xwayland: Fix CVE-2024-9632

Reference:
https://nvd.nist.gov/vuln/detail/CVE-2024-9632

Upstream patch:
https://gitlab.freedesktop.org/xorg/xserver/-/commit/ba1d14f8eff2a123bd7ff4d48c02e1d5131358e0

(From OE-Core rev: 634a10db7da46688413d26f3fc9d5510f239b40b)

Signed-off-by: Vijay Anusuri <vanusuri@mvista.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

2 files changed, 62 insertions, 1 deletions

diff --git a/meta/recipes-graphics/xwayland/xwayland/CVE-2024-9632.patch b/meta/recipes-graphics/xwayland/xwayland/CVE-2024-9632.patch
new file mode 100644
index 0000000000..54888f6347
--- /dev/null
+++ b/meta/recipes-graphics/xwayland/xwayland/CVE-2024-9632.patch
@@ -0,0 +1,59 @@
+From ba1d14f8eff2a123bd7ff4d48c02e1d5131358e0 Mon Sep 17 00:00:00 2001
+From: Matthieu Herrb <matthieu@herrb.eu>
+Date: Thu, 10 Oct 2024 10:37:28 +0200
+Subject: [PATCH] xkb: Fix buffer overflow in _XkbSetCompatMap()
+
+The _XkbSetCompatMap() function attempts to resize the `sym_interpret`
+buffer.
+
+However, It didn't update its size properly. It updated `num_si` only,
+without updating `size_si`.
+
+This may lead to local privilege escalation if the server is run as root
+or remote code execution (e.g. x11 over ssh).
+
+CVE-2024-9632, ZDI-CAN-24756
+
+This vulnerability was discovered by:
+Jan-Niklas Sohn working with Trend Micro Zero Day Initiative
+
+Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
+Tested-by: Peter Hutterer <peter.hutterer@who-t.net>
+Reviewed-by: José Expósito <jexposit@redhat.com>
+(cherry picked from commit 85b77657)
+
+Part-of: <!1734>
+
+CVE: CVE-2024-9632
+Upstream-Status: Backport [https://gitlab.freedesktop.org/xorg/xserver/-/commit/ba1d14f8eff2a123bd7ff4d48c02e1d5131358e0]
+
+Signed-off-by: Yogita Urade <yogita.urade@windriver.com>
+Signed-off-by: Vijay Anusuri <vanusuri@mvista.com>
+---
+ xkb/xkb.c | 8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/xkb/xkb.c b/xkb/xkb.c
+index 276dc19..7da00a0 100644
+--- a/xkb/xkb.c
++++ b/xkb/xkb.c
+@@ -2992,13 +2992,13 @@ _XkbSetCompatMap(ClientPtr client, DeviceIntPtr dev,
+         XkbSymInterpretPtr sym;
+         unsigned int skipped = 0;
+
+-        if ((unsigned) (req->firstSI + req->nSI) > compat->num_si) {
+-            compat->num_si = req->firstSI + req->nSI;
++        if ((unsigned) (req->firstSI + req->nSI) > compat->size_si) {
++            compat->num_si = compat->size_si = req->firstSI + req->nSI;
+             compat->sym_interpret = reallocarray(compat->sym_interpret,
+-                                                 compat->num_si,
++                                                 compat->size_si,
+                                                  sizeof(XkbSymInterpretRec));
+             if (!compat->sym_interpret) {
+-                compat->num_si = 0;
++                compat->num_si = compat->size_si = 0;
+                 return BadAlloc;
+             }
+         }
+--
+2.40.0
diff --git a/meta/recipes-graphics/xwayland/xwayland_23.2.5.bb b/meta/recipes-graphics/xwayland/xwayland_23.2.5.bb
index b934a873d1..c88fdb6e9f 100644
--- a/meta/recipes-graphics/xwayland/xwayland_23.2.5.bb
+++ b/meta/recipes-graphics/xwayland/xwayland_23.2.5.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-2024-9632.patch \
+"
 SRC_URI[sha256sum] = "33ec7ff2687a59faaa52b9b09aa8caf118e7ecb6aed8953f526a625ff9f4bd90"
 
 UPSTREAM_CHECK_REGEX = "xwayland-(?P<pver>\d+(\.(?!90\d)\d+)+)\.tar"