54 lines
1.6 KiB
Diff
54 lines
1.6 KiB
Diff
Fix CVE-2017-0663:
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https://bugzilla.gnome.org/show_bug.cgi?id=780228 (not yet public)
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https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0663
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https://security-tracker.debian.org/tracker/CVE-2017-0663
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Patch copied from upstream source repository:
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https://git.gnome.org/browse/libxml2/commit/?id=92b9e8c8b3787068565a1820ba575d042f9eec66
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From 92b9e8c8b3787068565a1820ba575d042f9eec66 Mon Sep 17 00:00:00 2001
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From: Nick Wellnhofer <wellnhofer@aevum.de>
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Date: Tue, 6 Jun 2017 12:56:28 +0200
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Subject: [PATCH] Fix type confusion in xmlValidateOneNamespace
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Comment out code that casts xmlNsPtr to xmlAttrPtr. ID types on
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namespace declarations make no practical sense anyway.
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Fixes bug 780228.
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Found with libFuzzer and ASan.
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---
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valid.c | 7 +++++++
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1 file changed, 7 insertions(+)
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diff --git a/valid.c b/valid.c
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index 8075d3a0..c51ea290 100644
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--- a/valid.c
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+++ b/valid.c
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@@ -4627,6 +4627,12 @@ xmlNodePtr elem, const xmlChar *prefix, xmlNsPtr ns, const xmlChar *value) {
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}
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}
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+ /*
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+ * Casting ns to xmlAttrPtr is wrong. We'd need separate functions
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+ * xmlAddID and xmlAddRef for namespace declarations, but it makes
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+ * no practical sense to use ID types anyway.
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+ */
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+#if 0
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/* Validity Constraint: ID uniqueness */
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if (attrDecl->atype == XML_ATTRIBUTE_ID) {
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if (xmlAddID(ctxt, doc, value, (xmlAttrPtr) ns) == NULL)
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@@ -4638,6 +4644,7 @@ xmlNodePtr elem, const xmlChar *prefix, xmlNsPtr ns, const xmlChar *value) {
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if (xmlAddRef(ctxt, doc, value, (xmlAttrPtr) ns) == NULL)
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ret = 0;
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}
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+#endif
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/* Validity Constraint: Notation Attributes */
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if (attrDecl->atype == XML_ATTRIBUTE_NOTATION) {
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--
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2.14.1
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