diff options
Diffstat (limited to 'poky/meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2022-3550.patch')
-rw-r--r-- | poky/meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2022-3550.patch | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/poky/meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2022-3550.patch b/poky/meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2022-3550.patch new file mode 100644 index 0000000000..efec7b6b4e --- /dev/null +++ b/poky/meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2022-3550.patch @@ -0,0 +1,40 @@ +From d2dcbdc67c96c84dff301505072b0b7b022f1a14 Mon Sep 17 00:00:00 2001 +From: Peter Hutterer <peter.hutterer@who-t.net> +Date: Sun, 4 Dec 2022 17:40:21 +0000 +Subject: [PATCH 1/3] xkb: proof GetCountedString against request length + attacks + +GetCountedString did a check for the whole string to be within the +request buffer but not for the initial 2 bytes that contain the length +field. A swapped client could send a malformed request to trigger a +swaps() on those bytes, writing into random memory. + +Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> + +Ustream-Status: Backport [https://cgit.freedesktop.org/xorg/xserver/commit/?id=11beef0b7f1ed290348e45618e5fa0d2bffcb72e] +CVE: CVE-2022-3550 +Signed-off-by:Minjae Kim <flowergom@gmail.com> + +--- + xkb/xkb.c | 5 +++++ + 1 file changed, 5 insertions(+) + +diff --git a/xkb/xkb.c b/xkb/xkb.c +index 68c59df..bf8aaa3 100644 +--- a/xkb/xkb.c ++++ b/xkb/xkb.c +@@ -5138,6 +5138,11 @@ _GetCountedString(char **wire_inout, ClientPtr client, char **str) + CARD16 len; + + wire = *wire_inout; ++ ++ if (client->req_len < ++ bytes_to_int32(wire + 2 - (char *) client->requestBuffer)) ++ return BadValue; ++ + len = *(CARD16 *) wire; + if (client->swapped) { + swaps(&len); +-- +2.17.1 + |