leviathan
9d88b475c1
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.
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NOTICE — overlayfs_setuid (CVE-2023-0386)
Vulnerability
CVE-2023-0386 — overlayfs copy_up preserves the setuid bit
across mount-namespace boundaries → host root via a setuid carrier
placed in the lower layer.
Research credit
Discovered and disclosed by Xkaneiki, January 2023.
Public PoC + writeup: https://github.com/xkaneiki/CVE-2023-0386
Upstream fix: mainline 6.2-rc6 (commit 4f11ada10d0a, Jan 2023).
Branch backports: 5.10.169 / 5.15.92 / 6.1.11.
IAMROOT role
Distro-agnostic — no per-kernel offsets, no race. Places a setuid binary in an overlay lower, mounts via fuse-overlayfs userns trick, executes from the upper layer to inherit the setuid bit + root euid.
Auditd rules cover overlayfs mounts and unexpected setuid copy-ups.