leviathan
cb39cc5119
The iconic 2016 LPE. Fills the 10-year coverage gap (now spanning
2016 → 2026): RHEL 6/7, Ubuntu 14.04, Ubuntu 16.04, embedded boxes,
IoT — many still in production with kernels predating the 4.9 fix.
- modules/dirty_cow_cve_2016_5195/iamroot_modules.{c,h}:
- kernel_range: backport thresholds for 2.6 / 3.2 / 3.10 / 3.12 /
3.16 / 3.18 / 4.4 / 4.7 / 4.8 / mainline 4.9
- dirty_cow_write(): Phil-Oester-style two-thread race
- mmap /etc/passwd MAP_PRIVATE (writes go COW)
- writer thread: pwrite to /proc/self/mem at COW page offset
- madviser thread: madvise(MADV_DONTNEED) to drop COW copy
- poll-read /etc/passwd via separate fd to check if payload landed
- 3-second timeout (race usually wins in ms on vulnerable kernels)
- dirty_cow_exploit(): getpwuid → find_passwd_uid_field → race
→ execlp(su)
- dirty_cow_cleanup(): POSIX_FADV_DONTNEED + drop_caches
- Auditd rule: /proc/self/mem writes + madvise MADV_DONTNEED
- Sigma rule: non-root /proc/self/mem open → high
- Makefile: -lpthread added to LDFLAGS for the binary link.
- iamroot.c + core/registry.h wired.
- CVES.md row added with detailed status; legend updated.
Verified end-to-end on kctf-mgr (6.12.86 — patched):
iamroot --scan → 'dirty_cow: kernel is patched' (OK)
iamroot --exploit dirty_cow --i-know
→ 'detect() says not vulnerable; refusing'
Module count = 12.
104 lines
3.5 KiB
Makefile
104 lines
3.5 KiB
Makefile
# IAMROOT — top-level Makefile (Phase 1)
|
|
#
|
|
# Builds one binary `iamroot` linked from:
|
|
# - core/ module interface + registry
|
|
# - modules/<f>/ one family per subdir, contributes objects to the
|
|
# final binary
|
|
# - iamroot.c top-level dispatcher
|
|
#
|
|
# Each family is currently flat (Phase 1 keeps copy_fail_family's
|
|
# absorbed DIRTYFAIL source in modules/copy_fail_family/src/).
|
|
# Future families register the same way: add their register_* call to
|
|
# iamroot.c's main() and add their src dir to MODULE_DIRS below.
|
|
|
|
CC ?= gcc
|
|
CFLAGS ?= -O2 -Wall -Wextra -Wno-unused-parameter -Wno-pointer-arith \
|
|
-D_GNU_SOURCE -D_FILE_OFFSET_BITS=64
|
|
LDFLAGS ?=
|
|
|
|
BUILD := build
|
|
BIN := iamroot
|
|
|
|
# core/
|
|
CORE_SRCS := core/registry.c core/kernel_range.c
|
|
CORE_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(CORE_SRCS))
|
|
|
|
# Family: copy_fail_family
|
|
# All DIRTYFAIL .c files contribute; iamroot_modules.c is the bridge.
|
|
CFF_DIR := modules/copy_fail_family
|
|
CFF_SRCS := $(wildcard $(CFF_DIR)/src/*.c) $(CFF_DIR)/iamroot_modules.c
|
|
# Filter out the original dirtyfail.c (its main() conflicts with iamroot.c's main).
|
|
CFF_SRCS := $(filter-out $(CFF_DIR)/src/dirtyfail.c, $(CFF_SRCS))
|
|
CFF_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(CFF_SRCS))
|
|
|
|
# Family: dirty_pipe (single-CVE family, no shared infrastructure)
|
|
DP_DIR := modules/dirty_pipe_cve_2022_0847
|
|
DP_SRCS := $(DP_DIR)/iamroot_modules.c
|
|
DP_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(DP_SRCS))
|
|
|
|
# Family: entrybleed (single-CVE family, x86_64 only)
|
|
EB_DIR := modules/entrybleed_cve_2023_0458
|
|
EB_SRCS := $(EB_DIR)/iamroot_modules.c
|
|
EB_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(EB_SRCS))
|
|
|
|
# Family: pwnkit (userspace polkit bug, not kernel)
|
|
PK_DIR := modules/pwnkit_cve_2021_4034
|
|
PK_SRCS := $(PK_DIR)/iamroot_modules.c
|
|
PK_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(PK_SRCS))
|
|
|
|
# Family: nf_tables (CVE-2024-1086)
|
|
NFT_DIR := modules/nf_tables_cve_2024_1086
|
|
NFT_SRCS := $(NFT_DIR)/iamroot_modules.c
|
|
NFT_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(NFT_SRCS))
|
|
|
|
# Family: overlayfs (CVE-2021-3493)
|
|
OVL_DIR := modules/overlayfs_cve_2021_3493
|
|
OVL_SRCS := $(OVL_DIR)/iamroot_modules.c
|
|
OVL_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(OVL_SRCS))
|
|
|
|
# Family: cls_route4 (CVE-2022-2588)
|
|
CR4_DIR := modules/cls_route4_cve_2022_2588
|
|
CR4_SRCS := $(CR4_DIR)/iamroot_modules.c
|
|
CR4_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(CR4_SRCS))
|
|
|
|
# Family: dirty_cow (CVE-2016-5195) — requires -pthread
|
|
DCOW_DIR := modules/dirty_cow_cve_2016_5195
|
|
DCOW_SRCS := $(DCOW_DIR)/iamroot_modules.c
|
|
DCOW_OBJS := $(patsubst %.c,$(BUILD)/%.o,$(DCOW_SRCS))
|
|
|
|
# Top-level dispatcher
|
|
TOP_OBJ := $(BUILD)/iamroot.o
|
|
|
|
ALL_OBJS := $(TOP_OBJ) $(CORE_OBJS) $(CFF_OBJS) $(DP_OBJS) $(EB_OBJS) $(PK_OBJS) $(NFT_OBJS) $(OVL_OBJS) $(CR4_OBJS) $(DCOW_OBJS)
|
|
|
|
.PHONY: all clean debug static help
|
|
|
|
all: $(BIN)
|
|
|
|
$(BIN): $(ALL_OBJS)
|
|
$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^ -lpthread
|
|
|
|
# Generic compile: any .c → corresponding .o under build/
|
|
$(BUILD)/%.o: %.c
|
|
@mkdir -p $(dir $@)
|
|
$(CC) $(CFLAGS) -Icore -I$(CFF_DIR)/src -c -o $@ $<
|
|
|
|
debug: CFLAGS := -O0 -g3 -Wall -Wextra -Wno-unused-parameter -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64
|
|
debug: clean $(BIN)
|
|
|
|
static: LDFLAGS += -static
|
|
static: clean $(BIN)
|
|
|
|
clean:
|
|
rm -rf $(BUILD) $(BIN)
|
|
|
|
help:
|
|
@echo "Targets:"
|
|
@echo " make build optimized iamroot binary"
|
|
@echo " make debug build with -O0 -g3"
|
|
@echo " make static build a fully static binary"
|
|
@echo " make clean remove build artifacts"
|
|
@echo ""
|
|
@echo "Per-module (legacy) — not built by default:"
|
|
@echo " cd modules/copy_fail_family && make"
|