A telnet security update has been released for Fedora 31.

SECURITY: Fedora 31 Update: telnet-0.17-78.fc31

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Fedora Update Notification
FEDORA-2020-e7b942a47a
2020-04-04 03:21:32.792326
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Name : telnet
Product : Fedora 31
Version : 0.17
Release : 78.fc31
URL :   http://web.archive.org/web/20070819111735/www.hcs.harvard.edu/~dholland/computers/old-netkit.html
Summary : The client program for the Telnet remote login protocol
Description :
Telnet is a popular protocol for logging into remote systems over the
Internet. The package provides a command line Telnet client

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Update Information:

Security fix for CVE-2020-10188
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ChangeLog:

* Fri Mar 27 2020 Michal Ruprich - 1:0.17-78
- Resolves: #1814478 - Arbitrary remote code execution in utility.c via short writes or urgent data
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References:

[ 1 ] Bug #1811673 - CVE-2020-10188 telnet-server: no bounds checks in nextitem() function allows to remotely execute arbitrary code
  https://bugzilla.redhat.com/show_bug.cgi?id=1811673
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2020-e7b942a47a' at the command
line. For more information, refer to the dnf documentation available at
  http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

All packages are signed with the Fedora Project GPG key. More details on the
GPG keys used by the Fedora Project can be found at
  https://fedoraproject.org/keys