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To quote from the kernel documentation: > Historically the kernel has allowed TIOCSTI, which will push > characters into a controlling TTY. This continues to be used > as a malicious privilege escalation mechanism, and provides no > meaningful real-world utility any more. Its use is considered > a dangerous legacy operation, and can be disabled on most > systems. > > Say Y here only if you have confirmed that your system's > userspace depends on this functionality to continue operating > normally. > > Processes which run with CAP_SYS_ADMIN, such as BRLTTY, can > use TIOCSTI even when this is set to N. > > This functionality can be changed at runtime with the > dev.tty.legacy_tiocsti sysctl. This configuration option sets > the default value of the sysctl. This patch therefore proposes to no longer allow legacy TIOCSTI usage in IPFire, given its security implications and the apparent lack of legitimate usage. Signed-off-by: Peter Müller <peter.mueller@ipfire.org> Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
IPFire 2.x - The Open Source Firewall
What is IPFire?
IPFire is a hardened, versatile, state-of-the-art Open Source firewall based on Linux. Its ease of use, high performance in any scenario and extensibility make it usable for everyone. For a full list of features have a look here.
This repository contains the source code of IPFire 2.x which is used to build the whole distribution from scratch, since IPFire is not based on any other distribution.
Where can I get IPFire?
Just head over to https://www.ipfire.org/download
How do I use this software?
We have a long and detailed wiki located here which should answers most of your questions.
But I have some questions left. Where can I get support?
You can ask your question at our community located here. A complete list of our support channels can be found here.
How can I contribute?
We have another document for this. Please look here.