libxml2: Security fix CVE-2015-8241

CVE-2015-8241 libxml2: Buffer overread with XML parser in xmlNextChar

(From OE-Core rev: f3c19a39cdec435f26a7f46a3432231ba4daa19c)

Signed-off-by: Armin Kuster <akuster@mvista.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 41 insertions, 0 deletions

diff --git a/meta/recipes-core/libxml/libxml2.inc b/meta/recipes-core/libxml/libxml2.inc
index b9ce0f0359..bced950fa9 100644
--- a/meta/recipes-core/libxml/libxml2.inc
+++ b/meta/recipes-core/libxml/libxml2.inc
@@ -35,6 +35,7 @@ SRC_URI = "ftp://xmlsoft.org/libxml2/libxml2-${PV}.tar.gz;name=libtar \
            file://0001-CVE-2015-7500-Fix-memory-access-error-due-to-incorre.patch \
            file://0001-CVE-2015-8242-Buffer-overead-with-HTML-parser-in-pus.patch \
            file://0001-CVE-2015-5312-Another-entity-expansion-issue.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 0000000000..89a46ad173
--- /dev/null
+++ b/meta/recipes-core/libxml/libxml2/CVE-2015-8241.patch
@@ -0,0 +1,40 @@
+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: [PATCH] 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
+
+Upstream-status: Backport
+
+https://git.gnome.org/browse/libxml2/commit/?id=ab2b9a93ff19cedde7befbf2fcc48c6e352b6cbe
+
+CVE: CVE-2015-8241
+Signed-off-by: Armin Kuster <akuster@mvista.com>
+
+---
+ parser.c | 8 ++++++++
+ 1 file changed, 8 insertions(+)
+
+Index: libxml2-2.9.2/parser.c
+===================================================================
+--- libxml2-2.9.2.orig/parser.c
++++ libxml2-2.9.2/parser.c
+@@ -6999,6 +6999,14 @@ 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