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libxml2: Fix CVE-2019-20388

Browse Source 
see:
https://gitlab.gnome.org/GNOME/libxml2/merge_requests/68

(From OE-Core rev: 6c4477563bc418ec215671d6960e6e8d6bdd074b)

Signed-off-by: Lee Chee Yang <chee.yang.lee@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Lee Chee Yang
2020-02-21 23:57:23 +02:00
committed by Richard Purdie
parent ca1f518147
commit b83baaf23d
2 changed files with 38 additions and 0 deletions
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37
meta/recipes-core/libxml/libxml2/CVE-2019-20388.patch Normal file
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@@ -0,0 +1,37 @@
From 7ffcd44d7e6c46704f8af0321d9314cd26e0e18a Mon Sep 17 00:00:00 2001
From: Zhipeng Xie <xiezhipeng1@huawei.com>
Date: Tue, 20 Aug 2019 16:33:06 +0800
Subject: [PATCH] Fix memory leak in xmlSchemaValidateStream
When ctxt->schema is NULL, xmlSchemaSAXPlug->xmlSchemaPreRun
alloc a new schema for ctxt->schema and set vctxt->xsiAssemble
to 1. Then xmlSchemaVStart->xmlSchemaPreRun initialize
vctxt->xsiAssemble to 0 again which cause the alloced schema
can not be freed anymore.
Found with libFuzzer.
Upstream-Status: Accepted [https://gitlab.gnome.org/GNOME/libxml2/commit/7ffcd44d7e6c46704f8af0321d9314cd26e0e18a]
CVE: CVE-2019-20388
Signed-off-by: Zhipeng Xie <xiezhipeng1@huawei.com>
Signed-off-by: Lee Chee Yang <chee.yang.lee@intel.com>
---
xmlschemas.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/xmlschemas.c b/xmlschemas.c
index 301c8449..39d92182 100644
--- a/xmlschemas.c
+++ b/xmlschemas.c
@@ -28090,7 +28090,6 @@ xmlSchemaPreRun(xmlSchemaValidCtxtPtr vctxt) {
vctxt->nberrors = 0;
vctxt->depth = -1;
vctxt->skipDepth = -1;
- vctxt->xsiAssemble = 0;
vctxt->hasKeyrefs = 0;
#ifdef ENABLE_IDC_NODE_TABLES_TEST
vctxt->createIDCNodeTables = 1;
--
2.24.1

1
meta/recipes-core/libxml/libxml2_2.9.8.bb
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@@ -25,6 +25,7 @@ SRC_URI = "http://www.xmlsoft.org/sources/libxml2-${PV}.tar.gz;name=libtar \
file://0001-Fix-infinite-loop-in-LZMA-decompression.patch \
file://fix-CVE-2019-19956.patch \
file://CVE-2020-7595.patch \
file://CVE-2019-20388.patch \
"
SRC_URI[libtar.md5sum] = "b786e353e2aa1b872d70d5d1ca0c740d"