libxml2: Fix CVEs

CVE: CVE-2017-16932 CVE-2017-5130 CVE-2017-7375 CVE-2017-7376

Libxml2 in the upstream pyro is 2.9.4
CVE-2017-7376: For the stable distribution (stretch), these problems
have been fixed in version 2.9.4+dfsg1-2.2+deb9u1
CVE-2017-7375: stretch (security) 2.9.4+dfsg1-2.2+deb9u2

Reference:
CVE-2017-16932 https://github.com/GNOME/libxml2/commit/899a5d9f0ed13b8e32449a08a361e0de127dd961
CVE-2017-5130 https://gitlab.gnome.org/GNOME/libxml2/commit/897dffbae322b46b83f99a607d527058a72c51ed
CVE-2017-7375 https://gitlab.gnome.org/GNOME/libxml2/commit/90ccb58242866b0ba3edbef8fe44214a101c2b3e
CVE-2017-7376 https://gitlab.gnome.org/GNOME/libxml2/commit/5dca9eea1bd4263bfa4d037ab2443de1cd730f7e

Change-Id: Icf68eea8e0916be2bc9f3e844f7d38f6fae75300
Signed-off-by: Andreas Wellving <andreas.wellving@enea.com>
Signed-off-by: Adrian Mangeac <adrian.mangeac@enea.com>

1 files changed, 40 insertions, 0 deletions

diff --git a/recipes-core/libxml/libxml2/CVE-2017-7375-Prevent-unwanted-external-entity-reference.patch b/recipes-core/libxml/libxml2/CVE-2017-7375-Prevent-unwanted-external-entity-reference.patch
new file mode 100644
index 0000000..252929c
--- /dev/null
+++ b/recipes-core/libxml/libxml2/CVE-2017-7375-Prevent-unwanted-external-entity-reference.patch
@@ -0,0 +1,40 @@
+From 90ccb58242866b0ba3edbef8fe44214a101c2b3e Mon Sep 17 00:00:00 2001
+From: Neel Mehta <nmehta@google.com>
+Date: Fri, 7 Apr 2017 17:43:02 +0200
+Subject: [PATCH] Prevent unwanted external entity reference
+
+For https://bugzilla.gnome.org/show_bug.cgi?id=780691
+
+* parser.c: add a specific check to avoid PE reference
+
+CVE: CVE-2018-7375
+Upstream-Status: Backport [https://gitlab.gnome.org/GNOME/libxml2/commit/90ccb58242866b0ba3edbef8fe44214a101c2b3e]
+
+Signed-off-by: Andreas Wellving <andreas.wellving@enea.com>
+---
+ parser.c | 9 +++++++++
+ 1 file changed, 9 insertions(+)
+
+diff --git a/parser.c b/parser.c
+index 609a270..c2c812d 100644
+--- a/parser.c
++++ b/parser.c
+@@ -8123,6 +8123,15 @@ xmlParsePEReference(xmlParserCtxtPtr ctxt)
+            if (xmlPushInput(ctxt, input) < 0)
+                return;
+        } else {
++           if ((entity->etype == XML_EXTERNAL_PARAMETER_ENTITY) &&
++               ((ctxt->options & XML_PARSE_NOENT) == 0) &&
++               ((ctxt->options & XML_PARSE_DTDVALID) == 0) &&
++               ((ctxt->options & XML_PARSE_DTDLOAD) == 0) &&
++               ((ctxt->options & XML_PARSE_DTDATTR) == 0) &&
++               (ctxt->replaceEntities == 0) &&
++               (ctxt->validate == 0))
++               return;
++
+            /*
+             * TODO !!!
+             * handle the extra spaces added before and after
+-- 
+2.7.4
+