raptor_qname_format_as_xml(element->attributes[i], &nspace_declarations[nspace_declarations_count].length); -- 2.9.3
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