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.
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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## IAMROOT 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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