[oe-commits] [openembedded-core] 22/24: libxml2: fix CVE-2018-9251 and CVE-2018-14567

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rpurdie pushed a commit to branch master-next
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commit 2b929653a01adf6316312e2cef27baf7addc0204
Author: Hongxu Jia <hongxu.jia at windriver.com>
AuthorDate: Fri Aug 17 15:22:41 2018 +0800

    libxml2: fix CVE-2018-9251 and CVE-2018-14567
    
    Signed-off-by: Hongxu Jia <hongxu.jia at windriver.com>
    Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>
---
 ...1-Fix-infinite-loop-in-LZMA-decompression.patch | 55 ++++++++++++++++++++++
 meta/recipes-core/libxml/libxml2_2.9.8.bb          |  1 +
 2 files changed, 56 insertions(+)

diff --git a/meta/recipes-core/libxml/libxml2/0001-Fix-infinite-loop-in-LZMA-decompression.patch b/meta/recipes-core/libxml/libxml2/0001-Fix-infinite-loop-in-LZMA-decompression.patch
new file mode 100644
index 0000000..16c2295
--- /dev/null
+++ b/meta/recipes-core/libxml/libxml2/0001-Fix-infinite-loop-in-LZMA-decompression.patch
@@ -0,0 +1,55 @@
+From 28a9dc642ffd759df1e48be247a114f440a6c16e Mon Sep 17 00:00:00 2001
+From: Nick Wellnhofer <wellnhofer at aevum.de>
+Date: Mon, 30 Jul 2018 13:14:11 +0200
+Subject: [PATCH] Fix infinite loop in LZMA decompression
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Check the liblzma error code more thoroughly to avoid infinite loops.
+
+Closes: https://gitlab.gnome.org/GNOME/libxml2/issues/13
+Closes: https://bugzilla.gnome.org/show_bug.cgi?id=794914
+
+This is CVE-2018-9251 and CVE-2018-14567.
+
+Thanks to Dongliang Mu and Simon Wörner for the reports.
+
+CVE: CVE-2018-9251
+CVE: CVE-2018-14567
+Upstream-Status: Backport [https://gitlab.gnome.org/GNOME/libxml2/commit/2240fbf5912054af025fb6e01e26375100275e74]
+Signed-off-by: Hongxu Jia <hongxu.jia at windriver.com>
+---
+ xzlib.c | 9 +++++++++
+ 1 file changed, 9 insertions(+)
+
+diff --git a/xzlib.c b/xzlib.c
+index a839169..0ba88cf 100644
+--- a/xzlib.c
++++ b/xzlib.c
+@@ -562,6 +562,10 @@ xz_decomp(xz_statep state)
+                          "internal error: inflate stream corrupt");
+                 return -1;
+             }
++            /*
++             * FIXME: Remapping a couple of error codes and falling through
++             * to the LZMA error handling looks fragile.
++             */
+             if (ret == Z_MEM_ERROR)
+                 ret = LZMA_MEM_ERROR;
+             if (ret == Z_DATA_ERROR)
+@@ -587,6 +591,11 @@ xz_decomp(xz_statep state)
+             xz_error(state, LZMA_PROG_ERROR, "compression error");
+             return -1;
+         }
++        if ((state->how != GZIP) &&
++            (ret != LZMA_OK) && (ret != LZMA_STREAM_END)) {
++            xz_error(state, ret, "lzma error");
++            return -1;
++        }
+     } while (strm->avail_out && ret != LZMA_STREAM_END);
+ 
+     /* update available output and crc check value */
+-- 
+2.7.4
+
diff --git a/meta/recipes-core/libxml/libxml2_2.9.8.bb b/meta/recipes-core/libxml/libxml2_2.9.8.bb
index 4ebd2ef..f01cb2c 100644
--- a/meta/recipes-core/libxml/libxml2_2.9.8.bb
+++ b/meta/recipes-core/libxml/libxml2_2.9.8.bb
@@ -22,6 +22,7 @@ SRC_URI = "http://www.xmlsoft.org/sources/libxml2-${PV}.tar.gz;name=libtar \
            file://fix-execution-of-ptests.patch \
            file://fix-CVE-2017-8872.patch \
            file://fix-CVE-2018-14404.patch \
+           file://0001-Fix-infinite-loop-in-LZMA-decompression.patch \
            "
 
 SRC_URI[libtar.md5sum] = "b786e353e2aa1b872d70d5d1ca0c740d"

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