Wed Mar 29 20:56:21 UTC 202320230329205621_15.0

patches/packages/glibc-zoneinfo-2023c-noarch-1_slack15.0.txz:  Upgraded.
  This package provides the latest timezone updates.
patches/packages/mozilla-thunderbird-102.9.1-x86_64-1_slack15.0.txz:  Upgraded.
  This release contains security fixes and improvements.
  For more information, see:
    https://www.mozilla.org/en-US/thunderbird/102.9.1/releasenotes/
    https://www.mozilla.org/en-US/security/advisories/mfsa2023-12/
    https://www.cve.org/CVERecord?id=CVE-2023-28427
  (* Security fix *)
patches/packages/xorg-server-1.20.14-x86_64-8_slack15.0.txz:  Rebuilt.
  [PATCH] composite: Fix use-after-free of the COW.
  Fix use-after-free that can lead to local privileges elevation on systems
  where the X server is running privileged and remote code execution for ssh
  X forwarding sessions.
  For more information, see:
    https://lists.x.org/archives/xorg-announce/2023-March/003374.html
    https://www.cve.org/CVERecord?id=CVE-2023-1393
  (* Security fix *)
patches/packages/xorg-server-xephyr-1.20.14-x86_64-8_slack15.0.txz:  Rebuilt.
patches/packages/xorg-server-xnest-1.20.14-x86_64-8_slack15.0.txz:  Rebuilt.
patches/packages/xorg-server-xvfb-1.20.14-x86_64-8_slack15.0.txz:  Rebuilt.
patches/packages/xorg-server-xwayland-21.1.4-x86_64-7_slack15.0.txz:  Rebuilt.
  [PATCH] composite: Fix use-after-free of the COW.
  Fix use-after-free that can lead to local privileges elevation on systems
  where the X server is running privileged and remote code execution for ssh
  X forwarding sessions.
  For more information, see:
    https://lists.x.org/archives/xorg-announce/2023-March/003374.html
    https://www.cve.org/CVERecord?id=CVE-2023-1393
  (* Security fix *)

1 files changed, 42 insertions, 0 deletions

diff --git a/patches/source/xorg-server-xwayland/CVE-2023-1393.patch b/patches/source/xorg-server-xwayland/CVE-2023-1393.patch
new file mode 100644
index 000000000..0d859d6c1
--- /dev/null
+++ b/patches/source/xorg-server-xwayland/CVE-2023-1393.patch
@@ -0,0 +1,42 @@
+From 26ef545b3502f61ca722a7a3373507e88ef64110 Mon Sep 17 00:00:00 2001
+From: Olivier Fourdan <ofourdan@redhat.com>
+Date: Mon, 13 Mar 2023 11:08:47 +0100
+Subject: [PATCH] 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 4e2494b86b..b30da589e9 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;
+ }
+-- 
+GitLab
+