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ALSA-2024:0557 — Important: tigervnc security update

Affected: AlmaLinux:9: tigervnc, AlmaLinux:9: tigervnc-icons, AlmaLinux:9: tigervnc-license, AlmaLinux:9: tigervnc-selinux, AlmaLinux:9: tigervnc-server, AlmaLinux:9: tigervnc-server-minimal, AlmaLinux:9: tigervnc-server-module

Virtual Network Computing (VNC) is a remote display system which allows users to view a computing desktop environment not only on the machine where it is running, but from anywhere on the Internet and from a wide variety of machine architectures. TigerVNC is a suite of VNC servers and clients.

Security Fix(es):

* xorg-x11-server: Heap buffer overflow in DeviceFocusEvent and ProcXIQueryPointer (CVE-2023-6816) * xorg-x11-server: reattaching to different master device may lead to out-of-bounds memory access (CVE-2024-0229) * xorg-x11-server: heap buffer overflow in XISendDeviceHierarchyEvent (CVE-2024-21885) * xorg-x11-server: heap buffer overflow in DisableDevice (CVE-2024-21886)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

bdu:2024-00405

BELL-CVE-2023-6816

Affected: Alpaquita:23: xorg-server, Alpaquita:stream: xorg-server

EUVD-2026-276620

fkie_cve-2023-6816

A flaw was found in X.Org server. Both DeviceFocusEvent and the XIQueryPointer reply contain a bit for each logical button currently down. Buttons can be arbitrarily mapped to any value up to 255, but the X.Org Server was only allocating space for the device's particular number of buttons, leading to a heap overflow if a bigger value was used.

GHSA-pcjv-393q-rqf2

gsd-2023-6816

msrc_CVE-2023-6816 — Xorg-x11-server: heap buffer overflow in devicefocusevent and procxiquerypointer

msrc_CVE-2023-6816

OESA-2024-1102 — xorg-x11-server security update

Affected: openEuler:20.03-LTS-SP1: xorg-x11-server, openEuler:20.03-LTS-SP4: xorg-x11-server, openEuler:22.03-LTS: xorg-x11-server, openEuler:22.03-LTS-SP1: xorg-x11-server, openEuler:22.03-LTS-SP2: xorg-x11-server, openEuler:22.03-LTS-SP3: xorg-x11-server

X.Org X11 X server Security Fix(es): A flaw was found in X.Org server. Both DeviceFocusEvent and the XIQueryPointer reply contain a bit for each logical button currently down. Buttons can be arbitrarily mapped to any value up to 255, but the X.Org Server was only allocating space for the device's particular number of buttons, leading to a heap overflow if a bigger value was used.(CVE-2023-6816) An out-of-bounds memory access flaw was found in the X.Org server. This issue can be triggered when a device frozen by a sync grab is reattached to a different master device. This issue may lead to an application crash, local privilege escalation (if the server runs with extended privileges), or remote code execution in SSH X11 forwarding environments.(CVE-2024-0229) A flaw was found in the X.Org server. The GLX PBuffer code does not call the XACE hook when creating the buffer, leaving it unlabeled. When the client issues another request to access that resource (as with a GetGeometry) or when it creates another resource that needs to access that buffer, such as a GC, the XSELINUX code will try to use an object that was never labeled and crash because the SID is NULL.(CVE-2024-0408) A flaw was found in the X.Org server. The cursor code in both Xephyr and Xwayland uses the wrong type of private at creation. It uses the cursor bits type with the cursor as private, and when initiating the cursor, that overwrites the XSELINUX context.(CVE-2024-0409) A flaw was found…

openSUSE-SU-2024:13597-1 — xorg-x11-server-21.1.11-1.1 on GA media

xorg-x11-server-21.1.11-1.1 on GA media

RHSA-2024:0558 — Red Hat Security Advisory: tigervnc security update

xorg-x11-server: Heap buffer overflow in DeviceFocusEvent and ProcXIQueryPointer xorg-x11-server: reattaching to different master device may lead to out-of-bounds memory access xorg-x11-server: heap buffer overflow in XISendDeviceHierarchyEvent xorg-x11-server: heap buffer overflow in DisableDevice

SUSE-SU-2024:0109-1 — Security update for xorg-x11-server

Security update for xorg-x11-server

UBUNTU-CVE-2023-6816

Affected: Ubuntu:Pro:14.04:LTS: xorg-server, Ubuntu:Pro:16.04:LTS: xorg-server, Ubuntu:Pro:16.04:LTS: xorg-server-hwe-16.04, Ubuntu:Pro:18.04:LTS: xorg-server, Ubuntu:Pro:18.04:LTS: xorg-server-hwe-18.04, Ubuntu:20.04:LTS: xorg-server, Ubuntu:22.04:LTS: xorg-server, Ubuntu:22.04:LTS: xwayland, Ubuntu:24.04:LTS: xwayland

WID-SEC-W-2024-0127 — X.Org X11: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in X.Org X11 ausnutzen, um beliebigen Programmcode auszuführen, Informationen offenzulegen oder einen Denial of Service Zustand herbeizuführen.