xwayland: fix CVE-2023-5367

(From OE-Core rev: 9c21b08c18414bb61abebcbbb8704946ea288a7b)

Signed-off-by: Lee Chee Yang <chee.yang.lee@intel.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

2 files changed, 88 insertions, 1 deletions

diff --git a/meta/recipes-graphics/xwayland/xwayland/CVE-2023-5367.patch b/meta/recipes-graphics/xwayland/xwayland/CVE-2023-5367.patch
new file mode 100644
index 0000000000..d4da1ecb4b
--- /dev/null
+++ b/meta/recipes-graphics/xwayland/xwayland/CVE-2023-5367.patch
@@ -0,0 +1,85 @@
+CVE: CVE-2023-5367
+Upstream-Status: Backport [ https://gitlab.freedesktop.org/xorg/xserver/-/commit/541ab2ecd41d4d8689e71855d93e492bc554719a ]
+Signed-off-by: Lee Chee Yang <chee.yang.lee@intel.com>
+
+
+From 541ab2ecd41d4d8689e71855d93e492bc554719a Mon Sep 17 00:00:00 2001
+From: Peter Hutterer <peter.hutterer@who-t.net>
+Date: Tue, 3 Oct 2023 11:53:05 +1000
+Subject: [PATCH] Xi/randr: fix handling of PropModeAppend/Prepend
+
+The handling of appending/prepending properties was incorrect, with at
+least two bugs: the property length was set to the length of the new
+part only, i.e. appending or prepending N elements to a property with P
+existing elements always resulted in the property having N elements
+instead of N + P.
+
+Second, when pre-pending a value to a property, the offset for the old
+values was incorrect, leaving the new property with potentially
+uninitalized values and/or resulting in OOB memory writes.
+For example, prepending a 3 element value to a 5 element property would
+result in this 8 value array:
+  [N, N, N, ?, ?, P, P, P ] P, P
+                            ^OOB write
+
+The XI2 code is a copy/paste of the RandR code, so the bug exists in
+both.
+
+CVE-2023-5367, ZDI-CAN-22153
+
+This vulnerability was discovered by:
+Jan-Niklas Sohn working with Trend Micro Zero Day Initiative
+
+Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
+---
+ Xi/xiproperty.c    | 4 ++--
+ randr/rrproperty.c | 4 ++--
+ 2 files changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/Xi/xiproperty.c b/Xi/xiproperty.c
+index 066ba21fba..d315f04d0e 100644
+--- a/Xi/xiproperty.c
++++ b/Xi/xiproperty.c
+@@ -730,7 +730,7 @@ XIChangeDeviceProperty(DeviceIntPtr dev, Atom property, Atom type,
+                 XIDestroyDeviceProperty(prop);
+             return BadAlloc;
+         }
+-        new_value.size = len;
++        new_value.size = total_len;
+         new_value.type = type;
+         new_value.format = format;
+ 
+@@ -747,7 +747,7 @@ XIChangeDeviceProperty(DeviceIntPtr dev, Atom property, Atom type,
+         case PropModePrepend:
+             new_data = new_value.data;
+             old_data = (void *) (((char *) new_value.data) +
+-                                  (prop_value->size * size_in_bytes));
++                                  (len * size_in_bytes));
+             break;
+         }
+         if (new_data)
+diff --git a/randr/rrproperty.c b/randr/rrproperty.c
+index c2fb9585c6..25469f57b2 100644
+--- a/randr/rrproperty.c
++++ b/randr/rrproperty.c
+@@ -209,7 +209,7 @@ RRChangeOutputProperty(RROutputPtr output, Atom property, Atom type,
+                 RRDestroyOutputProperty(prop);
+             return BadAlloc;
+         }
+-        new_value.size = len;
++        new_value.size = total_len;
+         new_value.type = type;
+         new_value.format = format;
+ 
+@@ -226,7 +226,7 @@ RRChangeOutputProperty(RROutputPtr output, Atom property, Atom type,
+         case PropModePrepend:
+             new_data = new_value.data;
+             old_data = (void *) (((char *) new_value.data) +
+-                                  (prop_value->size * size_in_bytes));
++                                  (len * size_in_bytes));
+             break;
+         }
+         if (new_data)
+-- 
+GitLab
+
diff --git a/meta/recipes-graphics/xwayland/xwayland_22.1.8.bb b/meta/recipes-graphics/xwayland/xwayland_22.1.8.bb
index 6919ba421b..94797be8e0 100644
--- a/meta/recipes-graphics/xwayland/xwayland_22.1.8.bb
+++ b/meta/recipes-graphics/xwayland/xwayland_22.1.8.bb
@@ -9,7 +9,9 @@ HOMEPAGE = "https://fedoraproject.org/wiki/Changes/XwaylandStandalone"
 LICENSE = "MIT"
 LIC_FILES_CHKSUM = "file://COPYING;md5=5df87950af51ac2c5822094553ea1880"
 
-SRC_URI = "https://www.x.org/archive/individual/xserver/xwayland-${PV}.tar.xz"
+SRC_URI = "https://www.x.org/archive/individual/xserver/xwayland-${PV}.tar.xz \
+           file://CVE-2023-5367.patch \
+"
 SRC_URI[sha256sum] = "d11eeee73290b88ea8da42a7d9350dedfaba856ce4ae44e58c045ad9ecaa2f73"
 
 UPSTREAM_CHECK_REGEX = "xwayland-(?P<pver>\d+(\.(?!90\d)\d+)+)\.tar"