mirror of
https://git.in.rschanz.org/ryan77627/guix.git
synced 2024-11-07 23:46:13 -05:00
3a2bcac6bd
* gnu/packages/patches/libxml2-CVE-2016-5131.patch: New file. * gnu/local.mk (dist_patch_DATA): Add it. * gnu/packages/xml.scm (libxml2/fixed)[source]: Add it.
218 lines
6.2 KiB
Diff
218 lines
6.2 KiB
Diff
Fix CVE-2016-5131:
|
|
|
|
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5131
|
|
|
|
Patches copied from upstream source repository (the test suite fails
|
|
without the 2nd patch):
|
|
|
|
https://git.gnome.org/browse/libxml2/commit/?id=9ab01a277d71f54d3143c2cf333c5c2e9aaedd9e
|
|
https://git.gnome.org/browse/libxml2/commit/?id=a005199330b86dada19d162cae15ef9bdcb6baa8
|
|
|
|
From 9ab01a277d71f54d3143c2cf333c5c2e9aaedd9e Mon Sep 17 00:00:00 2001
|
|
From: Nick Wellnhofer <wellnhofer@aevum.de>
|
|
Date: Tue, 28 Jun 2016 14:22:23 +0200
|
|
Subject: [PATCH] Fix XPointer paths beginning with range-to
|
|
|
|
The old code would invoke the broken xmlXPtrRangeToFunction. range-to
|
|
isn't really a function but a special kind of location step. Remove
|
|
this function and always handle range-to in the XPath code.
|
|
|
|
The old xmlXPtrRangeToFunction could also be abused to trigger a
|
|
use-after-free error with the potential for remote code execution.
|
|
|
|
Found with afl-fuzz.
|
|
|
|
Fixes CVE-2016-5131.
|
|
---
|
|
result/XPath/xptr/vidbase | 13 ++++++++
|
|
test/XPath/xptr/vidbase | 1 +
|
|
xpath.c | 7 ++++-
|
|
xpointer.c | 76 ++++-------------------------------------------
|
|
4 files changed, 26 insertions(+), 71 deletions(-)
|
|
|
|
diff --git a/result/XPath/xptr/vidbase b/result/XPath/xptr/vidbase
|
|
index 8b9e92d6..f19193e7 100644
|
|
--- a/result/XPath/xptr/vidbase
|
|
+++ b/result/XPath/xptr/vidbase
|
|
@@ -17,3 +17,16 @@ Object is a Location Set:
|
|
To node
|
|
ELEMENT p
|
|
|
|
+
|
|
+========================
|
|
+Expression: xpointer(range-to(id('chapter2')))
|
|
+Object is a Location Set:
|
|
+1 : Object is a range :
|
|
+ From node
|
|
+ /
|
|
+ To node
|
|
+ ELEMENT chapter
|
|
+ ATTRIBUTE id
|
|
+ TEXT
|
|
+ content=chapter2
|
|
+
|
|
diff --git a/test/XPath/xptr/vidbase b/test/XPath/xptr/vidbase
|
|
index b1463830..884b1065 100644
|
|
--- a/test/XPath/xptr/vidbase
|
|
+++ b/test/XPath/xptr/vidbase
|
|
@@ -1,2 +1,3 @@
|
|
xpointer(id('chapter1')/p)
|
|
xpointer(id('chapter1')/p[1]/range-to(following-sibling::p[2]))
|
|
+xpointer(range-to(id('chapter2')))
|
|
diff --git a/xpath.c b/xpath.c
|
|
index d992841e..5a01b1b3 100644
|
|
--- a/xpath.c
|
|
+++ b/xpath.c
|
|
@@ -10691,13 +10691,18 @@ xmlXPathCompPathExpr(xmlXPathParserContextPtr ctxt) {
|
|
lc = 1;
|
|
break;
|
|
} else if ((NXT(len) == '(')) {
|
|
- /* Note Type or Function */
|
|
+ /* Node Type or Function */
|
|
if (xmlXPathIsNodeType(name)) {
|
|
#ifdef DEBUG_STEP
|
|
xmlGenericError(xmlGenericErrorContext,
|
|
"PathExpr: Type search\n");
|
|
#endif
|
|
lc = 1;
|
|
+#ifdef LIBXML_XPTR_ENABLED
|
|
+ } else if (ctxt->xptr &&
|
|
+ xmlStrEqual(name, BAD_CAST "range-to")) {
|
|
+ lc = 1;
|
|
+#endif
|
|
} else {
|
|
#ifdef DEBUG_STEP
|
|
xmlGenericError(xmlGenericErrorContext,
|
|
diff --git a/xpointer.c b/xpointer.c
|
|
index 676c5105..d74174a3 100644
|
|
--- a/xpointer.c
|
|
+++ b/xpointer.c
|
|
@@ -1332,8 +1332,6 @@ xmlXPtrNewContext(xmlDocPtr doc, xmlNodePtr here, xmlNodePtr origin) {
|
|
ret->here = here;
|
|
ret->origin = origin;
|
|
|
|
- xmlXPathRegisterFunc(ret, (xmlChar *)"range-to",
|
|
- xmlXPtrRangeToFunction);
|
|
xmlXPathRegisterFunc(ret, (xmlChar *)"range",
|
|
xmlXPtrRangeFunction);
|
|
xmlXPathRegisterFunc(ret, (xmlChar *)"range-inside",
|
|
@@ -2243,76 +2241,14 @@ xmlXPtrRangeInsideFunction(xmlXPathParserContextPtr ctxt, int nargs) {
|
|
* @nargs: the number of args
|
|
*
|
|
* Implement the range-to() XPointer function
|
|
+ *
|
|
+ * Obsolete. range-to is not a real function but a special type of location
|
|
+ * step which is handled in xpath.c.
|
|
*/
|
|
void
|
|
-xmlXPtrRangeToFunction(xmlXPathParserContextPtr ctxt, int nargs) {
|
|
- xmlXPathObjectPtr range;
|
|
- const xmlChar *cur;
|
|
- xmlXPathObjectPtr res, obj;
|
|
- xmlXPathObjectPtr tmp;
|
|
- xmlLocationSetPtr newset = NULL;
|
|
- xmlNodeSetPtr oldset;
|
|
- int i;
|
|
-
|
|
- if (ctxt == NULL) return;
|
|
- CHECK_ARITY(1);
|
|
- /*
|
|
- * Save the expression pointer since we will have to evaluate
|
|
- * it multiple times. Initialize the new set.
|
|
- */
|
|
- CHECK_TYPE(XPATH_NODESET);
|
|
- obj = valuePop(ctxt);
|
|
- oldset = obj->nodesetval;
|
|
- ctxt->context->node = NULL;
|
|
-
|
|
- cur = ctxt->cur;
|
|
- newset = xmlXPtrLocationSetCreate(NULL);
|
|
-
|
|
- for (i = 0; i < oldset->nodeNr; i++) {
|
|
- ctxt->cur = cur;
|
|
-
|
|
- /*
|
|
- * Run the evaluation with a node list made of a single item
|
|
- * in the nodeset.
|
|
- */
|
|
- ctxt->context->node = oldset->nodeTab[i];
|
|
- tmp = xmlXPathNewNodeSet(ctxt->context->node);
|
|
- valuePush(ctxt, tmp);
|
|
-
|
|
- xmlXPathEvalExpr(ctxt);
|
|
- CHECK_ERROR;
|
|
-
|
|
- /*
|
|
- * The result of the evaluation need to be tested to
|
|
- * decided whether the filter succeeded or not
|
|
- */
|
|
- res = valuePop(ctxt);
|
|
- range = xmlXPtrNewRangeNodeObject(oldset->nodeTab[i], res);
|
|
- if (range != NULL) {
|
|
- xmlXPtrLocationSetAdd(newset, range);
|
|
- }
|
|
-
|
|
- /*
|
|
- * Cleanup
|
|
- */
|
|
- if (res != NULL)
|
|
- xmlXPathFreeObject(res);
|
|
- if (ctxt->value == tmp) {
|
|
- res = valuePop(ctxt);
|
|
- xmlXPathFreeObject(res);
|
|
- }
|
|
-
|
|
- ctxt->context->node = NULL;
|
|
- }
|
|
-
|
|
- /*
|
|
- * The result is used as the new evaluation set.
|
|
- */
|
|
- xmlXPathFreeObject(obj);
|
|
- ctxt->context->node = NULL;
|
|
- ctxt->context->contextSize = -1;
|
|
- ctxt->context->proximityPosition = -1;
|
|
- valuePush(ctxt, xmlXPtrWrapLocationSet(newset));
|
|
+xmlXPtrRangeToFunction(xmlXPathParserContextPtr ctxt,
|
|
+ int nargs ATTRIBUTE_UNUSED) {
|
|
+ XP_ERROR(XPATH_EXPR_ERROR);
|
|
}
|
|
|
|
/**
|
|
--
|
|
2.11.0
|
|
|
|
From a005199330b86dada19d162cae15ef9bdcb6baa8 Mon Sep 17 00:00:00 2001
|
|
From: Nick Wellnhofer <wellnhofer@aevum.de>
|
|
Date: Tue, 28 Jun 2016 14:19:58 +0200
|
|
Subject: [PATCH] Fix comparison with root node in xmlXPathCmpNodes
|
|
|
|
This change has already been made in xmlXPathCmpNodesExt but not in
|
|
xmlXPathCmpNodes.
|
|
---
|
|
xpath.c | 4 ++--
|
|
1 file changed, 2 insertions(+), 2 deletions(-)
|
|
|
|
diff --git a/xpath.c b/xpath.c
|
|
index 751665b8..d992841e 100644
|
|
--- a/xpath.c
|
|
+++ b/xpath.c
|
|
@@ -3342,13 +3342,13 @@ xmlXPathCmpNodes(xmlNodePtr node1, xmlNodePtr node2) {
|
|
* compute depth to root
|
|
*/
|
|
for (depth2 = 0, cur = node2;cur->parent != NULL;cur = cur->parent) {
|
|
- if (cur == node1)
|
|
+ if (cur->parent == node1)
|
|
return(1);
|
|
depth2++;
|
|
}
|
|
root = cur;
|
|
for (depth1 = 0, cur = node1;cur->parent != NULL;cur = cur->parent) {
|
|
- if (cur == node2)
|
|
+ if (cur->parent == node2)
|
|
return(-1);
|
|
depth1++;
|
|
}
|
|
--
|
|
2.11.0
|
|
|