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Fedora 38: 2024-37627e432e critical: OpenSSH shell metasymbols issue

fedora
Calendar Grey January 23, 2024
Dist Fedora Esm H88
Fedora 38 improves both security and usability by disallowing shell meta-characters in user and host identifiers within OpenSSH.
Forbid shell metasymbols in username/hostname

Summary

SSH (Secure SHell) is a program for logging into and executing

commands on a remote machine. SSH is intended to replace rlogin and

rsh, and to provide secure encrypted communications between two

untrusted hosts over an insecure network. X11 connections and

arbitrary TCP/IP ports can also be forwarded over the secure channel.

OpenSSH is OpenBSD's version of the last free version of SSH, bringing

it up to date in terms of security and features.

This package includes the core files necessary for both the OpenSSH

client and server. To make this package useful, you should also

install openssh-clients, openssh-server, or both.

Update Information:

Forbid shell metasymbols in username/hostname

Topics%20covered

Topics Covered

security advisory update critical Fedora OpenSSH shell issue

Change Log

* Wed Jan 10 2024 Dmitry Belyavskiy - 9.0p1-18 - Forbid shell metasymbols in username/hostname Resolves: CVE-2023-51385 - Fix Terrapin attack Resolves: CVE-2023-48795

References

Fedora Update Notification FEDORA-2024-37627e432e 2024-01-23 01:21:28.284261 Name : openssh Product : Fedora 38 Version : 9.0p1 Release : 18.fc38 URL : https://www.openssh.org/portable.html Summary : An open source implementation of SSH protocol version 2 Description : SSH (Secure SHell) is a program for logging into and executing commands on a remote machine. SSH is intended to replace rlogin and rsh, and to provide secure encrypted communications between two untrusted hosts over an insecure network. X11 connections and arbitrary TCP/IP ports can also be forwarded over the secure channel. OpenSSH is OpenBSD's version of the last free version of SSH, bringing it up to date in terms of security and features. This package includes the core files necessary for both the OpenSSH client and server. To make this package useful, you should also install openssh-clients, openssh-server, or both.

Update Instructions

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2024-37627e432e' at the command line. For more information, refer to the dnf documentation available at https://dnf.readthedocs.io/en/latest/command_ref.html

Severity
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Name: openssh
Product: Fedora 38
Version: 9.0p1
Release: 18.fc38
URL: https://www.openssh.org/portable.html
Summary: An open source implementation of SSH protocol version 2

Topics%20covered

Topics Covered

security advisory update critical Fedora OpenSSH shell issue

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