xserver-xorg: fix CVE-2021-4010

Backport patch to fix CVE-2021-4010 for xserver-xorg.

CVE: CVE-2021-4010

(From OE-Core rev: 487971876baa9913541a187d98deddc00e60d3f8)

Signed-off-by: Kai Kang <kai.kang@windriver.com>
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 40 insertions, 0 deletions

diff --git a/meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2021-4010.patch b/meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2021-4010.patch
new file mode 100644
index 0000000000..06ebe7d077
--- /dev/null
+++ b/meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2021-4010.patch
@@ -0,0 +1,39 @@
+Backport patch to fix CVE-2021-4010.
+
+CVE: CVE-2021-4010
+Upstream-Status: Backport [https://gitlab.freedesktop.org/xorg/xserver/-/commit/6c4c530]
+
+Signed-off-by: Kai Kang <kai.kang@windriver.com>
+
+From 6c4c53010772e3cb4cb8acd54950c8eec9c00d21 Mon Sep 17 00:00:00 2001
+From: Povilas Kanapickas <povilas@radix.lt>
+Date: Tue, 14 Dec 2021 15:00:02 +0200
+Subject: [PATCH] Xext: Fix out of bounds access in SProcScreenSaverSuspend()
+
+ZDI-CAN-14951, CVE-2021-4010
+
+This vulnerability was discovered and the fix was suggested by:
+Jan-Niklas Sohn working with Trend Micro Zero Day Initiative
+
+Signed-off-by: Povilas Kanapickas <povilas@radix.lt>
+---
+ Xext/saver.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/Xext/saver.c b/Xext/saver.c
+index 1d7e3cadf..f813ba08d 100644
+--- a/Xext/saver.c
++++ b/Xext/saver.c
+@@ -1351,8 +1351,8 @@ SProcScreenSaverSuspend(ClientPtr client)
+     REQUEST(xScreenSaverSuspendReq);
+ 
+     swaps(&stuff->length);
+-    swapl(&stuff->suspend);
+     REQUEST_SIZE_MATCH(xScreenSaverSuspendReq);
++    swapl(&stuff->suspend);
+     return ProcScreenSaverSuspend(client);
+ }
+ 
+-- 
+GitLab
+
diff --git a/meta/recipes-graphics/xorg-xserver/xserver-xorg_1.20.10.bb b/meta/recipes-graphics/xorg-xserver/xserver-xorg_1.20.10.bb
index ac32bb25c2..84b0acb42f 100644
--- a/meta/recipes-graphics/xorg-xserver/xserver-xorg_1.20.10.bb
+++ b/meta/recipes-graphics/xorg-xserver/xserver-xorg_1.20.10.bb
@@ -11,6 +11,7 @@ SRC_URI += "file://0001-xf86pciBus.c-use-Intel-ddx-only-for-pre-gen4-hardwar.pat
            file://0001-hw-xwayland-Makefile.am-fix-build-without-glx.patch \
            file://CVE-2021-4008.patch \
            file://CVE-2021-4009.patch \
+           file://CVE-2021-4010.patch \
            "
 SRC_URI[sha256sum] = "977420c082450dc808de301ef56af4856d653eea71519a973c3490a780cb7c99"