diff options
Diffstat (limited to 'programs/fuzzer.c')
-rw-r--r-- | programs/fuzzer.c | 103 |
1 files changed, 99 insertions, 4 deletions
diff --git a/programs/fuzzer.c b/programs/fuzzer.c index 82f6090..b745be9 100644 --- a/programs/fuzzer.c +++ b/programs/fuzzer.c @@ -26,6 +26,9 @@ Remove Visual warning messages **************************************/ #define _CRT_SECURE_NO_WARNINGS // fgets +#ifdef _MSC_VER /* Visual Studio */ +# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */ +#endif /************************************** @@ -75,6 +78,11 @@ #define PRIME2 2246822519U #define PRIME3 3266489917U +#define KB *(1U<<10) +#define MB *(1U<<20) +#define GB *(1U<<30) + + //************************************** // Macros @@ -164,7 +172,7 @@ void FUZ_fillCompressibleNoiseBuffer(void* buffer, int bufferSize, double proba, } -int FUZ_SecurityTest() +int FUZ_Issue52() { char* output; char* input; @@ -179,7 +187,7 @@ int FUZ_SecurityTest() input[2] = 0x00; for(i = 3; i < 16840000; i++) input[i] = 0xff; - r = LZ4_decompress_fast(input, output, 20<<20); + r = LZ4_decompress_safe(input, output, 20<<20, 20<<20); free(input); free(output); @@ -187,6 +195,93 @@ int FUZ_SecurityTest() return 0; } + +#define MAX_NB_BUFF_I134 150 +#define BLOCKSIZE_I134 64 MB +int FUZ_Issue134() +{ + char* buffers[MAX_NB_BUFF_I134+1] = {0}; + int i, nbBuff; + + printf("Overflow test issue 134 : "); + + // Only possible in 32-bits + if (sizeof(void*)==8) + { + printf("64 bits mode : not applicable \n"); + return 0; + } + + printf(" "); + for (nbBuff=0; nbBuff < MAX_NB_BUFF_I134; nbBuff++) + { + printf("\b\b\b\b%3i ", nbBuff); + buffers[nbBuff] = (char*)malloc(BLOCKSIZE_I134); + if (buffers[nbBuff]==NULL) + { + printf(" : unable to allocate more memory\n"); + for (i=0 ; i<nbBuff; i++) free(buffers[i]); + return 0; + } + if ((size_t)buffers[nbBuff] > 0) // (size_t) 0x80000000) + { + printf("Testing memory buffer address %X , ", (U32)(size_t)(buffers[nbBuff])); + printf("Creating a payload designed to fail\n"); + buffers[++nbBuff] = (char*)malloc(BLOCKSIZE_I134); + if (buffers[nbBuff]==NULL) + { + printf("failed to test (no more memory)\n"); + for (i=0 ; i<nbBuff; i++) free(buffers[i]); + return 0; + } + { + size_t sizeToGenerateOverflow = (size_t)(- ((size_t)buffers[nbBuff-1]) + 512); + size_t nbOf255 = (sizeToGenerateOverflow / 255) + 1; + char* input = buffers[nbBuff-1]; + char* output = buffers[nbBuff]; + int r; + input[0] = 0xF0; // Literal length overflow + input[1] = 0xFF; + input[2] = 0xFF; + input[3] = 0xFF; + for(i = 3; (size_t)i <= nbOf255+4; i++) input[i] = 0xff; + r = LZ4_decompress_safe(input, output, nbOf255+64, BLOCKSIZE_I134); + printf(" Literal overflow detected (return = %i < 0)\n",r); + input[0] = 0x1F; // Match length overflow + input[1] = 0x01; + input[2] = 0x01; + input[3] = 0x00; + r = LZ4_decompress_safe(input, output, nbOf255+64, BLOCKSIZE_I134); + printf(" Match overflow detected (return = %i < 0)\n",r); + if (nbBuff>=2) + { + output = buffers[nbBuff-2]; + memset(input, 0, BLOCKSIZE_I134); + input[0] = 0xF0; // Literal length overflow + input[1] = 0xFF; + input[2] = 0xFF; + input[3] = 0xFF; + r = LZ4_decompress_safe(input, output, nbOf255+64, BLOCKSIZE_I134); + printf(" Literal overflow detected (return = %i < 0)\n",r); + input[0] = 0x1F; // Match length overflow + input[1] = 0x01; + input[2] = 0x01; + input[3] = 0x00; + r = LZ4_decompress_safe(input, output, nbOf255+64, BLOCKSIZE_I134); + printf(" Match overflow detected (return = %i < 0)\n",r); + } + } + free (buffers[nbBuff]); nbBuff--; + } + } + + for (i=0 ; i<nbBuff; i++) free(buffers[i]); + printf("\n"); + return 0; +} + + + #define FUZ_MAX(a,b) (a>b?a:b) int FUZ_test(U32 seed, int nbCycles, int startCycle, double compressibility) { @@ -642,7 +737,6 @@ int main(int argc, char** argv) { default: ; } } - } } @@ -663,7 +757,8 @@ int main(int argc, char** argv) { printf("Seed = %u\n", seed); if (proba!=FUZ_COMPRESSIBILITY_DEFAULT) printf("Compressibility : %i%%\n", proba); - FUZ_SecurityTest(); + FUZ_Issue52(); + FUZ_Issue134(); if (nbTests<=0) nbTests=1; |