libxml2: CVE-2015-8035

Fixes DoS when parsing specially crafted XML document
if XZ support is enabled.

References:
https://bugzilla.gnome.org/show_bug.cgi?id=757466

Upstream correction:
https://git.gnome.org/browse/libxml2/commit/?id=
f0709e3ca8f8947f2d91ed34e92e38a4c23eae63

(From OE-Core rev: e40cae30575a227bb0274869f720dffd816d629a)

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>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 36 insertions, 0 deletions

diff --git a/meta/recipes-core/libxml/libxml2.inc b/meta/recipes-core/libxml/libxml2.inc
index 15a2421c38..d5e263bdf8 100644
--- a/meta/recipes-core/libxml/libxml2.inc
+++ b/meta/recipes-core/libxml/libxml2.inc
@@ -24,6 +24,7 @@ SRC_URI = "ftp://xmlsoft.org/libxml2/libxml2-${PV}.tar.gz;name=libtar \
            file://libxml2-CVE-2014-3660.patch \
            file://0001-CVE-2015-1819-Enforce-the-reader-to-run-in-constant-.patch \
            file://CVE-2015-7942.patch \
+           file://CVE-2015-8035.patch \
           "
 
 BINCONFIG = "${bindir}/xml2-config"
diff --git a/meta/recipes-core/libxml/libxml2/CVE-2015-8035.patch b/meta/recipes-core/libxml/libxml2/CVE-2015-8035.patch
new file mode 100644
index 0000000000..d08693fa39
--- /dev/null
+++ b/meta/recipes-core/libxml/libxml2/CVE-2015-8035.patch
@@ -0,0 +1,35 @@
+From f0709e3ca8f8947f2d91ed34e92e38a4c23eae63 Mon Sep 17 00:00:00 2001
+From: Daniel Veillard <veillard@redhat.com>
+Date: Tue, 3 Nov 2015 15:31:25 +0800
+Subject: CVE-2015-8035 Fix XZ compression support loop
+
+For https://bugzilla.gnome.org/show_bug.cgi?id=757466
+DoS when parsing specially crafted XML document if XZ support
+is compiled in (which wasn't the case for 2.9.2 and master since
+Nov 2013, fixed in next commit !)
+
+Upstream-Status: Backport
+Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
+
+---
+ xzlib.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/xzlib.c b/xzlib.c
+index 0dcb9f4..1fab546 100644
+--- a/xzlib.c
++++ b/xzlib.c
+@@ -581,6 +581,10 @@ xz_decomp(xz_statep state)
+             xz_error(state, LZMA_DATA_ERROR, "compressed data error");
+             return -1;
+         }
++        if (ret == LZMA_PROG_ERROR) {
++            xz_error(state, LZMA_PROG_ERROR, "compression error");
++            return -1;
++        }
+     } while (strm->avail_out && ret != LZMA_STREAM_END);
+ 
+     /* update available output and crc check value */
+-- 
+cgit v0.11.2
+