gnu: libxml2: Fix CVE-2016-4658.
* gnu/packages/xml.scm (libxml2)[replacement]: New field. (libxml2/fixed): New variable. * gnu/packages/patches/libxml2-CVE-2016-4658.patch: New file. * gnu/local.mk (dist_patch_DATA): Add it.
This commit is contained in:
Leo Famulari
parent
daa481f59a
commit
0c83c6bf26
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@ -696,6 +696,7 @@ dist_patch_DATA = \
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%D%/packages/patches/libwmf-CVE-2015-0848+CVE-2015-4588.patch \
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%D%/packages/patches/libwmf-CVE-2015-0848+CVE-2015-4588.patch \
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%D%/packages/patches/libwmf-CVE-2015-4695.patch \
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%D%/packages/patches/libwmf-CVE-2015-4695.patch \
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%D%/packages/patches/libwmf-CVE-2015-4696.patch \
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%D%/packages/patches/libwmf-CVE-2015-4696.patch \
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%D%/packages/patches/libxml2-CVE-2016-4658.patch \
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%D%/packages/patches/libxslt-generated-ids.patch \
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%D%/packages/patches/libxslt-generated-ids.patch \
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%D%/packages/patches/libxslt-CVE-2016-4738.patch \
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%D%/packages/patches/libxslt-CVE-2016-4738.patch \
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%D%/packages/patches/linux-pam-no-setfsuid.patch \
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%D%/packages/patches/linux-pam-no-setfsuid.patch \
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@ -0,0 +1,257 @@
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Fix CVE-2016-4658:
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https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4658
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Patch copied from upstream source repository:
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https://git.gnome.org/browse/libxml2/commit/?id=c1d1f7121194036608bf555f08d3062a36fd344b
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From c1d1f7121194036608bf555f08d3062a36fd344b Mon Sep 17 00:00:00 2001
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From: Nick Wellnhofer <wellnhofer@aevum.de>
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Date: Tue, 28 Jun 2016 18:34:52 +0200
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Subject: [PATCH] Disallow namespace nodes in XPointer ranges
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Namespace nodes must be copied to avoid use-after-free errors.
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But they don't necessarily have a physical representation in a
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document, so simply disallow them in XPointer ranges.
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Found with afl-fuzz.
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Fixes CVE-2016-4658.
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---
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xpointer.c | 149 +++++++++++++++++++++++--------------------------------------
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1 file changed, 56 insertions(+), 93 deletions(-)
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diff --git a/xpointer.c b/xpointer.c
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index a7b03fbd..694d120e 100644
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--- a/xpointer.c
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+++ b/xpointer.c
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@@ -320,6 +320,45 @@ xmlXPtrRangesEqual(xmlXPathObjectPtr range1, xmlXPathObjectPtr range2) {
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}
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/**
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+ * xmlXPtrNewRangeInternal:
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+ * @start: the starting node
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+ * @startindex: the start index
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+ * @end: the ending point
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+ * @endindex: the ending index
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+ *
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+ * Internal function to create a new xmlXPathObjectPtr of type range
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+ *
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+ * Returns the newly created object.
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+ */
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+static xmlXPathObjectPtr
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+xmlXPtrNewRangeInternal(xmlNodePtr start, int startindex,
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+ xmlNodePtr end, int endindex) {
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+ xmlXPathObjectPtr ret;
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+
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+ /*
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+ * Namespace nodes must be copied (see xmlXPathNodeSetDupNs).
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+ * Disallow them for now.
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+ */
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+ if ((start != NULL) && (start->type == XML_NAMESPACE_DECL))
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+ return(NULL);
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+ if ((end != NULL) && (end->type == XML_NAMESPACE_DECL))
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+ return(NULL);
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+
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+ ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject));
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+ if (ret == NULL) {
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+ xmlXPtrErrMemory("allocating range");
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+ return(NULL);
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+ }
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+ memset(ret, 0, sizeof(xmlXPathObject));
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+ ret->type = XPATH_RANGE;
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+ ret->user = start;
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+ ret->index = startindex;
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+ ret->user2 = end;
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+ ret->index2 = endindex;
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+ return(ret);
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+}
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+
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+/**
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* xmlXPtrNewRange:
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* @start: the starting node
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* @startindex: the start index
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@@ -344,17 +383,7 @@ xmlXPtrNewRange(xmlNodePtr start, int startindex,
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if (endindex < 0)
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return(NULL);
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- ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject));
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- if (ret == NULL) {
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- xmlXPtrErrMemory("allocating range");
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- return(NULL);
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- }
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- memset(ret, 0 , (size_t) sizeof(xmlXPathObject));
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- ret->type = XPATH_RANGE;
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- ret->user = start;
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- ret->index = startindex;
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- ret->user2 = end;
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- ret->index2 = endindex;
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+ ret = xmlXPtrNewRangeInternal(start, startindex, end, endindex);
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xmlXPtrRangeCheckOrder(ret);
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return(ret);
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}
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@@ -381,17 +410,8 @@ xmlXPtrNewRangePoints(xmlXPathObjectPtr start, xmlXPathObjectPtr end) {
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if (end->type != XPATH_POINT)
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return(NULL);
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- ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject));
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- if (ret == NULL) {
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- xmlXPtrErrMemory("allocating range");
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- return(NULL);
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- }
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- memset(ret, 0 , (size_t) sizeof(xmlXPathObject));
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- ret->type = XPATH_RANGE;
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- ret->user = start->user;
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- ret->index = start->index;
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- ret->user2 = end->user;
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- ret->index2 = end->index;
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+ ret = xmlXPtrNewRangeInternal(start->user, start->index, end->user,
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+ end->index);
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xmlXPtrRangeCheckOrder(ret);
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return(ret);
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}
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@@ -416,17 +436,7 @@ xmlXPtrNewRangePointNode(xmlXPathObjectPtr start, xmlNodePtr end) {
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if (start->type != XPATH_POINT)
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return(NULL);
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- ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject));
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- if (ret == NULL) {
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- xmlXPtrErrMemory("allocating range");
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- return(NULL);
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- }
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- memset(ret, 0 , (size_t) sizeof(xmlXPathObject));
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- ret->type = XPATH_RANGE;
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- ret->user = start->user;
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- ret->index = start->index;
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- ret->user2 = end;
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- ret->index2 = -1;
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+ ret = xmlXPtrNewRangeInternal(start->user, start->index, end, -1);
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xmlXPtrRangeCheckOrder(ret);
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return(ret);
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}
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@@ -453,17 +463,7 @@ xmlXPtrNewRangeNodePoint(xmlNodePtr start, xmlXPathObjectPtr end) {
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if (end->type != XPATH_POINT)
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return(NULL);
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- ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject));
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- if (ret == NULL) {
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- xmlXPtrErrMemory("allocating range");
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- return(NULL);
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- }
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- memset(ret, 0 , (size_t) sizeof(xmlXPathObject));
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- ret->type = XPATH_RANGE;
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- ret->user = start;
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- ret->index = -1;
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- ret->user2 = end->user;
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- ret->index2 = end->index;
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+ ret = xmlXPtrNewRangeInternal(start, -1, end->user, end->index);
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xmlXPtrRangeCheckOrder(ret);
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return(ret);
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}
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@@ -486,17 +486,7 @@ xmlXPtrNewRangeNodes(xmlNodePtr start, xmlNodePtr end) {
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if (end == NULL)
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return(NULL);
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- ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject));
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- if (ret == NULL) {
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- xmlXPtrErrMemory("allocating range");
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- return(NULL);
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- }
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- memset(ret, 0 , (size_t) sizeof(xmlXPathObject));
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- ret->type = XPATH_RANGE;
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- ret->user = start;
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- ret->index = -1;
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- ret->user2 = end;
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- ret->index2 = -1;
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+ ret = xmlXPtrNewRangeInternal(start, -1, end, -1);
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xmlXPtrRangeCheckOrder(ret);
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return(ret);
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}
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@@ -516,17 +506,7 @@ xmlXPtrNewCollapsedRange(xmlNodePtr start) {
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if (start == NULL)
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return(NULL);
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- ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject));
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- if (ret == NULL) {
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- xmlXPtrErrMemory("allocating range");
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- return(NULL);
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- }
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- memset(ret, 0 , (size_t) sizeof(xmlXPathObject));
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- ret->type = XPATH_RANGE;
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- ret->user = start;
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- ret->index = -1;
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- ret->user2 = NULL;
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- ret->index2 = -1;
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+ ret = xmlXPtrNewRangeInternal(start, -1, NULL, -1);
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return(ret);
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}
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@@ -541,6 +521,8 @@ xmlXPtrNewCollapsedRange(xmlNodePtr start) {
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*/
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xmlXPathObjectPtr
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xmlXPtrNewRangeNodeObject(xmlNodePtr start, xmlXPathObjectPtr end) {
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+ xmlNodePtr endNode;
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+ int endIndex;
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xmlXPathObjectPtr ret;
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if (start == NULL)
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@@ -549,7 +531,12 @@ xmlXPtrNewRangeNodeObject(xmlNodePtr start, xmlXPathObjectPtr end) {
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return(NULL);
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switch (end->type) {
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case XPATH_POINT:
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+ endNode = end->user;
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+ endIndex = end->index;
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+ break;
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case XPATH_RANGE:
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+ endNode = end->user2;
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+ endIndex = end->index2;
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break;
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case XPATH_NODESET:
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/*
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@@ -557,39 +544,15 @@ xmlXPtrNewRangeNodeObject(xmlNodePtr start, xmlXPathObjectPtr end) {
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*/
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if (end->nodesetval->nodeNr <= 0)
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return(NULL);
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+ endNode = end->nodesetval->nodeTab[end->nodesetval->nodeNr - 1];
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+ endIndex = -1;
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break;
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default:
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/* TODO */
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return(NULL);
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}
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- ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject));
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- if (ret == NULL) {
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- xmlXPtrErrMemory("allocating range");
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- return(NULL);
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- }
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- memset(ret, 0 , (size_t) sizeof(xmlXPathObject));
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- ret->type = XPATH_RANGE;
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- ret->user = start;
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- ret->index = -1;
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- switch (end->type) {
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- case XPATH_POINT:
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- ret->user2 = end->user;
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- ret->index2 = end->index;
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- break;
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- case XPATH_RANGE:
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- ret->user2 = end->user2;
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- ret->index2 = end->index2;
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- break;
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- case XPATH_NODESET: {
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- ret->user2 = end->nodesetval->nodeTab[end->nodesetval->nodeNr - 1];
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- ret->index2 = -1;
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- break;
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- }
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- default:
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- STRANGE
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- return(NULL);
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- }
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+ ret = xmlXPtrNewRangeInternal(start, -1, endNode, endIndex);
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xmlXPtrRangeCheckOrder(ret);
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return(ret);
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}
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--
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2.11.0
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@ -74,6 +74,7 @@ things the parser might find in the XML document (like start tags).")
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(define-public libxml2
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(define-public libxml2
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(package
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(package
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(name "libxml2")
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(name "libxml2")
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(replacement libxml2/fixed)
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(version "2.9.4")
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(version "2.9.4")
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(source (origin
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(source (origin
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(method url-fetch)
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(method url-fetch)
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@ -101,6 +102,14 @@ things the parser might find in the XML document (like start tags).")
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project (but it is usable outside of the Gnome platform).")
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project (but it is usable outside of the Gnome platform).")
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(license license:x11)))
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(license license:x11)))
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(define libxml2/fixed
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(package
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(inherit libxml2)
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(source
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(origin
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(inherit (package-source libxml2))
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(patches (search-patches "libxml2-CVE-2016-4658.patch"))))))
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(define-public python-libxml2
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(define-public python-libxml2
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(package (inherit libxml2)
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(package (inherit libxml2)
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(name "python-libxml2")
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(name "python-libxml2")
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Reference in New Issue