Summary
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.
Fixed packages 7
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux · 9 | tigervnc | 1.13.1-3.el9_3.6.alma.1 |
| AlmaLinux · 9 | tigervnc-icons | 1.13.1-3.el9_3.6.alma.1 |
| AlmaLinux · 9 | tigervnc-license | 1.13.1-3.el9_3.6.alma.1 |
| AlmaLinux · 9 | tigervnc-selinux | 1.13.1-3.el9_3.6.alma.1 |
| AlmaLinux · 9 | tigervnc-server | 1.13.1-3.el9_3.6.alma.1 |
| AlmaLinux · 9 | tigervnc-server-minimal | 1.13.1-3.el9_3.6.alma.1 |
| AlmaLinux · 9 | tigervnc-server-module | 1.13.1-3.el9_3.6.alma.1 |
Vulnerabilities 4
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Critical 9.8
Xorg-x11-server: heap buffer overflow in devicefocusevent and procxiquerypointer
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'…
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High 7.8
Xorg-x11-server: reattaching to different master device may lead to out-of-bounds memory access
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 serv…
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High 7.8
Xorg-x11-server: heap buffer overflow in xisenddevicehierarchyevent
A flaw was found in X.Org server. In the XISendDeviceHierarchyEvent function, it is possible to exceed the allocated array length when certain new device IDs are added to the xXIHierarchyInfo struct. This can trigger a heap buffer overflow condition, which ma…
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High 7.8
Xorg-x11-server: heap buffer overflow in disabledevice
A heap buffer overflow flaw was found in the DisableDevice function in the X.Org server. This issue may lead to an application crash or, in some circumstances, remote code execution in SSH X11 forwarding environments.
References
-
report
https://access.redhat.com/security/cve/CVE-2023-6816
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report
https://access.redhat.com/security/cve/CVE-2024-0229
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report
https://access.redhat.com/security/cve/CVE-2024-21885
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report
https://access.redhat.com/security/cve/CVE-2024-21886
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report
https://bugzilla.redhat.com/2256540
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report
https://bugzilla.redhat.com/2256542
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report
https://bugzilla.redhat.com/2256690
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report
https://bugzilla.redhat.com/2257691
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advisory
https://errata.almalinux.org/9/ALSA-2024-0557.html