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Accepting request 1030010 from X11:XOrg

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- U_xkb-proof-GetCountedString-against-request-length-at.patch
  * security update for CVE-2022-3550 (bsc#1204412)
- U_xkb-fix-some-possible-memleaks-in-XkbGetKbdByName.patch
  * security update for CVE-2022-3551 (bsc#1204416)

OBS-URL: https://build.opensuse.org/request/show/1030010
OBS-URL: https://build.opensuse.org/package/show/openSUSE:Factory/xwayland?expand=0&rev=14
This commit is contained in:
Dominique Leuenberger 2022-10-20 09:10:09 +00:00 committed by Git OBS Bridge
commit 068a23baf0
4 changed files with 97 additions and 1 deletions
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56
U_xkb-fix-some-possible-memleaks-in-XkbGetKbdByName.patch Normal file
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@ -0,0 +1,56 @@
From 18f91b950e22c2a342a4fbc55e9ddf7534a707d2 Mon Sep 17 00:00:00 2001
From: Peter Hutterer <peter.hutterer@who-t.net>
Date: Wed, 13 Jul 2022 11:23:09 +1000
Subject: [PATCH] xkb: fix some possible memleaks in XkbGetKbdByName
GetComponentByName returns an allocated string, so let's free that if we
fail somewhere.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
---
xkb/xkb.c | 26 ++++++++++++++++++++------
1 file changed, 20 insertions(+), 6 deletions(-)
Index: xwayland-22.1.3/xkb/xkb.c
===================================================================
--- xwayland-22.1.3.orig/xkb/xkb.c
+++ xwayland-22.1.3/xkb/xkb.c
@@ -5941,18 +5941,32 @@ ProcXkbGetKbdByName(ClientPtr client)
xkb = dev->key->xkbInfo->desc;
status = Success;
str = (unsigned char *) &stuff[1];
- if (GetComponentSpec(&str, TRUE, &status)) /* keymap, unsupported */
- return BadMatch;
+ {
+ char *keymap = GetComponentSpec(&str, TRUE, &status); /* keymap, unsupported */
+ if (keymap) {
+ free(keymap);
+ return BadMatch;
+ }
+ }
names.keycodes = GetComponentSpec(&str, TRUE, &status);
names.types = GetComponentSpec(&str, TRUE, &status);
names.compat = GetComponentSpec(&str, TRUE, &status);
names.symbols = GetComponentSpec(&str, TRUE, &status);
names.geometry = GetComponentSpec(&str, TRUE, &status);
- if (status != Success)
+ if (status == Success) {
+ len = str - ((unsigned char *) stuff);
+ if ((XkbPaddedSize(len) / 4) != stuff->length)
+ status = BadLength;
+ }
+
+ if (status != Success) {
+ free(names.keycodes);
+ free(names.types);
+ free(names.compat);
+ free(names.symbols);
+ free(names.geometry);
return status;
- len = str - ((unsigned char *) stuff);
- if ((XkbPaddedSize(len) / 4) != stuff->length)
- return BadLength;
+ }
CHK_MASK_LEGAL(0x01, stuff->want, XkbGBN_AllComponentsMask);
CHK_MASK_LEGAL(0x02, stuff->need, XkbGBN_AllComponentsMask);

31
U_xkb-proof-GetCountedString-against-request-length-at.patch Normal file
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@ -0,0 +1,31 @@
From 11beef0b7f1ed290348e45618e5fa0d2bffcb72e Mon Sep 17 00:00:00 2001
From: Peter Hutterer <peter.hutterer@who-t.net>
Date: Tue, 5 Jul 2022 12:06:20 +1000
Subject: [PATCH] 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>
---
xkb/xkb.c | 5 +++++
1 file changed, 5 insertions(+)
Index: xwayland-22.1.3/xkb/xkb.c
===================================================================
--- xwayland-22.1.3.orig/xkb/xkb.c
+++ xwayland-22.1.3/xkb/xkb.c
@@ -5138,6 +5138,11 @@ _GetCountedString(char **wire_inout, Cli
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);

8
xwayland.changes
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@ -1,3 +1,11 @@
-------------------------------------------------------------------
Wed Oct 19 11:19:40 UTC 2022 - Stefan Dirsch <sndirsch@suse.com>
- U_xkb-proof-GetCountedString-against-request-length-at.patch
* security update for CVE-2022-3550 (bsc#1204412)
- U_xkb-fix-some-possible-memleaks-in-XkbGetKbdByName.patch
* security update for CVE-2022-3551 (bsc#1204416)
-------------------------------------------------------------------
Tue Jul 12 14:22:22 UTC 2022 - Stefan Dirsch <sndirsch@suse.com>

3
xwayland.spec
View File

@ -33,7 +33,8 @@ Group: System/X11/Servers/XF86_4
Source0: %{url}/archive/individual/xserver/%{name}-%{version}.tar.xz
Source1: %{url}/archive/individual/xserver/%{name}-%{version}.tar.xz.sig
Source2: xwayland.keyring
Patch1204412: U_xkb-proof-GetCountedString-against-request-length-at.patch
Patch1204416: U_xkb-fix-some-possible-memleaks-in-XkbGetKbdByName.patch
BuildRequires: meson
BuildRequires: ninja
BuildRequires: pkgconfig