security

After seeing this thread today 14-2-release-p.97162, I decided to do a small guide about how to compile, and build a custom kernel for FreeBSD-X.Y-RELEASE. Since FreeBSD already works very well, I decided to reduce the amount of devices, and options available in the GENERIC kernel. This has the...

Hello, I recently came across Terry Lambert's Quora response discussing several security concerns in FreeBSD, particularly: 1. VNOP Operations: - Race conditions in create/rename operations - Non-atomic directory entry operations - Thread reentrant issues in UFS/FFS 2. Signal Stack Handling...

I have a completely idle desktop system running 14.1p5 which is exhibiting serious I/O and performance problems due entirely to a periodic security job. [root@vhost01 ~ (master)]# freebsd-version -kru 14.1-RELEASE-p5 14.1-RELEASE-p5 14.1-RELEASE-p5 [root@vhost01 ~ (master)]# top -m io last...

At <https://forums.freebsd.org/account/security> I could not see an obvious way to log out from all devices. So, in Firefox on FreeBSD, I: enabled multifactor authentication backed up codes changed my password logged out logged in. A simple reload of a logged-in Forums page in Firefox on...

I'm not quite sure where to ask this (networking, firewalls, network services or emulation might also work); mods please move if there's a better location. I've got a server currently running Windows-only software for my IP camera monitoring and I'd like to use it as a public facing web server...

I am in triple boot and on my two Linux distros there were updates to fix the critical vulnerability 2024-51. Does anyone know if there is work being done on that and if there will be an update for FreeBSD as well soon? (as I understand it all versions of Firefox are affected) Or did I miss...

I recently try to use a Yubikey 5 NFC (via USB) with FreeBSD. I installed the packages libfido2-1.15.0 and py311-yubikey-manager-5.2.0, which respectively provide the fido2-token and ykman tools that seem to work just fine. However, when I try to go to https://webauthn.io/ and try using my...

I'm wondering why the checksums for exactly the same package for "latest" and "quarterly" are different. For example, these two are from "latest" of "FreeBSD:14:amd64": {"name":"bhyve-firmware","origin":"sysutils/bhyve-firmware","version":"1.0_2","comment":"Collection of Firmware for...

How do I harden my sshd_config to allow only 1 user to be remotely logged in at any given time? (A non-admin/wheel and not-root user will login remotely, then upgrade (ie. "su -l admin) to admin/wheel, and then to root should be counted as the same user being logged in at any given time.) I...

So I have FreeBSD 14.0 with several real network interfaces (em0, igb0, wlan0, wlan1) and several loopback interfaces for jails. This configuration isn't final yet as I'm still experimenting. One of the real interfaces is facing the ISP, obviously, and hence it's configured by dhclient. It could...

Hi Did a random scan today with chkrootkit and rkhunter, chkrootkit gave me a warning: "Searching for Syslogk LKM rootkit... INFECTED: Possible Malicious Syslogk LKM rootkit installed" Anyone know anything about if this is normal error and can be ignored or if it can be something else? I...

Is Intel’s Total Memory Encryption (Multi-Key) feature supported in FreeBSD? And if so, how to enable it?

I have a concern about the recent news regarding the newly discovered SSH attacks, when "ChaCha20-Poly1305" or "CBC with Encrypt-then-MAC" is used. So, if we set up a server (sshd) or using it as a client (ssh) as default, would this vulnerability be relevant?

stable/12 and 12.4 31st December 2023 <https://lists.freebsd.org/archives/freebsd-announce/2023-December/000113.html> stable/13 30th April 2026 <https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=273795#c4>

I use ZFS snapshots and mirroring (both on a harddrive that is permanently connected and on harddrives that aren't always connected) as a means of keeping backups of my data. Using the snapshots, I can go back in time if I accidentally delete files or something else happened to my data on the...

With an external display connected: closing the lid does not lock lock the screen. Is there a workaround? Essentially: for locking to succeed.

Could anyone recommend any website pen testing software for FreeBSD? I have used vega scan in the past on Linux. But I don't know what tools are available for FreeBSD. I've done as much manual testing as I can think of so I'm looking for something automated. Thanks!

Hello, My new server is 13.2 and port security/zebedee does not exist, But I had it in 12.x . Does it has security problem to removed ?

Does the tpm2 driver in freebsd does have in-kernel RM similar to what is available in Linux via /dev/tpm0rm0 ? This is the preferred solution apparently in Linux instead of using the tpm2-abrmd stack. This tpm2-abrmd is dependent on dbus.

Hello all, my first post! Been using FreeBSD for a week or two now and I wanted to secure the simple things right away as is my nature. I wrote a Python script that can set and re-set: rc.conf sysctl.conf loader.conf login.conf Along with a set of mitigations that I've gathered over the...