Compare commits
No commits in common. "c8" and "c8s" have entirely different histories.
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@ -1,28 +0,0 @@
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From 774c6bcf33b5c9b94c1ff12895775e77c555decc Mon Sep 17 00:00:00 2001
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From: Pierre Ossman <ossman@cendio.se>
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Date: Thu, 9 Feb 2023 11:30:37 +0100
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Subject: [PATCH] Sanity check when cleaning up keymap changes
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Make sure we don't send a bogus request to the X server in the (common)
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case that we don't actually have anything to restore.
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(cherry picked from commit 1e3484f2017f038dd5149cd50741feaf39a680e4)
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---
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unix/x0vncserver/XDesktop.cxx | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/unix/x0vncserver/XDesktop.cxx b/unix/x0vncserver/XDesktop.cxx
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index d5c6b2db9..f9c810968 100644
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--- a/unix/x0vncserver/XDesktop.cxx
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+++ b/unix/x0vncserver/XDesktop.cxx
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@@ -481,6 +481,10 @@ void XDesktop::deleteAddedKeysyms(Display* dpy) {
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}
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}
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+ // Did we actually find something to remove?
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+ if (highestKeyCode < lowestKeyCode)
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+ return;
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+
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changes.changed |= XkbKeySymsMask;
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changes.first_key_sym = lowestKeyCode;
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changes.num_key_syms = highestKeyCode - lowestKeyCode + 1;
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@ -1,31 +0,0 @@
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From 717d787de8f913070446444e37d552b51f05515e Mon Sep 17 00:00:00 2001
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From: Zdenek Pytela <zpytela@redhat.com>
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Date: Mon, 16 Jan 2023 12:35:40 +0100
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Subject: [PATCH] SELinux: Allow vncsession create ~/.vnc directory
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Addresses the following AVC denial:
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type=PROCTITLE msg=audit(01/12/2023 02:58:12.648:696) : proctitle=/usr/sbin/vncsession fedora :1
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type=PATH msg=audit(01/12/2023 02:58:12.648:696) : item=1 name=/home/fedora/.vnc nametype=CREATE cap_fp=none cap_fi=none cap_fe=0 cap_fver=0 cap_frootid=0
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type=PATH msg=audit(01/12/2023 02:58:12.648:696) : item=0 name=/home/fedora/ inode=262145 dev=fc:02 mode=dir,700 ouid=fedora ogid=fedora rdev=00:00 obj=unconfined_u:object_r:user_home_dir_t:s0 nametype=PARENT cap_fp=none cap_fi=none cap_fe=0 cap_fver=0 cap_frootid=0
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type=CWD msg=audit(01/12/2023 02:58:12.648:696) : cwd=/home/fedora
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type=SYSCALL msg=audit(01/12/2023 02:58:12.648:696) : arch=x86_64 syscall=mkdir success=no exit=EACCES(Permission denied) a0=0x7fff47d52540 a1=0755 a2=0x0 a3=0x0 items=2 ppid=2869 pid=2880 auid=fedora uid=fedora gid=fedora euid=fedora suid=fedora fsuid=fedora egid=fedora sgid=fedora fsgid=fedora tty=(none) ses=8 comm=vncsession exe=/usr/sbin/vncsession subj=system_u:system_r:vnc_session_t:s0 key=(null)
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type=AVC msg=audit(01/12/2023 02:58:12.648:696) : avc: denied { create } for pid=2880 comm=vncsession name=.vnc scontext=system_u:system_r:vnc_session_t:s0 tcontext=system_u:object_r:vnc_home_t:s0 tclass=dir permissive=0
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Resolves: rhbz#2143704
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---
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unix/vncserver/selinux/vncsession.te | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/unix/vncserver/selinux/vncsession.te b/unix/vncserver/selinux/vncsession.te
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index fb966c14b..680be8ea1 100644
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--- a/unix/vncserver/selinux/vncsession.te
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+++ b/unix/vncserver/selinux/vncsession.te
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@@ -37,6 +37,7 @@ allow vnc_session_t self:fifo_file rw_fifo_file_perms;
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allow vnc_session_t vnc_session_var_run_t:file manage_file_perms;
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files_pid_filetrans(vnc_session_t, vnc_session_var_run_t, file)
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+create_dirs_pattern(vnc_session_t, vnc_home_t, vnc_home_t)
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manage_files_pattern(vnc_session_t, vnc_home_t, vnc_home_t)
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manage_fifo_files_pattern(vnc_session_t, vnc_home_t, vnc_home_t)
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manage_sock_files_pattern(vnc_session_t, vnc_home_t, vnc_home_t)
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@ -1,42 +0,0 @@
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From 947bd1b3f4a23565bf10879ec41ba06ebe1e1c76 Mon Sep 17 00:00:00 2001
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From: Olivier Fourdan <ofourdan@redhat.com>
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Date: Mon, 13 Mar 2023 11:08:47 +0100
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Subject: [PATCH xserver] composite: Fix use-after-free of the COW
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ZDI-CAN-19866/CVE-2023-1393
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If a client explicitly destroys the compositor overlay window (aka COW),
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we would leave a dangling pointer to that window in the CompScreen
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structure, which will trigger a use-after-free later.
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Make sure to clear the CompScreen pointer to the COW when the latter gets
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destroyed explicitly by the client.
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This vulnerability was discovered by:
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Jan-Niklas Sohn working with Trend Micro Zero Day Initiative
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Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
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Reviewed-by: Adam Jackson <ajax@redhat.com>
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---
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composite/compwindow.c | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/composite/compwindow.c b/composite/compwindow.c
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index 4e2494b86..b30da589e 100644
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--- a/composite/compwindow.c
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+++ b/composite/compwindow.c
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@@ -620,6 +620,11 @@ compDestroyWindow(WindowPtr pWin)
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ret = (*pScreen->DestroyWindow) (pWin);
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cs->DestroyWindow = pScreen->DestroyWindow;
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pScreen->DestroyWindow = compDestroyWindow;
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+
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+ /* Did we just destroy the overlay window? */
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+ if (pWin == cs->pOverlayWin)
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+ cs->pOverlayWin = NULL;
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+
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/* compCheckTree (pWin->drawable.pScreen); can't check -- tree isn't good*/
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return ret;
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}
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--
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2.40.0
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@ -5,7 +5,7 @@
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Name: tigervnc
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Version: 1.12.0
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Release: 15%{?dist}
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Release: 9%{?dist}
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Summary: A TigerVNC remote display system
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%global _hardened_build 1
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@ -31,17 +31,14 @@ Patch53: tigervnc-vncsession-restore-script-systemd-service.patch
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# https://github.com/TigerVNC/tigervnc/pull/1513
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Patch54: tigervnc-fix-ghost-cursor-in-zaphod-mode.patch
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# https://github.com/TigerVNC/tigervnc/pull/1510
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Patch55: tigervnc-add-new-keycodes-for-unknown-keysyms.patch
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Patch56: tigervnc-sanity-check-when-cleaning-up-keymap-changes.patch
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Patch57: tigervnc-selinux-allow-vncsession-create-vnc-directory.patch
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Patch55: tigervnc-add-new-keycodes-for-unknown-keysyms.patch
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# This is tigervnc-%%{version}/unix/xserver116.patch rebased on the latest xorg
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Patch100: tigervnc-xserver120.patch
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# 1326867 - [RHEL7.3] GLX applications in an Xvnc session fails to start
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Patch101: 0001-rpath-hack.patch
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# CVE-2023-1393 tigervnc: xorg-x11-server: X.Org Server Overlay Window Use-After-Free Local Privilege Escalation Vulnerability
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Patch110: xorg-x11-server-composite-Fix-use-after-free-of-the-COW.patch
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# Upstreamable patches
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BuildRequires: gcc-c++
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BuildRequires: libX11-devel, automake, autoconf, libtool, gettext, gettext-autopoint
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@ -164,7 +161,6 @@ for all in `find . -type f -perm -001`; do
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done
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%patch100 -p1 -b .xserver120-rebased
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%patch101 -p1 -b .rpath
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%patch110 -p1 -b .composite-Fix-use-after-free-of-the-COW
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popd
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%patch1 -p1 -b .use-gnome-as-default-session
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@ -176,8 +172,7 @@ popd
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%patch53 -p1 -b .vncsession-restore-script-systemd-service
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%patch54 -p1 -b .fix-ghost-cursor-in-zaphod-mode
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%patch55 -p1 -b .add-new-keycodes-for-unknown-keysyms
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%patch56 -p1 -b .sanity-check-when-cleaning-up-keymap-changes
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%patch57 -p1 -b .selinux-allow-vncsession-create-vnc-directory
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%build
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%ifarch sparcv9 sparc64 s390 s390x
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@ -332,34 +327,6 @@ fi
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%ghost %verify(not md5 size mtime) %{_sharedstatedir}/selinux/%{selinuxtype}/active/modules/200/%{modulename}
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%changelog
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*Mon Mar 27 2023 Jan Grulich <jgrulich@redhat.com> - 1.12.0-15
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- xorg-x11-server: X.Org Server Overlay Window Use-After-Free Local Privilege Escalation Vulnerability
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Resolves: bz#2180305
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* Tue Feb 21 2023 Jan Grulich <jgrulich@redhat.com> - 1.12.0-14
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- SELinux: allow vncsession create .vnc directory
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Resolves: bz#2164704
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* Wed Feb 15 2023 Jan Grulich <jgrulich@redhat.com> - 1.12.0-13
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- Add sanity check when cleaning up keymap changes
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Resolves: bz#2169960
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* Mon Feb 06 2023 Jan Grulich <jgrulich@redhat.com> - 1.12.0-12
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- xorg-x11-server: DeepCopyPointerClasses use-after-free leads to privilege elevation
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Resolves: bz#2167058
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* Tue Dec 20 2022 Tomas Popela <tpopela@redhat.com> - 1.12.0-11
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- Rebuild for xorg-x11-server CVE-2022-46340 follow up fix
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* Fri Dec 16 2022 Jan Grulich <jgrulich@redhat.com> - 1.12.0-10
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- Rebuild for xorg-x11-server CVEs
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Resolves: CVE-2022-4283 (bz#2154233)
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Resolves: CVE-2022-46340 (bz#2154220)
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Resolves: CVE-2022-46341 (bz#2154223)
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Resolves: CVE-2022-46342 (bz#2154225)
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Resolves: CVE-2022-46343 (bz#2154227)
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Resolves: CVE-2022-46344 (bz#2154229)
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* Thu Dec 08 2022 Jan Grulich <jgrulich@redhat.com> - 1.12.0-9
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- Bump build version to fix upgrade path
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Resolves: bz#1437569
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Reference in New Issue