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.
37 lines
1.3 KiB
Markdown
37 lines
1.3 KiB
Markdown
# NOTICE — nft_payload (CVE-2023-0179)
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## Vulnerability
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**CVE-2023-0179** — `nft_payload` set/get uses `regs->verdict.code`
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as an index into `regs->data[]` without bounds-checking; combined
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with the variable-length element extension trick (NFTA_SET_DESC
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describing elements larger than the key/data slots), an attacker
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walks regs off either end → OOB R/W on adjacent kernel memory.
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## Research credit
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Discovered and disclosed by **Davide Ornaghi**, January 2023.
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Original slides + writeup:
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<https://github.com/davide-romanini/CVE-2023-0179>
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+ DEF CON 31 / SecurityFest 2023 presentations.
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Upstream fix: mainline 6.2-rc4 (commit `696e1a48b1a1`, Jan 2023).
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Branch backports: 4.14.302 / 4.19.269 / 5.4.229 / 5.10.163 /
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5.15.88 / 6.1.6.
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## SKELETONKEY role
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userns+netns. Hand-rolled nfnetlink batch: NEWTABLE → NEWCHAIN →
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NEWSET with `NFTA_SET_DESC` describing variable-length elements →
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NEWSETELEM with `NFTA_SET_ELEM_EXPRESSIONS` carrying a payload-set
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whose attacker-controlled `verdict.code` drives the OOB index.
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Dual cg-96 + 1k msg_msg spray (covers both common adjacency
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scenarios). `--full-chain` extends with kaddr-tagged refire aimed
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at modprobe_path via the shared finisher.
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Default OOB index `0x100` matches Ornaghi's PoC on a stock 5.15
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build; the sentinel post-check correctly reports failure on builds
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where regs->data adjacency differs.
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