| // Copyright (c) 2010, Google Inc. |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE |
| |
| #include <stdlib.h> |
| #include <unistd.h> |
| |
| #include <string> |
| |
| #include "breakpad_googletest_includes.h" |
| #include "common/using_std_string.h" |
| #include "google_breakpad/processor/basic_source_line_resolver.h" |
| #include "google_breakpad/processor/minidump_processor.h" |
| #include "google_breakpad/processor/process_state.h" |
| #ifndef _WIN32 |
| #include "processor/exploitability_linux.h" |
| #endif // _WIN32 |
| #include "processor/simple_symbol_supplier.h" |
| |
| #ifndef _WIN32 |
| namespace google_breakpad { |
| |
| class ExploitabilityLinuxTest : public ExploitabilityLinux { |
| public: |
| using ExploitabilityLinux::CalculateAddress; |
| using ExploitabilityLinux::DisassembleBytes; |
| using ExploitabilityLinux::GetObjdumpInstructionLine; |
| using ExploitabilityLinux::TokenizeObjdumpInstruction; |
| }; |
| |
| class ExploitabilityLinuxTestMinidumpContext : public MinidumpContext { |
| public: |
| explicit ExploitabilityLinuxTestMinidumpContext( |
| const MDRawContextAMD64& context) : MinidumpContext(NULL) { |
| valid_ = true; |
| SetContextAMD64(new MDRawContextAMD64(context)); |
| SetContextFlags(MD_CONTEXT_AMD64); |
| } |
| }; |
| |
| } // namespace google_breakpad |
| #endif // _WIN32 |
| |
| namespace { |
| |
| using google_breakpad::BasicSourceLineResolver; |
| #ifndef _WIN32 |
| using google_breakpad::ExploitabilityLinuxTest; |
| using google_breakpad::ExploitabilityLinuxTestMinidumpContext; |
| #endif // _WIN32 |
| using google_breakpad::MinidumpProcessor; |
| using google_breakpad::ProcessState; |
| using google_breakpad::SimpleSymbolSupplier; |
| |
| string TestDataDir() { |
| return string(getenv("srcdir") ? getenv("srcdir") : ".") + |
| "/src/processor/testdata"; |
| } |
| |
| // Find the given dump file in <srcdir>/src/processor/testdata, process it, |
| // and get the exploitability rating. Returns EXPLOITABILITY_ERR_PROCESSING |
| // if the crash dump can't be processed. |
| google_breakpad::ExploitabilityRating |
| ExploitabilityFor(const string& filename) { |
| SimpleSymbolSupplier supplier(TestDataDir() + "/symbols"); |
| BasicSourceLineResolver resolver; |
| MinidumpProcessor processor(&supplier, &resolver, true); |
| processor.set_enable_objdump(true); |
| ProcessState state; |
| |
| string minidump_file = TestDataDir() + "/" + filename; |
| |
| if (processor.Process(minidump_file, &state) != |
| google_breakpad::PROCESS_OK) { |
| return google_breakpad::EXPLOITABILITY_ERR_PROCESSING; |
| } |
| |
| return state.exploitability(); |
| } |
| |
| TEST(ExploitabilityTest, TestWindowsEngine) { |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_HIGH, |
| ExploitabilityFor("ascii_read_av.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_HIGH, |
| ExploitabilityFor("ascii_read_av_block_write.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_HIGH, |
| ExploitabilityFor("ascii_read_av_clobber_write.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_HIGH, |
| ExploitabilityFor("ascii_read_av_conditional.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_HIGH, |
| ExploitabilityFor("ascii_read_av_then_jmp.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_HIGH, |
| ExploitabilityFor("ascii_read_av_xchg_write.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_HIGH, |
| ExploitabilityFor("ascii_write_av.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_HIGH, |
| ExploitabilityFor("ascii_write_av_arg_to_call.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_NONE, |
| ExploitabilityFor("null_read_av.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_NONE, |
| ExploitabilityFor("null_write_av.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_NONE, |
| ExploitabilityFor("stack_exhaustion.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_HIGH, |
| ExploitabilityFor("exec_av_on_stack.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_MEDIUM, |
| ExploitabilityFor("write_av_non_null.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_LOW, |
| ExploitabilityFor("read_av_non_null.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_LOW, |
| ExploitabilityFor("read_av_clobber_write.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_LOW, |
| ExploitabilityFor("read_av_conditional.dmp")); |
| } |
| |
| TEST(ExploitabilityTest, TestLinuxEngine) { |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_INTERESTING, |
| ExploitabilityFor("linux_null_read_av.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_HIGH, |
| ExploitabilityFor("linux_overflow.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_HIGH, |
| ExploitabilityFor("linux_stacksmash.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_NONE, |
| ExploitabilityFor("linux_divide_by_zero.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_INTERESTING, |
| ExploitabilityFor("linux_null_dereference.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_HIGH, |
| ExploitabilityFor("linux_jmp_to_0.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_HIGH, |
| ExploitabilityFor("linux_outside_module.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_NONE, |
| ExploitabilityFor("linux_raise_sigabrt.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_INTERESTING, |
| ExploitabilityFor("linux_inside_module_exe_region1.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_INTERESTING, |
| ExploitabilityFor("linux_inside_module_exe_region2.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_INTERESTING, |
| ExploitabilityFor("linux_stack_pointer_in_stack.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_INTERESTING, |
| ExploitabilityFor("linux_stack_pointer_in_stack_alt_name.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_HIGH, |
| ExploitabilityFor("linux_stack_pointer_in_module.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_HIGH, |
| ExploitabilityFor("linux_executable_stack.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_HIGH, |
| ExploitabilityFor("linux_executable_heap.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_HIGH, |
| ExploitabilityFor("linux_jmp_to_module_not_exe_region.dmp")); |
| #ifndef _WIN32 |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_HIGH, |
| ExploitabilityFor("linux_write_to_nonwritable_module.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_HIGH, |
| ExploitabilityFor("linux_write_to_nonwritable_region_math.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_HIGH, |
| ExploitabilityFor("linux_write_to_outside_module.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_HIGH, |
| ExploitabilityFor("linux_write_to_outside_module_via_math.dmp")); |
| ASSERT_EQ(google_breakpad::EXPLOITABILITY_INTERESTING, |
| ExploitabilityFor("linux_write_to_under_4k.dmp")); |
| #endif // _WIN32 |
| } |
| |
| #ifndef _WIN32 |
| TEST(ExploitabilityLinuxUtilsTest, DisassembleBytesTest) { |
| ASSERT_FALSE(ExploitabilityLinuxTest::DisassembleBytes("", NULL, 5, NULL)); |
| uint8_t bytes[6] = {0xc7, 0x0, 0x5, 0x0, 0x0, 0x0}; |
| char buffer[1024] = {0}; |
| ASSERT_TRUE(ExploitabilityLinuxTest::DisassembleBytes("i386:x86-64", |
| bytes, |
| 1024, |
| buffer)); |
| std::stringstream objdump_stream; |
| objdump_stream.str(string(buffer)); |
| string line = ""; |
| while (line.find("<.data>") == string::npos) |
| getline(objdump_stream, line); |
| getline(objdump_stream, line); |
| ASSERT_EQ(line, " 0:\tc7 00 05 00 00 00 \tmov DWORD PTR [rax],0x5"); |
| } |
| |
| TEST(ExploitabilityLinuxUtilsTest, GetObjdumpInstructionLine) { |
| string disassebly = |
| "\n" |
| "/tmp/breakpad_mem_region-raw_bytes-tMmMo0: file format binary\n" |
| "// Trying to confuse the parser 0:\n" |
| "\n" |
| "Disassembly of section .data:\n" |
| "\n" |
| "0000000000000000 <.data>:\n" |
| " 0:\tc7 00 01 00 00 00 \tmov DWORD PTR [rax],0x1\n" |
| " 6:\t5d \tpop rbp\n" |
| " 7:\tc3 \tret \n" |
| " 8:\t55 \tpush rbp\n" |
| " 9:\t48 89 e5 \tmov rbp,rsp\n" |
| " c:\t53 \tpush rbx\n" |
| " d:\t48 \trex.W\n" |
| " e:\t81 \t.byte 0x81\n"; |
| string line; |
| EXPECT_TRUE(ExploitabilityLinuxTest::GetObjdumpInstructionLine( |
| disassebly.c_str(), &line)); |
| EXPECT_EQ(" 0:\tc7 00 01 00 00 00 \tmov DWORD PTR [rax],0x1", line); |
| |
| // There is no "0:" after "<.data>:". Expected to return false. |
| disassebly = |
| "\n" |
| "/tmp/breakpad_mem_region-raw_bytes-tMmMo0: file format binary\n" |
| "// Trying to confuse the parser 0:\n" |
| "\n" |
| "Disassembly of section .data:\n" |
| "\n" |
| " 0:\tc7 00 01 00 00 00 \tmov DWORD PTR [rax],0x1\n" |
| " 6:\t5d \tpop rbp\n" |
| " 7:\tc3 \tret \n" |
| " 8:\t55 \tpush rbp\n" |
| " 9:\t48 89 e5 \tmov rbp,rsp\n" |
| " d:\t48 \trex.W\n" |
| "0000000000000000 <.data>:\n" |
| " c:\t53 \tpush rbx\n"; |
| EXPECT_FALSE(ExploitabilityLinuxTest::GetObjdumpInstructionLine( |
| disassebly.c_str(), &line)); |
| } |
| |
| TEST(ExploitabilityLinuxUtilsTest, TokenizeObjdumpInstructionTest) { |
| ASSERT_FALSE(ExploitabilityLinuxTest::TokenizeObjdumpInstruction("", |
| NULL, |
| NULL, |
| NULL)); |
| string line = "0: c7 00 05 00 00 00 mov DWORD PTR [rax],0x5"; |
| string operation = ""; |
| string dest = ""; |
| string src = ""; |
| ASSERT_TRUE(ExploitabilityLinuxTest::TokenizeObjdumpInstruction(line, |
| &operation, |
| &dest, |
| &src)); |
| ASSERT_EQ(operation, "mov"); |
| ASSERT_EQ(dest, "[rax]"); |
| ASSERT_EQ(src, "0x5"); |
| line = "0: c3 ret"; |
| ASSERT_TRUE(ExploitabilityLinuxTest::TokenizeObjdumpInstruction(line, |
| &operation, |
| &dest, |
| &src)); |
| ASSERT_EQ(operation, "ret"); |
| ASSERT_EQ(dest, ""); |
| ASSERT_EQ(src, ""); |
| line = "0: 5f pop rdi"; |
| ASSERT_TRUE(ExploitabilityLinuxTest::TokenizeObjdumpInstruction(line, |
| &operation, |
| &dest, |
| &src)); |
| ASSERT_EQ(operation, "pop"); |
| ASSERT_EQ(dest, "rdi"); |
| ASSERT_EQ(src, ""); |
| } |
| |
| TEST(ExploitabilityLinuxUtilsTest, CalculateAddressTest) { |
| MDRawContextAMD64 raw_context; |
| raw_context.rdx = 12345; |
| ExploitabilityLinuxTestMinidumpContext context(raw_context); |
| ASSERT_EQ(context.GetContextAMD64()->rdx, 12345U); |
| ASSERT_FALSE(ExploitabilityLinuxTest::CalculateAddress("", context, NULL)); |
| uint64_t write_address = 0; |
| ASSERT_TRUE(ExploitabilityLinuxTest::CalculateAddress("rdx-0x4D2", |
| context, |
| &write_address)); |
| ASSERT_EQ(write_address, 11111U); |
| ASSERT_TRUE(ExploitabilityLinuxTest::CalculateAddress("rdx+0x4D2", |
| context, |
| &write_address)); |
| ASSERT_EQ(write_address, 13579U); |
| ASSERT_FALSE(ExploitabilityLinuxTest::CalculateAddress("rdx+rax", |
| context, |
| &write_address)); |
| ASSERT_FALSE(ExploitabilityLinuxTest::CalculateAddress("0x3482+0x4D2", |
| context, |
| &write_address)); |
| } |
| #endif // _WIN32 |
| |
| } // namespace |
