Fedora 34: 2021-069c0c3950 Critical Fix For x11vnc Permissions Issue

What WinVNC is to Windows x11vnc is to X Window System, i.e. a server which

serves the current X Window System desktop via RFB (VNC) protocol to the user.

Based on the ideas of x0rfbserver and on LibVNCServer it has evolved into

a versatile and productive while still easy to use program.

This release fixes an insecure permissins of shared memory semgentes created by

an x11vnc server. Previously the segments were readable and writable for any

local user. Now they are accessible only to the user who executed the x11vnc

server.

* Mon Mar 1 2021 Petr Pisar - 0.9.16-6

- Fix CVE-2020-29074 (insecure permissions on a shared memory) (bug #1933603)

[ 1 ] Bug #1933602 - CVE-2020-29074 x11vnc: insecure permissions on shm

https://bugzilla.redhat.com/show_bug.cgi?id=1933602

su -c 'dnf upgrade --advisory FEDORA-2021-069c0c3950' at the command

line. For more information, refer to the dnf documentation available at

https://dnf.readthedocs.io/en/latest/command_ref.html

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