leviathan
9593d90385
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.
1.0 KiB
NOTICE — ptrace_traceme (CVE-2019-13272)
Vulnerability
CVE-2019-13272 — PTRACE_TRACEME on a parent that subsequently
execve's a setuid binary leaves the now-elevated process traceable by
the unprivileged child → cred escalation via ptrace shellcode inject.
Research credit
Discovered by Jann Horn (Google Project Zero), June 2019.
Project Zero issue: https://bugs.chromium.org/p/project-zero/issues/detail?id=1903
Upstream fix: mainline 5.1.17 (commit 6994eefb0053, June 2019).
Branch backports: 4.4.182 / 4.9.182 / 4.14.131 / 4.19.58 / 5.0.20 / 5.1.17.
SKELETONKEY role
Full jannh-style chain: fork → child PTRACE_TRACEME → child
sleep+attach → parent execve setuid bin (pkexec/su/passwd
auto-selected) → child wins stale ptrace_link → POKETEXT x86_64
shellcode → root sh.
x86_64-only; ARM/other archs return PRECOND_FAIL cleanly. No exotic preconditions — doesn't need userns. Works on default-config systems including locked-down environments without unprivileged_userns_clone.