[PATCH 17/20] libxml2: CVE-2015-8241

Armin Kuster
2016-01-10T00:31:15Z

From: Sona Sarmadi <sona.sarmadi@enea.com>

Upstream bug (contains reproducer):
https://bugzilla.gnome.org/show_bug.cgi?id=756263

Upstream patch:
https://git.gnome.org/browse/libxml2/commit/?id=
ab2b9a93ff19cedde7befbf2fcc48c6e352b6cbe

Signed-off-by: Tudor Florea <tudor.florea@enea.com>
Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
---
meta/recipes-core/libxml/libxml2.inc | 1 +
.../libxml/libxml2/CVE-2015-8241.patch | 41 ++++++++++++++++++++++
2 files changed, 42 insertions(+)
create mode 100644 meta/recipes-core/libxml/libxml2/CVE-2015-8241.patch

diff --git a/meta/recipes-core/libxml/libxml2.inc b/meta/recipes-core/libxml/libxml2.inc
index d5e263b..2dafeb4 100644
--- a/meta/recipes-core/libxml/libxml2.inc
+++ b/meta/recipes-core/libxml/libxml2.inc
@@ -25,6 +25,7 @@ SRC_URI = "ftp://xmlsoft.org/libxml2/libxml2-${PV}.tar.gz;name=libtar \
file://0001-CVE-2015-1819-Enforce-the-reader-to-run-in-constant-.patch \
file://CVE-2015-7942.patch \
file://CVE-2015-8035.patch \
+ file://CVE-2015-8241.patch \
"

BINCONFIG = "${bindir}/xml2-config"
diff --git a/meta/recipes-core/libxml/libxml2/CVE-2015-8241.patch b/meta/recipes-core/libxml/libxml2/CVE-2015-8241.patch
new file mode 100644
index 0000000..98b30f0
--- /dev/null
+++ b/meta/recipes-core/libxml/libxml2/CVE-2015-8241.patch
@@ -0,0 +1,41 @@
+From ab2b9a93ff19cedde7befbf2fcc48c6e352b6cbe Mon Sep 17 00:00:00 2001
+From: Hugh Davenport <hugh@allthethings.co.nz>
+Date: Tue, 3 Nov 2015 20:40:49 +0800
+Subject: Avoid extra processing of MarkupDecl when EOF
+
+For https://bugzilla.gnome.org/show_bug.cgi?id=756263
+
+One place where ctxt->instate == XML_PARSER_EOF whic was set up
+by entity detection issues doesn't get noticed, and even overrided
+
+Fixes CVE-2015-8241.
+
+Upstream-Status: Backport
+
+Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
+---
+ parser.c | 8 ++++++++
+ 1 file changed, 8 insertions(+)
+
+diff --git a/parser.c b/parser.c
+index d67b300..134afe7 100644
+--- a/parser.c
++++ b/parser.c
+@@ -6972,6 +6972,14 @@ xmlParseMarkupDecl(xmlParserCtxtPtr ctxt) {
+ xmlParsePI(ctxt);
+ }
+ }
++
++ /*
++ * detect requirement to exit there and act accordingly
++ * and avoid having instate overriden later on
++ */
++ if (ctxt->instate == XML_PARSER_EOF)
++ return;
++
+ /*
+ * This is only for internal subset. On external entities,
+ * the replacement is done before parsing stage
+--
+cgit v0.11.2
+
--
1.9.1