Dominique Leuenberger 2023-04-02 17:16:56 +00:00 committed by Git OBS Bridge
commit b8eaf40ba1
9 changed files with 20 additions and 71 deletions

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@ -1,42 +0,0 @@
From 947bd1b3f4a23565bf10879ec41ba06ebe1e1c76 Mon Sep 17 00:00:00 2001
From: Olivier Fourdan <ofourdan@redhat.com>
Date: Mon, 13 Mar 2023 11:08:47 +0100
Subject: [PATCH xserver] composite: Fix use-after-free of the COW
ZDI-CAN-19866/CVE-2023-1393
If a client explicitly destroys the compositor overlay window (aka COW),
we would leave a dangling pointer to that window in the CompScreen
structure, which will trigger a use-after-free later.
Make sure to clear the CompScreen pointer to the COW when the latter gets
destroyed explicitly by the client.
This vulnerability was discovered by:
Jan-Niklas Sohn working with Trend Micro Zero Day Initiative
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
---
composite/compwindow.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/composite/compwindow.c b/composite/compwindow.c
index 4e2494b86..b30da589e 100644
--- a/composite/compwindow.c
+++ b/composite/compwindow.c
@@ -620,6 +620,11 @@ compDestroyWindow(WindowPtr pWin)
ret = (*pScreen->DestroyWindow) (pWin);
cs->DestroyWindow = pScreen->DestroyWindow;
pScreen->DestroyWindow = compDestroyWindow;
+
+ /* Did we just destroy the overlay window? */
+ if (pWin == cs->pOverlayWin)
+ cs->pOverlayWin = NULL;
+
/* compCheckTree (pWin->drawable.pScreen); can't check -- tree isn't good*/
return ret;
}
--
2.40.0

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<services>
<service name="tar_scm" mode="disabled">
<param name="url">https://gitlab.freedesktop.org/xorg/xserver.git</param>
<param name="scm">git</param>
<param name="revision">xorg-server-21.1.6</param>
<param name="versionformat">@PARENT_TAG@</param>
<param name="versionrewrite-pattern">xorgserver(.*)</param>
<param name="changesgenerate">enable</param>
</service>
<service name="recompress" mode="disabled">
<param name="file">*.tar</param>
<param name="compression">xz</param>
</service>
<service mode="disabled" name="set_version" />
</services>

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@ -1,4 +0,0 @@
<servicedata>
<service name="tar_scm">
<param name="url">https://gitlab.freedesktop.org/xorg/xserver.git</param>
<param name="changesrevision">59b6fc88ed9f4b22397a568c2483e4c558856ffa</param></service></servicedata>

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@ -1,3 +0,0 @@
version https://git-lfs.github.com/spec/v1
oid sha256:d9c60b2dd0ec52326ca6ab20db0e490b1ff4f566f59ca742d6532e92795877bb
size 4933292

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version https://git-lfs.github.com/spec/v1
oid sha256:38aadb735650c8024ee25211c190bf8aad844c5f59632761ab1ef4c4d5aeb152
size 4980208

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@ -1,3 +1,16 @@
-------------------------------------------------------------------
Sat Apr 1 13:42:37 UTC 2023 - Bjørn Lie <bjorn.lie@gmail.com>
- Update to version 21.1.8 (CVE-2023-1393):
* This release contains the fix for CVE-2023-1393
* composite: Fix use-after-free of the COW
* xkbUtils: use existing symbol names instead of deleted
deprecated ones
- Drop U_xserver-composite-Fix-use-after-free-of-the-COW.patch:
Fixed upstream
- Switch back to tarball release, drop source service, add keyring
and sig files.
-------------------------------------------------------------------
Wed Mar 22 13:48:21 UTC 2023 - Stefan Dirsch <sndirsch@suse.com>

BIN
xorg-x11-server.keyring Normal file

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@ -36,14 +36,15 @@
%endif
Name: xorg-x11-server
Version: 21.1.7
Version: 21.1.8
Release: 0
URL: http://xorg.freedesktop.org/
Summary: X
# Source URL: http://xorg.freedesktop.org/archive/individual/xserver/
License: MIT
Group: System/X11/Servers/XF86_4
Source0: xorg-server-%{version}.tar.xz
Source0: https://xorg.freedesktop.org/archive/individual/xserver/xorg-server-%{version}.tar.xz
Source10: https://xorg.freedesktop.org/archive/individual/xserver/xorg-server-%{version}.tar.xz.sig
Source11: xorg-x11-server.keyring
Source1: sysconfig.displaymanager.template
Source2: README.updates
Source3: xorgcfg.tar.bz2
@ -242,8 +243,6 @@ Patch1940: U_xephyr-Don-t-check-for-SeatId-anymore.patch
Patch1960: u_sync-pci-ids-with-Mesa.patch
Patch1209543: U_xserver-composite-Fix-use-after-free-of-the-COW.patch
%description
This package contains the X.Org Server.
@ -402,8 +401,6 @@ sh %{SOURCE92} --verify . %{SOURCE91}
%patch1940 -p1
%patch1960 -p1
%patch1209543 -p1
%build
# We have some -z now related errors during X default startup (boo#1197994):
# - when loading modesetting: gbm_bo_get_plane_count