Status/2025Q3/mac_do.adoc: Add report #552
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Signed-off-by: thesynthax <[email protected]>
lsalvadore
approved these changes
Oct 10, 2025
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| [[gsoc25-macdo-mdo]] | |||
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We usually do not put labels at the beginning of reports. Please remove it unless you have some special need.
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| [[gsoc25-macdo-mdo]] |
| === mac_do(4) and mdo(1) Improvements | ||
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| Links: + | ||
| https://wiki.freebsd.org/SummerOfCode2025Projects/MacDoAndMDoImprovements |
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We have a different format for the links section. We need to explicitly use the link: prefix and to repeat it twice for technical reasons.
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| https://wiki.freebsd.org/SummerOfCode2025Projects/MacDoAndMDoImprovements | |
| link:https://wiki.freebsd.org/SummerOfCode2025Projects/MacDoAndMDoImprovements[Wiki page] URL: link:https://wiki.freebsd.org/SummerOfCode2025Projects/MacDoAndMDoImprovements[] |
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| Contact: Kushagra Srivastava <[email protected]> | ||
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| As part of Google Summer of Code 2025, I worked on two related sub-projects in the FreeBSD Project: kernel improvements to `mac_do(4)` and userland enhancements to `mdo(1)`. |
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We have a specific macro for man pages.
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| As part of Google Summer of Code 2025, I worked on two related sub-projects in the FreeBSD Project: kernel improvements to `mac_do(4)` and userland enhancements to `mdo(1)`. | |
| As part of Google Summer of Code 2025, I worked on two related sub-projects in the FreeBSD Project: kernel improvements to man:mac_do[4] and userland enhancements to man:mdo[1]. |
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| As part of Google Summer of Code 2025, I worked on two related sub-projects in the FreeBSD Project: kernel improvements to `mac_do(4)` and userland enhancements to `mdo(1)`. | ||
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| `mac_do(4)` is a kernel MAC security module that allows controlled credential transitions without requiring setuid binaries. The project extended it in two key ways: |
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We do not need to refer to the man page each single time.
We need to put one sentence per line.
Suggested change
| `mac_do(4)` is a kernel MAC security module that allows controlled credential transitions without requiring setuid binaries. The project extended it in two key ways: | |
| mac_do is a kernel MAC security module that allows controlled credential transitions without requiring setuid binaries. | |
| The project extended it in two key ways: |
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| `mac_do(4)` is a kernel MAC security module that allows controlled credential transitions without requiring setuid binaries. The project extended it in two key ways: | ||
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| * **Per-jail configuration of authorized executables** – administrators can now specify a list of executables per-jail, permitted to request credential transitions, instead of being limited to the hardcoded `/usr/bin/mdo`. |
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We have a special syntax for filenames too.
Suggested change
| * **Per-jail configuration of authorized executables** – administrators can now specify a list of executables per-jail, permitted to request credential transitions, instead of being limited to the hardcoded `/usr/bin/mdo`. | |
| * **Per-jail configuration of authorized executables** – administrators can now specify a list of executables per-jail, permitted to request credential transitions, instead of being limited to the hardcoded [.filename]#/usr/bin/mdo#. |
| `mac_do(4)` is a kernel MAC security module that allows controlled credential transitions without requiring setuid binaries. The project extended it in two key ways: | ||
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| * **Per-jail configuration of authorized executables** – administrators can now specify a list of executables per-jail, permitted to request credential transitions, instead of being limited to the hardcoded `/usr/bin/mdo`. | ||
| * **Support for traditional credential-changing syscalls** – transitions requested via `setuid(2)`, `setgid(2)`, `setgroups(2)`, and related functions are now intercepted and authorized through `mac_do(4)`, in addition to the original `setcred(2)` mechanism. |
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Suggested change
| * **Support for traditional credential-changing syscalls** – transitions requested via `setuid(2)`, `setgid(2)`, `setgroups(2)`, and related functions are now intercepted and authorized through `mac_do(4)`, in addition to the original `setcred(2)` mechanism. | |
| * **Support for traditional credential-changing syscalls** – transitions requested via man:setuid[2], man:setgid[2], man:setgroups[2], and related functions are now intercepted and authorized through mac_do, in addition to the original man:setcred[2] mechanism. |
| * **Per-jail configuration of authorized executables** – administrators can now specify a list of executables per-jail, permitted to request credential transitions, instead of being limited to the hardcoded `/usr/bin/mdo`. | ||
| * **Support for traditional credential-changing syscalls** – transitions requested via `setuid(2)`, `setgid(2)`, `setgroups(2)`, and related functions are now intercepted and authorized through `mac_do(4)`, in addition to the original `setcred(2)` mechanism. | ||
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| On the userland side, the companion tool `mdo(1)` was extended to: |
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| On the userland side, the companion tool `mdo(1)` was extended to: | |
| On the userland side, the companion tool mdo was extended to: |
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| * Provide a `--print-rule` option to display the corresponding `mac_do(4)` rule for a requested transition. | ||
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| Together, these improvements make `mac_do(4)` and `mdo(1)` far more flexible and practical, enabling safer privilege transitions without relying on setuid executables and with strong jail integration. |
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Suggested change
| * Provide a `--print-rule` option to display the corresponding `mac_do(4)` rule for a requested transition. | |
| Together, these improvements make `mac_do(4)` and `mdo(1)` far more flexible and practical, enabling safer privilege transitions without relying on setuid executables and with strong jail integration. | |
| * Provide a `--print-rule` option to display the corresponding mac_do rule for a requested transition. | |
| Together, these improvements make mac_do and mdo far more flexible and practical, enabling safer privilege transitions without relying on setuid executables and with strong jail integration. |
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Sure! Thanks a lot! |
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Merged, thanks! |
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