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.
33 lines
1014 B
C
33 lines
1014 B
C
/*
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* IAMROOT — module registry
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*
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* Global list of registered modules. Each family contributes via
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* register_<family>_modules() called from iamroot main() at startup.
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*/
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#ifndef IAMROOT_REGISTRY_H
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#define IAMROOT_REGISTRY_H
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#include "module.h"
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void iamroot_register(const struct iamroot_module *m);
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size_t iamroot_module_count(void);
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const struct iamroot_module *iamroot_module_at(size_t i);
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/* Find a module by name. Returns NULL if not found. */
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const struct iamroot_module *iamroot_module_find(const char *name);
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/* Each module family declares one of these in its public header. The
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* top-level iamroot main() calls them in order at startup. */
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void iamroot_register_copy_fail_family(void);
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void iamroot_register_dirty_pipe(void);
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void iamroot_register_entrybleed(void);
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void iamroot_register_pwnkit(void);
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void iamroot_register_nf_tables(void);
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void iamroot_register_overlayfs(void);
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void iamroot_register_cls_route4(void);
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void iamroot_register_dirty_cow(void);
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#endif /* IAMROOT_REGISTRY_H */
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