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These mitigations are low-overhead, upstream-supported hardening options that only activate on CPUs affected by their respective vulnerabilities. Enabling them provides consistent, defense-in-depth coverage across Intel and AMD systems without impacting unaffected hardware. Detailed list: - CONFIG_MITIGATION_SRSO to guard against known a vulnerability found on AMD processors (Zen generations 1-4) for sure, maybe others. This is tracked under CVE-2023-20569. - CONFIG_MITIGATION_ITS to guard against a bug in BPU on some Intel CPUs that may allow Spectre V2 style attacks. We never enabled this option (and its dependencies). - CONFIG_MITIGATION_SRBDS to guard against Special Register Buffer Data Sampling on affected Intel CPUs (CVE-2020-0543), preventing cross-core leakage of RDRAND/RDSEED/EGETKEY values. - CONFIG_MITIGATION_SLS to guard against Spectre-v4 gadgets on x86 by inserting speculation barriers around RET/JMP/CALL sites when required by CPU/microcode state. - CONFIG_MITIGATION_CALL_DEPTH_TRACKING to guard against speculative call-stack underflow on x86 by enabling hardware-assisted depth tracking where supported, reducing exposure to RET-based misprediction attacks. - CONFIG_MITIGATION_UNRET_ENTRY to guard against RET-based speculation attacks on x86 by replacing vulnerable function returns in kernel entry paths with UNRET sequences when required by CPU/microcode state. Signed-off-by: John Audia <therealgraysky@proton.me> Link: https://github.com/openwrt/openwrt/pull/21078 Signed-off-by: Robert Marko <robimarko@gmail.com> |
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| target | ||
| toolchain | ||
| tools | ||
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| rules.mk | ||
OpenWrt Project is a Linux operating system targeting embedded devices. Instead of trying to create a single, static firmware, OpenWrt provides a fully writable filesystem with package management. This frees you from the application selection and configuration provided by the vendor and allows you to customize the device through the use of packages to suit any application. For developers, OpenWrt is the framework to build an application without having to build a complete firmware around it; for users this means the ability for full customization, to use the device in ways never envisioned.
Sunshine!
Download
Built firmware images are available for many architectures and come with a package selection to be used as WiFi home router. To quickly find a factory image usable to migrate from a vendor stock firmware to OpenWrt, try the Firmware Selector.
If your device is supported, please follow the Info link to see install instructions or consult the support resources listed below.
An advanced user may require additional or specific package. (Toolchain, SDK, ...) For everything else than simple firmware download, try the wiki download page:
Development
To build your own firmware you need a GNU/Linux, BSD or macOS system (case sensitive filesystem required). Cygwin is unsupported because of the lack of a case sensitive file system.
Requirements
You need the following tools to compile OpenWrt, the package names vary between distributions. A complete list with distribution specific packages is found in the Build System Setup documentation.
binutils bzip2 diff find flex gawk gcc-6+ getopt grep install libc-dev libz-dev
make4.1+ perl python3.7+ rsync subversion unzip which
Quickstart
-
Run
./scripts/feeds update -ato obtain all the latest package definitions defined in feeds.conf / feeds.conf.default -
Run
./scripts/feeds install -ato install symlinks for all obtained packages into package/feeds/ -
Run
make menuconfigto select your preferred configuration for the toolchain, target system & firmware packages. -
Run
maketo build your firmware. This will download all sources, build the cross-compile toolchain and then cross-compile the GNU/Linux kernel & all chosen applications for your target system.
Related Repositories
The main repository uses multiple sub-repositories to manage packages of
different categories. All packages are installed via the OpenWrt package
manager called opkg. If you're looking to develop the web interface or port
packages to OpenWrt, please find the fitting repository below.
-
LuCI Web Interface: Modern and modular interface to control the device via a web browser.
-
OpenWrt Packages: Community repository of ported packages.
-
OpenWrt Routing: Packages specifically focused on (mesh) routing.
-
OpenWrt Video: Packages specifically focused on display servers and clients (Xorg and Wayland).
Support Information
For a list of supported devices see the OpenWrt Hardware Database
Documentation
Support Community
- Forum: For usage, projects, discussions and hardware advise.
- Support Chat: Channel
#openwrton oftc.net.
Developer Community
- Bug Reports: Report bugs in OpenWrt
- Dev Mailing List: Send patches
- Dev Chat: Channel
#openwrt-develon oftc.net.
License
OpenWrt is licensed under GPL-2.0