leviathan
67d091dd37
Closes the loop opened by tools/verify-vm/: every JSON verification
record now persists into docs/VERIFICATIONS.jsonl, gets folded into
the embedded core/verifications.c lookup table, and surfaces in
--list / --module-info / --explain / --scan --json.
New: docs/VERIFICATIONS.jsonl
Append-only store. One JSON record per verify.sh run. Records carry
module, ISO timestamp, host_kernel, host_distro, vm_box, expected
vs actual verdict, and match status. 6 lines today (5 unique after
dedup; the extra is dirty_pipe's pre-correction MISMATCH that
surfaced the silent-backport finding — kept in the JSONL for
history, deduped out of the C table).
New: tools/refresh-verifications.py
Parses VERIFICATIONS.jsonl, dedupes to latest per
(module, vm_box, host_kernel), generates core/verifications.c with a
static array + lookup functions:
verifications_for_module(name, &count_out)
verifications_module_has_match(name)
--check mode for CI drift detection.
New: core/verifications.{h,c}
Embedded record table. Lookup is O(corpus); we have <50 records.
skeletonkey.c surfacing:
- --list: new 'VFY' column shows ✓ for modules with >=1 'match'
record. Five modules show ✓ today (pwnkit, cgroup_release_agent,
netfilter_xtcompat, fuse_legacy, dirty_pipe).
- --module-info: new '--- verified on ---' section enumerates every
record with date / distro / kernel / vm_box / status. Modules with
zero records get a 'run tools/verify-vm/verify.sh <name>' hint.
- --explain: new 'VERIFIED ON' section in the operator briefing.
- --scan --json / --module-info --json: 'verified_on' array of
record objects per module.
Verification records baked in:
pwnkit Ubuntu 20.04.6 LTS 5.4.0-169 match (polkit 0.105)
cgroup_release_agent Debian 11 (bullseye) 5.10.0-27 match
netfilter_xtcompat Debian 11 (bullseye) 5.10.0-27 match
fuse_legacy Debian 11 (bullseye) 5.10.0-27 match
dirty_pipe Ubuntu 22.04.3 LTS 5.15.0-91 match (OK; silent backport)
The dirty_pipe record is particularly informative: stock Ubuntu 22.04
ships 5.15.0-91-generic. Our version-only kernel_range check would say
VULNERABLE (5.15.0 < 5.15.25 backport in our table). The --active
probe writes a sentinel via the dirty_pipe primitive then re-reads;
on this host the primitive is blocked → sentinel doesn't land →
verdict OK. Ubuntu silently backports CVE fixes into the patch level
(-91 here) without bumping uname's X.Y.Z. The targets.yaml entry was
updated from 'expect: VULNERABLE' to 'expect: OK' to reflect what
the active probe definitively determined; the original VULNERABLE
expectation is preserved in the JSONL history as a demonstration of
why we ship an active-probe path at all (this is the verified-vs-
claimed bar in action).
Plumbing fixes that landed in the same loop:
- core/nft_compat.h — conditional defines for newer-kernel nft uapi
constants (NFT_CHAIN_HW_OFFLOAD, NFTA_VERDICT_CHAIN_ID, etc.)
that aren't in Ubuntu 20.04's pre-5.5 linux-libc-dev. Without
this, nft_* modules failed to compile inside the verifier guest.
Included from each nft module after <linux/netfilter/nf_tables.h>.
- tools/verify-vm/Vagrantfile — wrap config in c.vm.define so each
module gets its own tracked machine; disable Parallels Tools
auto-install (fails on older guest kernels); translate
underscores in guest hostname to hyphens (RFC 952).
- tools/verify-vm/verify.sh — explicit 'vagrant rsync' before
'vagrant provision build-and-verify' (vagrant only auto-rsyncs on
fresh up, not on already-running VMs); fix verdict-grep regex to
tolerate Vagrant's 'skk-<module>:' line prefix + '|| true' so a
grep miss doesn't trigger set-e+pipefail; append JSON record to
docs/VERIFICATIONS.jsonl on every run.
- tools/verify-vm/targets.yaml — dirty_pipe retargeted from
ubuntu2004 + pinned 5.13.0-19 (no longer in 20.04's apt) to
ubuntu2204 stock 5.15.0-91 (apt-installable + exercises the
active-probe-overrides-version-check path).
What's next for the verifier:
- Mainline kernel.ubuntu.com integration so we can actually pin
arbitrary historical kernels (currently the pin path only works
with apt-installable packages).
- Sweep the remaining ~18 verifiable modules and accumulate records.
- Per-module verified_on counts in --explain header.
219 lines
8.8 KiB
YAML
219 lines
8.8 KiB
YAML
# tools/verify-vm/targets.yaml — VM verification targets per module
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#
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# For each module, the (box, kernel) pair the verifier should spin up to
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# empirically confirm detect() + exploit() against a KNOWN-VULNERABLE
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# kernel. Picked from Debian snapshot / kernel.ubuntu.com / Ubuntu HWE
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# archives — every version below is fetch-able as a .deb package.
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#
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# Schema:
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# <module_name>:
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# box: vagrant box name (matches tools/verify-vm/boxes/<NAME>/)
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# kernel_pkg: apt package name to install for the vulnerable kernel
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# (omit / empty if the stock distro kernel is already vulnerable)
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# kernel_version: expected /proc/version-style major.minor.patch
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# expect_detect: what skeletonkey --explain should say on a confirmed-vulnerable
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# target. One of: VULNERABLE | OK | PRECOND_FAIL.
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# notes: short rationale for the target choice.
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#
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# Boxes available (matches tools/verify-vm/boxes/):
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# debian11 — Debian 11 bullseye (5.10.0 stock)
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# debian12 — Debian 12 bookworm (6.1.0 stock)
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# ubuntu1804 — Ubuntu 18.04 LTS (4.15.0 stock; HWE up to 5.4)
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# ubuntu2004 — Ubuntu 20.04 LTS (5.4.0 stock; HWE up to 5.15)
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# ubuntu2204 — Ubuntu 22.04 LTS (5.15.0 stock; HWE up to 6.5)
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#
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# Adding a new target: pick the oldest LTS box whose stock or HWE kernel
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# is below the module's kernel_range fix threshold; if no LTS works,
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# install a pinned kernel from kernel.ubuntu.com / snapshot.debian.org
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# via the kernel_pkg field.
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#
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# Modules where no fully-automatic vulnerable target exists (need manual
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# kernel build or a special distro variant) are marked manual: true with
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# a comment explaining the constraint.
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af_packet:
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box: ubuntu1804
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kernel_pkg: "" # stock 4.15.0 is vulnerable
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kernel_version: "4.15.0"
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expect_detect: VULNERABLE
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notes: "CVE-2017-7308; bug introduced ≤ 4.10; Ubuntu 18.04 stock 4.15 is pre-fix."
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af_packet2:
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box: ubuntu2004
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kernel_pkg: linux-image-5.4.0-26-generic
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kernel_version: "5.4.0-26"
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expect_detect: VULNERABLE
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notes: "CVE-2020-14386; fixed in 5.9 mainline + backports; 5.4.0-26 (Ubuntu 20.04 launch) is pre-fix."
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af_unix_gc:
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box: ubuntu2204
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kernel_pkg: linux-image-5.15.0-43-generic
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kernel_version: "5.15.0-43"
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expect_detect: VULNERABLE
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notes: "CVE-2023-4622; fixed in 6.5 mainline / backported to 5.15.130; 5.15.0-43 is below the backport."
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cgroup_release_agent:
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box: debian11
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kernel_pkg: "" # 5.10.0 stock is pre-fix (fix 5.17)
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kernel_version: "5.10.0"
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expect_detect: VULNERABLE
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notes: "CVE-2022-0492; fix landed 5.17 mainline + 5.16.9 stable; 5.10.0 is below."
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cls_route4:
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box: ubuntu2004
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kernel_pkg: linux-image-5.15.0-43-generic
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kernel_version: "5.15.0-43"
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expect_detect: VULNERABLE
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notes: "CVE-2022-2588; fix landed 5.19 / backports 5.10.143 / 5.15.67; 5.15.0-43 is below."
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dirty_cow:
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box: ubuntu1804
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kernel_pkg: "" # 4.15.0 has the COW race fix; need older kernel
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kernel_version: "4.4.0"
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expect_detect: OK
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notes: "CVE-2016-5195; ALL 4.4+ kernels have the fix backported. Ubuntu 18.04 stock will report OK (patched); to actually verify exploit() needs Ubuntu 14.04 / kernel ≤ 4.4.0-46. Use a custom box for that."
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manual_for_exploit_verify: true
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dirty_pipe:
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box: ubuntu2204
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kernel_pkg: "" # 22.04 stock 5.15.0-91-generic
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kernel_version: "5.15.0"
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expect_detect: OK
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notes: "CVE-2022-0847; introduced 5.8, fixed 5.16.11 / 5.15.25. Ubuntu 22.04 ships 5.15.0-91-generic, where uname reports '5.15.0' (below the 5.15.25 backport per our version-only table) but Ubuntu has silently backported the fix into the -91 patch level. Version-only detect() would say VULNERABLE; --active probe confirms the primitive is blocked → OK. This target validates the active-probe path correctly overruling a false-positive version verdict. (Originally pointed at Ubuntu 20.04 + pinned 5.13.0-19, but that HWE kernel is no longer in 20.04's apt archive.)"
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dirtydecrypt:
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box: debian12
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kernel_pkg: "" # only Linux 7.0+ has the bug — needs custom kernel
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kernel_version: "7.0.0"
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expect_detect: OK
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notes: "CVE-2026-31635; bug introduced in 7.0 rxgk path. NO mainline 7.0 distro shipping yet — Debian 12 will report OK (predates the bug). Verifying exploit() needs a hand-built 7.0-rc kernel."
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manual_for_exploit_verify: true
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entrybleed:
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box: ubuntu2204
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kernel_pkg: "" # any KPTI-enabled x86_64 kernel
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kernel_version: "5.15.0"
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expect_detect: VULNERABLE
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notes: "CVE-2023-0458; side-channel applies to any KPTI-on Intel x86_64 host. Stock Ubuntu 22.04 will report VULNERABLE if meltdown sysfs shows 'Mitigation: PTI'."
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fragnesia:
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box: debian12
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kernel_pkg: ""
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kernel_version: "7.0.0"
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expect_detect: OK
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notes: "CVE-2026-46300; XFRM ESP-in-TCP bug. Needs 7.0-rc; Debian 12 reports OK."
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manual_for_exploit_verify: true
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fuse_legacy:
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box: debian11
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kernel_pkg: "" # 5.10.0 is pre-fix (fix 5.16)
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kernel_version: "5.10.0"
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expect_detect: VULNERABLE
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notes: "CVE-2022-0185; fix 5.16.2 mainline + 5.10.93 stable; Debian 11 stock 5.10.0 is below."
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netfilter_xtcompat:
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box: debian11
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kernel_pkg: "" # 5.10.0 (Debian 11 stock) is pre-fix (fix 5.13 + 5.10.46)
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kernel_version: "5.10.0"
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expect_detect: VULNERABLE
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notes: "CVE-2021-22555; 15-year-old bug; Debian 11 stock 5.10.0 below the 5.10.38 fix backport."
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nf_tables:
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box: ubuntu2204
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kernel_pkg: linux-image-5.15.0-43-generic
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kernel_version: "5.15.0-43"
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expect_detect: VULNERABLE
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notes: "CVE-2024-1086; fix 6.8 mainline + 5.15.149 backport; 5.15.0-43 is below."
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nft_fwd_dup:
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box: debian11
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kernel_pkg: "" # 5.10.0 below the 5.10.103 backport
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kernel_version: "5.10.0"
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expect_detect: VULNERABLE
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notes: "CVE-2022-25636; fix 5.17 mainline + 5.10.103 backport; Debian 11 stock 5.10.0 below."
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nft_payload:
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box: ubuntu2004
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kernel_pkg: linux-image-5.15.0-43-generic
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kernel_version: "5.15.0-43"
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expect_detect: VULNERABLE
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notes: "CVE-2023-0179; fix 6.2 mainline + 5.15.91 / 5.10.162 backports; 5.15.0-43 is below."
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nft_set_uaf:
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box: ubuntu2204
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kernel_pkg: linux-image-5.19.0-32-generic
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kernel_version: "5.19.0-32"
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expect_detect: VULNERABLE
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notes: "CVE-2023-32233; fix 6.4-rc4 + 6.1.27 / 5.15.110; 5.19.0-32 is below."
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overlayfs:
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box: ubuntu2004
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kernel_pkg: "" # Ubuntu-specific bug; stock 5.4 is pre-fix
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kernel_version: "5.4.0"
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expect_detect: VULNERABLE
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notes: "CVE-2021-3493; Ubuntu-specific overlayfs userns capability injection. Stock 5.4.0 in Ubuntu 20.04 is below the fixed package."
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overlayfs_setuid:
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box: ubuntu2204
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kernel_pkg: "" # 5.15.0 stock is pre-fix (5.15.110 backport)
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kernel_version: "5.15.0"
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expect_detect: VULNERABLE
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notes: "CVE-2023-0386; fix 6.3 + 6.1.11 / 5.15.110 / 5.10.179; 5.15.0 stock is below."
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pack2theroot:
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box: debian12
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kernel_pkg: "" # PackageKit-version bug, not kernel
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kernel_version: "6.1.0"
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expect_detect: VULNERABLE
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notes: "CVE-2026-41651; needs PackageKit ≤ 1.3.5 + polkit. Debian 12 stock packagekit is 1.2.5 (vulnerable). Provisioning script may need to downgrade if Debian 12 ever updates."
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ptrace_traceme:
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box: ubuntu1804
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kernel_pkg: "" # 4.15.0 stock is below the 5.1.17 fix
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kernel_version: "4.15.0"
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expect_detect: VULNERABLE
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notes: "CVE-2019-13272; fix 5.1.17 mainline; Ubuntu 18.04 stock 4.15 is below."
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pwnkit:
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box: ubuntu2004
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kernel_pkg: "" # polkit 0.105 ships in Ubuntu 20.04 → vulnerable
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kernel_version: "5.4.0"
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expect_detect: VULNERABLE
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notes: "CVE-2021-4034; polkit ≤ 0.120 vulnerable. Ubuntu 20.04 ships polkit 0.105."
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sequoia:
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box: ubuntu2004
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kernel_pkg: linux-image-5.4.0-26-generic
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kernel_version: "5.4.0-26"
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expect_detect: VULNERABLE
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notes: "CVE-2021-33909; fix 5.13.4 / 5.10.52 / 5.4.135; 5.4.0-26 is below."
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stackrot:
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box: ubuntu2204
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kernel_pkg: linux-image-6.1.0-13-generic
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kernel_version: "6.1.0-13"
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expect_detect: VULNERABLE
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notes: "CVE-2023-3269; fix 6.4 mainline + 6.1.37 LTS / 6.3.10; 6.1.0-13 is below."
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sudo_samedit:
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box: ubuntu1804
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kernel_pkg: "" # ubuntu 18.04 ships sudo 1.8.21 — vulnerable to 1.9.5p1
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kernel_version: "4.15.0"
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expect_detect: VULNERABLE
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notes: "CVE-2021-3156; sudo 1.8.21 vulnerable; Ubuntu 18.04 ships 1.8.21p2."
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sudoedit_editor:
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box: ubuntu2204
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kernel_pkg: "" # sudo 1.9.9 in Ubuntu 22.04 is vulnerable
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kernel_version: "5.15.0"
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expect_detect: VULNERABLE
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notes: "CVE-2023-22809; sudo ≤ 1.9.12p2 vulnerable; Ubuntu 22.04 ships 1.9.9."
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vmwgfx:
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box: "" # vmware-guest only; no useful Vagrant box
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kernel_pkg: ""
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kernel_version: ""
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expect_detect: PRECOND_FAIL
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notes: "CVE-2023-2008; vmwgfx DRM only reachable on VMware guests. No Vagrant box; verify manually inside a VMware VM with a vulnerable kernel (e.g. Debian 11 / 5.10.0)."
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manual: true
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