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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 *)
42 lines
1.4 KiB
Diff
42 lines
1.4 KiB
Diff
From 26ef545b3502f61ca722a7a3373507e88ef64110 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] 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 4e2494b86b..b30da589e9 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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GitLab
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