leviathan
9593d90385
rename: IAMROOT → SKELETONKEY across the entire project
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Breaking change. Tool name, binary name, function/type names,
constant names, env vars, header guards, file paths, and GitHub
repo URL all rebrand IAMROOT → SKELETONKEY.
Changes:
- All "IAMROOT" → "SKELETONKEY" (constants, env vars, enum
values, docs, comments)
- All "iamroot" → "skeletonkey" (functions, types, paths, CLI)
- iamroot.c → skeletonkey.c
- modules/*/iamroot_modules.{c,h} → modules/*/skeletonkey_modules.{c,h}
- tools/iamroot-fleet-scan.sh → tools/skeletonkey-fleet-scan.sh
- Binary "iamroot" → "skeletonkey"
- GitHub URL KaraZajac/IAMROOT → KaraZajac/SKELETONKEY
- .gitignore now expects build output named "skeletonkey"
- /tmp/iamroot-* tmpfiles → /tmp/skeletonkey-*
- Env vars IAMROOT_MODPROBE_PATH etc. → SKELETONKEY_*
New ASCII skeleton-key banner (horizontal key icon + ANSI Shadow
SKELETONKEY block letters) replaces the IAMROOT banner in
skeletonkey.c and README.md.
VERSION: 0.3.1 → 0.4.0 (breaking).
Build clean on Debian 6.12.86. `skeletonkey --version` → 0.4.0.
All 24 modules still register; no functional code changes — pure
rename + banner refresh.
2026-05-16 22:43:49 -04:00
leviathan
9d88b475c1
v0.3.1: --dump-offsets tool + NOTICE.md per module
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The README has been claiming "each module credits the original CVE
reporter and PoC author in its NOTICE.md" since v0.1.0, but only
copy_fail_family actually shipped one. Fixed.
modules/<name>/NOTICE.md (×19 new + 1 existing): per-module
research credit covering CVE ID, discoverer, original advisory
URL where public, upstream fix commit, IAMROOT's role.
iamroot.c: new --dump-offsets subcommand. Resolves kernel offsets
via the existing core/offsets.c four-source chain (env →
/proc/kallsyms → /boot/System.map → embedded table), then emits
a ready-to-paste C struct entry for kernel_table[]. Run once
as root on a target kernel build; upstream via PR. Eliminates
fabricating offsets — every shipped entry traces back to a
`iamroot --dump-offsets` invocation on a real kernel.
docs/OFFSETS.md: documents the --dump-offsets workflow.
CVES.md: notes the NOTICE.md convention + offset dump tool.
iamroot.c: bump IAMROOT_VERSION 0.3.0 → 0.3.1.
2026-05-16 22:33:43 -04:00
leviathan
4e9741ef1f
Add overlayfs_setuid CVE-2023-0386 — FULL working exploit
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Distro-agnostic overlayfs LPE — complements Ubuntu-specific CVE-2021-3493.
Same overlayfs family.
The bug: overlayfs copy_up preserves setuid bits even when the
unprivileged user triggering copy-up wouldn't normally have CAP_FSETID.
Exploit:
1. unshare(USER|NS), uid_map self → root in userns
2. Find a setuid binary on host (/usr/bin/su, sudo, passwd auto-pick)
3. mount overlayfs with the binary's dirname as lower
4. chown(merged/<binary>, 0, 0) — triggers copy-up; THE BUG: setuid
bit persists in upper-layer copy despite our unprivileged context
5. Open + truncate + replace upper-layer content with our payload
(a compiled C binary that setresuid(0,0,0) + execle /bin/sh -p)
6. exec upper-layer binary — runs as root via persistent setuid bit
- kernel_range: 5.11 ≤ K < 6.3, backports 5.15.110 / 6.1.27 / 6.2.13
- Detect refuses on patched / missing setuid carrier / userns denied
- Cleanup: rm -rf /tmp/iamroot-ovlsu-*
- Auditd: mount(overlay) + chown/fchown chain — shared with
CVE-2021-3493 module via the family-level 'iamroot-overlayfs' key
- Compiles payload via target's gcc/cc (fallback dynamic if no -static)
Verified on Debian 6.12.86 (patched): detect reports OK; exploit
refuses cleanly. Module count = 20.
Coverage by year now (only 2018 gap remaining):
2016: dirty_cow 🟢
2017: af_packet 🔵
2019: ptrace_traceme 🟢
2020: af_packet2 🔵
2021: pwnkit, overlayfs, netfilter_xtcompat 🟢 /🟢 /🔵
2022: dirty_pipe, cls_route4, fuse_legacy,
cgroup_release_agent 🟢 /🔵 /🔵 /🟢
2023: entrybleed, stackrot, overlayfs_setuid 🟢 /🔵 /🟢
2024: nf_tables 🔵
2026: copy_fail family (×5) 🟢 🟢 🟢 🟢 🟢
16 of 20 modules have FULL working exploits (🟢 ).
2026-05-16 21:11:37 -04:00
leviathan