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.
922 B
NOTICE — cls_route4 (CVE-2022-2588)
Vulnerability
CVE-2022-2588 — net/sched cls_route4 handle-zero dangling-filter
UAF → kernel R/W via msg_msg cross-cache refill.
Research credit
Discovered and disclosed by kylebot / xkernel, August 2022.
Public PoC + writeup: https://www.willsroot.io/2022/08/lpe-on-mountpoint.html (William Liu's analysis built on kylebot's trigger).
Upstream fix: mainline 5.20 / stable 5.19.7 (Aug 2022). Branch backports: 5.4.213 / 5.10.143 / 5.15.69 / 5.18.18 / 5.19.7.
IAMROOT role
The module uses unshare(USER|NET), brings up a dummy interface,
creates an htb qdisc + class, adds a route4 filter, then deletes
it to leave the dangling pointer. msg_msg sprays kmalloc-1k while
a UDP classify() walk follows the dangling pointer. --full-chain
re-fires with a faked tcf_proto.ops pointer aimed at the
modprobe_path overwrite via the shared finisher.