JBJF
7949c7ce9f
- 31 C POC files, one per CVE folder: full seed construction + trigger + main(), self-contained, no app dependency. All compile clean with clang -O2 -Wall (zero warnings) on macOS arm64; each has a recorded oracle on this host. - CMGetDMVersionLevelFromRPU ABI pinned by disassembly: macOS export is (CFDataRef), the Swift POC drives the 4-arg iOS surface — this is the mechanism behind the cm.rpu death oracle on the simulator build. - Harness fixes: glyphCount guard, MachOInspector size guard, ModTools clamp, DeviceModel iPhone19,7, GPTPayload clamps, Gate patch display. - POC comments rewritten English-only (31 swift + arc.rr + 5 py). - README (en/zh): C twin column, .c anatomy section, compile/run examples, C oracle verification status. - Dead if-let binding removed from Identity summary; v2.0 build 3.
53 lines
2.0 KiB
C
53 lines
2.0 KiB
C
// aud.drc · AudioToolbox / AudioCodecs · UniDrcSelection · CVE-2026-113912
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// DRC decoder path probe
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// C twin of the Swift POC: dlopens AudioCodecs, dlsyms the DRC symbols, then drives
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// AudioConverterNew with the DRC format id.
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// Build: clang -O2 -o cve-2026-113912 CVE-2026-113912.c -framework AudioToolbox -framework CoreFoundation
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// Run: ./cve-2026-113912
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#include <stdio.h>
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#include <dlfcn.h>
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#include <AudioToolbox/AudioToolbox.h>
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static void audio_converter(uint32_t format, double rate, uint32_t channels) {
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AudioStreamBasicDescription in = {0};
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in.mSampleRate = rate;
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in.mFormatID = format;
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in.mFramesPerPacket = 1;
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in.mChannelsPerFrame = channels;
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AudioStreamBasicDescription out = {0};
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out.mSampleRate = rate;
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out.mFormatID = kAudioFormatLinearPCM;
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out.mFormatFlags = kAudioFormatFlagIsFloat | kAudioFormatFlagIsPacked;
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out.mBytesPerPacket = 4;
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out.mFramesPerPacket = 1;
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out.mBytesPerFrame = 4;
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out.mChannelsPerFrame = 1;
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out.mBitsPerChannel = 32;
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AudioConverterRef c = NULL;
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OSStatus st = AudioConverterNew(&in, &out, &c);
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if (c) AudioConverterDispose(c);
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char four[5] = {0};
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for (int i = 0; i < 4; i++) {
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uint8_t b = (uint8_t)(format >> (24 - 8 * i));
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four[i] = (b >= 0x20 && b < 0x7f) ? (char)b : '?';
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}
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printf("AudioConverterNew('%s', %.0f Hz, %u ch) = %d\n", four, rate, channels, (int)st);
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}
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int main(void) {
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void *h = dlopen("/System/Library/Frameworks/AudioToolbox.framework/AudioCodecs", RTLD_NOW);
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if (h) {
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printf("ok AudioCodecs loaded\n");
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const char *syms[] = {"UniDrcSelection", "mpddrc", "selectDownmixMatrix", "getSignalPeakLevel"};
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for (size_t i = 0; i < 4; i++) {
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printf(" %s: %s\n", syms[i], dlsym(h, syms[i]) ? "resolved" : "missing (stripped or hidden)");
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}
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} else {
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printf("x AudioCodecs cannot be dlopened\n");
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}
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audio_converter(0x64726331, 48000, 6); // 'drc1' 48 kHz 6 ch
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printf("CVE-2026-113912 · DRC path probed\n");
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return 0;
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}
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