Patch origin: upstream

Patch status: will be part of next version

https://git.gnome.org/browse/libxslt/commit/?id=7ca19df892ca22d9314e95d59ce2abdeff46b617

From 7ca19df892ca22d9314e95d59ce2abdeff46b617 Mon Sep 17 00:00:00 2001

From: Daniel Veillard <[email protected]>

Date: Thu, 29 Oct 2015 19:33:23 +0800

Subject: Fix for type confusion in preprocessing attributes

CVE-2015-7995 http://www.openwall.com/lists/oss-security/2015/10/27/10

We need to check that the parent node is an element before dereferencing

its namespace

---

 libxslt/preproc.c | 3 ++-

 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libxslt/preproc.c b/libxslt/preproc.c

index 0eb80a0..7f69325 100644

--- a/libxslt/preproc.c

+++ b/libxslt/preproc.c

@@ -2249,7 +2249,8 @@ xsltStylePreCompute(xsltStylesheetPtr style, xmlNodePtr inst) {

 	} else if (IS_XSLT_NAME(inst, "attribute")) {

 	    xmlNodePtr parent = inst->parent;

-	    if ((parent == NULL) || (parent->ns == NULL) ||

+	    if ((parent == NULL) ||

+	        (parent->type != XML_ELEMENT_NODE) || (parent->ns == NULL) ||

 		((parent->ns != inst->ns) &&

 		 (!xmlStrEqual(parent->ns->href, inst->ns->href))) ||

 		(!xmlStrEqual(parent->name, BAD_CAST "attribute-set"))) {

-- 

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