This is an RFC, please do not commit.
Usage: Run abrt-action-analyze-vulnerability in a directory which contains ./coredump file. If crash looks exploitable, the tool creates ./exploitable file. Example such a file:
""" Likely crash reason: Write to an invalid address Exploitable rating (0-9 scale): 6 """
This patch adds abrt-action-analyze-vulnerability invocation to "EVENT=post-create analyzer=CCpp".
TODO: * improve error detection (e.g. what to do if gdb failed to run?) * suppress stray gdb output * set $SIGNO_OF_THE_COREDUMP to work around non-working $_siginfo.si_signo * decide whether to push for $_signo support in gdb (I have a tested gdb patch) * instruction analyzer is x86 specific now, make it per-arch (how to get arch name???)
v2: improved instruction analyzer, added more exploibable cases to detect, added tests
Signed-off-by: Denys Vlasenko dvlasenk@redhat.com --- abrt.spec.in | 2 + src/plugins/Makefile.am | 10 +- src/plugins/abrt-action-analyze-vulnerability | 9 + src/plugins/abrt-gdb-exploitable | 502 +++++++++++++++++++++ src/plugins/ccpp_event.conf | 5 +- tests/abrt-exploitable/.gitignore | 10 + tests/abrt-exploitable/Makefile | 67 +++ tests/abrt-exploitable/testDivideByZero.c | 10 + tests/abrt-exploitable/testExecuteInvalid.c | 17 + .../abrt-exploitable/testFloatingPointException.c | 10 + tests/abrt-exploitable/testReadNull.c | 12 + tests/abrt-exploitable/testReadRandom.c | 14 + tests/abrt-exploitable/testSignalAbort.c | 10 + tests/abrt-exploitable/testSignalIll.c | 10 + tests/abrt-exploitable/testStackBufferOverflow.c | 23 + tests/abrt-exploitable/testStackRecursion.c | 15 + tests/abrt-exploitable/testWriteRandom.c | 15 + 17 files changed, 738 insertions(+), 3 deletions(-) create mode 100755 src/plugins/abrt-action-analyze-vulnerability create mode 100755 src/plugins/abrt-gdb-exploitable create mode 100644 tests/abrt-exploitable/.gitignore create mode 100644 tests/abrt-exploitable/Makefile create mode 100644 tests/abrt-exploitable/testDivideByZero.c create mode 100644 tests/abrt-exploitable/testExecuteInvalid.c create mode 100644 tests/abrt-exploitable/testFloatingPointException.c create mode 100644 tests/abrt-exploitable/testReadNull.c create mode 100644 tests/abrt-exploitable/testReadRandom.c create mode 100644 tests/abrt-exploitable/testSignalAbort.c create mode 100644 tests/abrt-exploitable/testSignalIll.c create mode 100644 tests/abrt-exploitable/testStackBufferOverflow.c create mode 100644 tests/abrt-exploitable/testStackRecursion.c create mode 100644 tests/abrt-exploitable/testWriteRandom.c
diff --git a/abrt.spec.in b/abrt.spec.in index fec5b56..ce5f944 100644 --- a/abrt.spec.in +++ b/abrt.spec.in @@ -670,6 +670,7 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || : %{_initrddir}/abrt-ccpp %endif %{_libexecdir}/abrt-hook-ccpp +%{_libexecdir}/abrt-gdb-exploitable
# attr(6755) ~= SETUID|SETGID %attr(6755, abrt, abrt) %{_libexecdir}/abrt-action-install-debuginfo-to-abrt-cache @@ -677,6 +678,7 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || : %{_bindir}/abrt-action-analyze-c %{_bindir}/abrt-action-trim-files %{_bindir}/abrt-action-analyze-core +%{_bindir}/abrt-action-analyze-vulnerability %{_bindir}/abrt-action-install-debuginfo %{_bindir}/abrt-action-generate-backtrace %{_bindir}/abrt-action-generate-core-backtrace diff --git a/src/plugins/Makefile.am b/src/plugins/Makefile.am index 767c045..20e0297 100644 --- a/src/plugins/Makefile.am +++ b/src/plugins/Makefile.am @@ -3,6 +3,7 @@ bin_SCRIPTS = \ abrt-action-install-debuginfo \ abrt-action-analyze-core \ + abrt-action-analyze-vulnerability \ abrt-action-analyze-vmcore \ abrt-action-list-dsos \ abrt-action-perform-ccpp-analysis \ @@ -29,9 +30,12 @@ bin_PROGRAMS += \ abrt-bodhi endif
-libexec_PROGRAMS = abrt-action-install-debuginfo-to-abrt-cache +libexec_PROGRAMS = \ + abrt-action-install-debuginfo-to-abrt-cache
-libexec_SCRIPTS = abrt-action-ureport +libexec_SCRIPTS = \ + abrt-action-ureport \ + abrt-gdb-exploitable
#dist_pluginsconf_DATA = Python.conf
@@ -68,6 +72,7 @@ PYTHON_FILES = \ abrt-action-install-debuginfo.in \ abrt-action-list-dsos \ abrt-action-analyze-core \ + abrt-action-analyze-vulnerability \ abrt-action-analyze-vmcore.in \ abrt-action-perform-ccpp-analysis.in
@@ -84,6 +89,7 @@ EXTRA_DIST = \ abrt-action-analyze-vmcore \ abrt-action-save-kernel-data \ abrt-action-ureport \ + abrt-gdb-exploitable \ https-utils.h \ post_report.xml.in \ abrt-action-analyze-ccpp-local diff --git a/src/plugins/abrt-action-analyze-vulnerability b/src/plugins/abrt-action-analyze-vulnerability new file mode 100755 index 0000000..f2a410e --- /dev/null +++ b/src/plugins/abrt-action-analyze-vulnerability @@ -0,0 +1,9 @@ +#!/bin/sh + +if type gdb >/dev/null 2>&1; then + # gdb is avaliable + gdb --batch \ + -ex 'python execfile("/usr/libexec/abrt-gdb-exploitable")' \ + -ex 'core-file ./coredump' \ + -ex 'abrt-exploitable 5 ./exploitable' +fi diff --git a/src/plugins/abrt-gdb-exploitable b/src/plugins/abrt-gdb-exploitable new file mode 100755 index 0000000..4f73e0b --- /dev/null +++ b/src/plugins/abrt-gdb-exploitable @@ -0,0 +1,502 @@ +#!/usr/bin/python +# This is a GDB plugin. +# Usage: +# gdb --batch -ex 'python execfile("THIS_FILE")' -ex run -ex abrt-exploitable PROG +# or +# gdb --batch -ex 'python execfile("THIS_FILE")' -ex 'core COREDUMP' -ex abrt-exploitable + +import gdb +import os +import signal + +_writing_instr = { + # insn:N, where N: + # -1: this insn always writes to memory + # -2: writes to memory if any operand is a memory operand + # 2: writes to memory if 2nd (or later) operand is a memory operand + # + # Two-operand insns + "add":2, + "adc":2, + "sub":2, + "sbb":2, + "and":2, + "xor":2, + "or":2, + "xadd":2, + "cmpxchg":2, + # One-operand insns. Can use 1 or -2 + "inc":-2, + "dec":-2, + "neg":-2, + "not":-2, + "pop":-2, + # "Set byte on condition". One-operand insns. + "seta":-2, + "setae":-2, + "setb":-2, + "setbe":-2, + "setc":-2, + "sete":-2, + "setg":-2, + "setge":-2, + "setl":-2, + "setle":-2, + "setna":-2, + "setnae":-2, + "setnb":-2, + "setnbe":-2, + "setnc":-2, + "setne":-2, + "setng":-2, + "setnge":-2, + "setnl":-2, + "setnle":-2, + "setno":-2, + "setnp":-2, + "setns":-2, + "setnz":-2, + "seto":-2, + "setp":-2, + "setpe":-2, + "setpo":-2, + "sets":-2, + "setz":-2, + # Shifts. + # sarl $2,(%rcx) + # sarl (%rax) - *implicit* operand (shift count) 1. + # shld 11,%ecx,(%rdi) - *third* operand is r/m. + # Luckily, any memory operand is a destination, can use -2. + "shl":-2, + "shr":-2, + "sal":-2, + "sar":-2, + "rol":-2, + "ror":-2, + "rcl":-2, + "rcr":-2, + "shld":-2, + "shrd":-2, + # Bit tests. Any memory operand is a destination, can use -2. + "bts":-2, + "btr":-2, + "btc":-2, + # One-operand (register pair is another, implicit operand). + "cmpxchg8b":-2, + "cmpxchg16b":-2, + + # Either mem operand indicates write to mem. + "xchg":-2, + + # String store insns. + # Look similar to widening signed move "movs[bwl][wlq]", + # but aliasing doesn't happen since widening move has two siffixes + "movs":-1, + "stos":-1, + # Widening moves never store to mem. + # May look like we need to list them because otherwise they get caught + # by "movXXX", but thankfully their 2nd operand is never a memory reference, + # which "movXXX" wildcard checks. + #"mov[sz][bwl][wlq]":0, + + # One-operand insn. + # These are system insns, but they do NOT cause exception in userspace. + "smsw":-2, + "sgdt":-2, + "sidt":-2, + "sldt":-2, + "str":-2, + + # FPU/SIMD madness follows. + + # FPU store insns. One-operand. + "fsts":-2, + "fstl":-2, + #"fstt" doesn't exist + "fstps":-2, + "fstpl":-2, + "fstpt":-2, + # Saving state. One-operand insns. + "fstcw":-2, + "fnstcw":-2, + "fstsw":-2, + "fnstsw":-2, + "fstenv":-2, + "fnstenv":-2, + "fsave":-2, + "fnsave":-2, + "fxsave":-2, + "xsave":-2, + "xsaveopt":-2, + "fsave64":-2, + "fnsave64":-2, + "fxsave64":-2, + "xsave64":-2, + "xsaveopt64":-2, + "stmxcsr":-2, + "vstmxcsr":-2, + # SIMD store insns. + # Three-operand insns. Any memory operand is a destination. + "vcvtps2ph":-2, + "extractps":-2, + "vextractps":-2, + #[v]extractpd does not exist + "vextractf128":-2, + "vextracti128":-2, + "pextr":-2, # covers pextr[bwq] + "pextrd":-2, + "vpextr":-2, + "vpextrd":-2, + "vmaskmovpd":-2, + "vmaskmovps":-2, + "vpmaskmovd":-2, + "vpmaskmovq":-2, + # These insns have implicit (%edi) dest operand: + "maskmovq":-1, # mmx version + "maskmovdqu":-1, + "vmaskmovdqu":-1, + + # check binutils/gas/testsuite/gas/i386/* for more weird insns + # Instruction Set Reference, A-M and N-Z: + # http://download.intel.com/products/processor/manual/253666.pdf + # http://download.intel.com/products/processor/manual/253667.pdf + # SSE4: + # http://software.intel.com/sites/default/files/m/0/3/c/d/4/18187-d9156103.pdf + # Instruction Set Extensions: + # http://download-software.intel.com/sites/default/files/319433-014.pdf + # Xeon Phi: + # http://download-software.intel.com/sites/default/files/forum/278102/32736400... + + #"vmovXXX" - special-cased in the code + "mov":2 + + # Note: stack-writing instructions are omitted +} + +_pushing_instr = { + "push":-1, + "pusha":-1, + "pushf":-1, + "enter":-1, + "call":-1, + "lcall":-1 +} + +_intdiv_instr = { + "div":-1, + "idiv":-1 +} + +_jumping_instr = { + "jmp":-1, # indirect jumps/calls with garbage data + "call":-1, # call: also possible that stack is exhausted (infinite recursion) + "ljmp":-1, + "lcall":-1, + # Yes, lret/iret isn't used in normal userspace code, + # but it does work (compile with "gcc -nostartfiles -nostdlib -m32"): + # + #_start: .globl _start + # pushf + # push %cs + # push $next + # iret # lret or ret would work too + #next: + # movl $42, %ebx + # movl $1, %eax + # int $0x80 # exit(42) + # + "iret":-1, + "lret":-1, + "ret":-1 +} + +_return_instr = { + "iret":-1, + "lret":-1, + "ret":-1 # stack smashed if we crash on this +} + +def _fetch_insn_from_table(ins, table): + if not ins: + return None + if ins in table.keys(): + return table[ins] + # Drop common byte/word/long/quad suffix and try again + if ins[-1] in ("b", "w", "l", "q"): + ins = ins[:-1] + if ins in table.keys(): + return table[ins] + return None + +def _instruction_is_writing(self): + operand = _fetch_insn_from_table(self.mnemonic, _writing_instr) + if not operand: + if not self.mnemonic: + return False + # There are far too many SSE store instructions, + # don't want to pollute the table with them. + # Special-case the check for MOVxxx + # and its SIMD cousins VMOVxxx: + if self.mnemonic[:3] != "mov" and self.mnemonic[:4] != "vmov": + return False + operand = 2 + + if operand == -1: # no need to check operands, it's a write + return True + + # Memory operands look like this: [%seg:][[-]0xHEXNUM][(%reg[,...])] + # Careful with immediate operands which are $0xHEXNUM + # and FPU register references which are st(N). + if self.operands.startswith("0x") or self.operands.startswith("-0x") or self.operands.startswith("("): + mem_op_pos = 0 + else: + mem_op_pos = self.operands.find(",0x") + if mem_op_pos < 0: + mem_op_pos = self.operands.find(",-0x") + if mem_op_pos < 0: + mem_op_pos = self.operands.find(":0x") + if mem_op_pos < 0: + mem_op_pos = self.operands.find(":-0x") + if mem_op_pos < 0: + mem_op_pos = self.operands.find(",(") + if mem_op_pos < 0: + mem_op_pos = self.operands.find(":(") + if mem_op_pos < 0: + return False # no memory operands + mem_op_pos += 1 + + if operand == -2: # any mem operand indicates write + return True + + comma = self.operands.find(",") + if mem_op_pos < comma: + # "%cs:0x0(%rax,%rax,1),foo" - 1st operand is memory + # "%cs:0x0(%rax),foo" - 1st operand is memory + memory_operand = 1 + elif comma < 0: + # "%cs:0x0(%rax)" - 1st operand is memory + memory_operand = 1 + else: + # mem_op_pos is after comma + # "foo,%cs:0x0(%rax,%rax,1)" - 2nd operand is memory + # (It also can be a third, fourth etc operand) + memory_operand = 2 + + if operand == memory_operand: + return True + return False + +def _instruction_is_pushing(self): + if _fetch_insn_from_table(self.mnemonic, _pushing_instr): + return True + return False + +def _instruction_is_division(self): + if _fetch_insn_from_table(self.mnemonic, _intdiv_instr): + return True + return False + +def _instruction_is_jumping(self): + if _fetch_insn_from_table(self.mnemonic, _jumping_instr): + return True + return False + +def _instruction_is_return(self): + if _fetch_insn_from_table(self.mnemonic, _return_instr): + return True + return False + +class _Signal_and_Insn: + pass + +def _get_signal_and_instruction(): + si = _Signal_and_Insn() + si.signo = None + try: + sig = gdb.parse_and_eval("$_signo") # ("$_siginfo.si_signo") + # type(sig) = <type 'gdb.Value'> + # sig is 8 (for SIGFPE) + si.signo = int(sig) + except gdb.error: + # Python Exception <class 'gdb.error'> Attempt to extract a component of a value that is not a structure.: + # Possible reasons why $_siginfo doesn't exist: + # program is still running, program exited normally, + # we work with a coredump from an old kernel. + # + # HACK_ALERT: kernels before 3.?.? do not record siginfo in coredumps, + # so $_siginfo isn't present. + # Lets see whether we are running from the abrt and it provided us with signal number + # + try: + si.signo = int(os.environ["SIGNO_OF_THE_COREDUMP"]) + except KeyError: + return None + + si.current_instruction = None + si.mnemonic = None + si.operands = "" + try: + # just "disassemble $pc" won't work if $pc doesn't point + # inside a known function + instructions = gdb.execute("disassemble $pc,$pc+32", to_string=True) + # type(instructions) = <type 'str'> + except gdb.error: + # For example, if tracee already exited normally. + # Another observed case is if $pc points to unmapped area. + # Python Exception <class 'gdb.error'> No registers.: + return si + + raw_instructions = instructions + #print instructions + instructions = [] + current = None + for line in raw_instructions.split("\n"): + # line can be: + # "Dump of assembler code from 0xAAAA to 0xBBBB:" + # "[=>] 0x00000000004004dc[ <+0>]: push %rbp" + # (" <+0>" part is present when we run on a live process, + # on coredump it is absent) + # "End of assembler dump." + # "" (empty line) + if line.startswith("=>"): + line = line[2:] + current = len(instructions) + line = line.split(":", 1) + if len(line) < 2: # no ":"? + continue + line = line[1] # drop "foo:" + line = line.strip() # drop leading/trailing whitespace + if line: + instructions.append(line) + if current == None: + # not False! we determined that $pc points to a bad address, + # which is an interesting fact. + return si + + si.current_instruction = instructions[current] + # TODO: too simplistic. + # consider this example: + # "data32 data32 data32 nopw %cs:0x0(%rax,%rax,1)" + t = si.current_instruction.split(None,2) + si.mnemonic = t[0] + if len(t) > 1: + si.operands = t[1] + return si + +#Our initial set of testing will use the list Apple included in their +#CrashWrangler announcement: +# +#Exploitable if: +# Crash on write instruction +# Crash executing invalid address +# Crash calling an invalid address +# Crash accessing an uninitialized or freed pointer as indicated by +# using the MallocScribble environment variable +# Illegal instruction exception +# Abort due to -fstack-protector, _FORTIFY_SOURCE, heap corruption +# detected +# Stack trace of crashing thread contains certain functions such as +# malloc, free, szone_error, objc_MsgSend, etc. + +def _is_exploitable(self): + self.exploitable_rating = 3 + self.exploitable_desc = "" + + if 0: + pass + # SIGABRT Abort signal from abort(3) + # SIGQUIT Quit from keyboard + # SIGXCPU CPU time limit exceeded + # SIGXFSZ File size limit exceeded + # SIGTRAP Trace/breakpoint trap + # SIGSYS Bad argument to routine (SVr4) + # SIGFPE Floating point exception + # SIGILL Illegal Instruction + # SIGSEGV Invalid memory reference + # SIGBUS Bus error (bad memory access) + elif self.signo == signal.SIGABRT: + self.exploitable_rating = 0 + self.exploitable_desc = "ABRT signal (abort() was called?)" + elif self.signo == signal.SIGQUIT: + self.exploitable_rating = 0 + self.exploitable_desc = "QUIT signal (Ctrl-\ pressed?)" + elif self.signo == signal.SIGXCPU: + self.exploitable_rating = 0 + self.exploitable_desc = "XCPU signal (over CPU time limit)" + elif self.signo == signal.SIGXFSZ: + self.exploitable_rating = 0 + self.exploitable_desc = "XFSZ signal (over file size limit)" + elif self.signo == signal.SIGTRAP: + self.exploitable_rating = 0 + self.exploitable_desc = "TRAP signal (can be a bug in a debugger/tracer)" + elif self.signo == signal.SIGSYS: + self.exploitable_rating = 1 + self.exploitable_desc = "SYS signal (unknown/masked syscall was called?)" + + elif self.signo == signal.SIGFPE: + self.exploitable_rating = 1 + self.exploitable_desc = "Arithmetic exception occurred" + if _instruction_is_division(self): + self.exploitable_rating = 0 + self.exploitable_desc = "Division by zero occurred" + elif self.signo == signal.SIGILL: + self.exploitable_rating = 5 + self.exploitable_desc = "Illegal instruction (jump to a random address?)" + + # TODO: check that sig is SIGSEGV/SIGBUS? + + elif _instruction_is_pushing(self): + self.exploitable_rating = 4 + self.exploitable_desc = "Stack overflow" + elif _instruction_is_writing(self): + self.exploitable_rating = 6 + self.exploitable_desc = "Write to an invalid address" + elif _instruction_is_return(self): + self.exploitable_rating = 7 + self.exploitable_desc = "Subroutine return to an invalid address (corrupted stack?)" + # Note: we check "ret" first, _then_ jumps. + # Corrupted stack is different from corrupted data. + elif _instruction_is_jumping(self): + self.exploitable_rating = 6 + self.exploitable_desc = "Jump to an invalid address" + elif not self.current_instruction: + self.exploitable_rating = 6 + self.exploitable_desc = "Jump to an invalid address" + elif self.signo == signal.SIGBUS: + self.exploitable_rating = 5 + self.exploitable_desc = "Access past the end of mapped file, invalid address, unaligned access, etc" + #elif self.signo = signal.SIGfoo: + +class AbrtExploitable(gdb.Command): + "Analyze a crash to determine exploitability" + def __init__(self): + super(AbrtExploitable, self).__init__( + "abrt-exploitable", + gdb.COMMAND_SUPPORT, # command class + gdb.COMPLETE_NONE, # completion method + False # => it's not a prefix command + ) + + # Called when the command is invoked from GDB + def invoke(self, args, from_tty): + si = _get_signal_and_instruction() + #print "w", _instruction_is_writing(self) + f = sys.stdout + min_rating = 0 + if args: + args = args.split(None, 1) + min_rating = int(args[0]) + if len(args) > 1: + f = open(args[1], 'w') + if not si: + sys.stderr.write("Can't get signal no and do exploitability analysis\n") + return + _is_exploitable(si) + if si.exploitable_desc: + if si.exploitable_rating >= min_rating: + f.write("Likely crash reason: " + si.exploitable_desc + "\n") + f.write("Exploitable rating (0-9 scale): " + str(si.exploitable_rating) + "\n") + else: + sys.stderr.write("Exploitability analysis on this crash came up empty\n") + +AbrtExploitable() diff --git a/src/plugins/ccpp_event.conf b/src/plugins/ccpp_event.conf index dfc4908..aa8cdb3 100644 --- a/src/plugins/ccpp_event.conf +++ b/src/plugins/ccpp_event.conf @@ -15,10 +15,13 @@ EVENT=post-create analyzer=CCpp exit 1 fi # Try generating backtrace, if it fails we can still use - # the UUID generated by abrt-action-analyze-c + # the hash generated by abrt-action-analyze-c ##satyr migration: #satyr abrt-create-core-stacktrace "$DUMP_DIR" abrt-action-generate-core-backtrace + # Run GDB plugin to see if crash looks exploitable + abrt-action-analyze-vulnerability + # Generate hash abrt-action-analyze-c && abrt-action-list-dsos -m maps -o dso_list && ( diff --git a/tests/abrt-exploitable/.gitignore b/tests/abrt-exploitable/.gitignore new file mode 100644 index 0000000..b0c3b29 --- /dev/null +++ b/tests/abrt-exploitable/.gitignore @@ -0,0 +1,10 @@ +testDivideByZero +testExecuteInvalid +testFloatingPointException +testReadNull +testReadRandom +testSignalAbort +testSignalIll +testStackBufferOverflow +testStackRecursion +testWriteRandom diff --git a/tests/abrt-exploitable/Makefile b/tests/abrt-exploitable/Makefile new file mode 100644 index 0000000..fe4078d --- /dev/null +++ b/tests/abrt-exploitable/Makefile @@ -0,0 +1,67 @@ +# Copyright (C) 2010, 2011 Red Hat, Inc. +# +# This file is part of ABRT. +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see http://www.gnu.org/licenses/. + +CFLAGS=-g + +TESTS=\ + testDivideByZero\ + testReadNull\ + testStackRecursion\ + testReadRandom\ + testSignalAbort\ + testSignalIll\ + testWriteRandom\ + testExecuteInvalid\ + testStackBufferOverflow\ + testFloatingPointException\ + +all: $(TESTS) + +clean: + rm -f $(TESTS) + +testlive: + for t in $(TESTS); do \ + echo "====="; \ + echo "Test: $$t"; \ + gdb --batch \ + -ex 'python execfile("../../src/plugins/abrt-gdb-exploitable")' \ + -ex 'run' \ + -ex 'disas $$pc-16,$$pc+16' \ + -ex 'abrt-exploitable' \ + -ex 'cont' \ + -ex 'quit' \ + ./$$t; \ + done 2>&1 | tee testlive.log + +testcore: + rm ./core* 2>/dev/null; \ + ulimit -c unlimited; \ + for t in $(TESTS); do \ + echo "====="; \ + echo "Test: $$t"; \ + ./$$t && { echo "No crash???"; continue; }; \ + mv core* core || { echo "No corefile???"; continue; }; \ + gdb --batch \ + -ex 'python execfile("../../src/plugins/abrt-gdb-exploitable")' \ + -ex 'core ./core' \ + -ex 'disas $$pc-16,$$pc+16' \ + -ex 'abrt-exploitable' \ + -ex 'quit' \ + ; \ + rm ./core; \ + done 2>&1 | tee testcore.log diff --git a/tests/abrt-exploitable/testDivideByZero.c b/tests/abrt-exploitable/testDivideByZero.c new file mode 100644 index 0000000..06d1551 --- /dev/null +++ b/tests/abrt-exploitable/testDivideByZero.c @@ -0,0 +1,10 @@ +/* + * Test a divide by zero error + * This error is not exploitable + */ + +#include <stdio.h> + +int main(int argc, char *argv[]) { + printf("%d\n", 7/0); +} diff --git a/tests/abrt-exploitable/testExecuteInvalid.c b/tests/abrt-exploitable/testExecuteInvalid.c new file mode 100644 index 0000000..86ce515 --- /dev/null +++ b/tests/abrt-exploitable/testExecuteInvalid.c @@ -0,0 +1,17 @@ +/* + * Test a crash attempting to execute an invalid address + * This error is exploitable + */ + +#include <stdlib.h> +#include <string.h> + +int (*function_pointer)(); + +int main(int argc, char *argv[]) { + char *a; + a = malloc(1024); + a = (size_t)a * 1024; // This should put us well outside the valid memory range + function_pointer = a; + function_pointer(); +} diff --git a/tests/abrt-exploitable/testFloatingPointException.c b/tests/abrt-exploitable/testFloatingPointException.c new file mode 100644 index 0000000..53e8762 --- /dev/null +++ b/tests/abrt-exploitable/testFloatingPointException.c @@ -0,0 +1,10 @@ +/* + * Test the illegal instruction signal + * This error is exploitable + */ + +#include <signal.h> + +int main(int argc, char *argv[]) { + raise(SIGFPE); +} diff --git a/tests/abrt-exploitable/testReadNull.c b/tests/abrt-exploitable/testReadNull.c new file mode 100644 index 0000000..548cf73 --- /dev/null +++ b/tests/abrt-exploitable/testReadNull.c @@ -0,0 +1,12 @@ +/* + * Test a NULL read + * This error is not exploitable + */ + +#include <stdio.h> + +int main(int argc, char *argv[]) { + char *a; + a = 0x0; + puts(a); +} diff --git a/tests/abrt-exploitable/testReadRandom.c b/tests/abrt-exploitable/testReadRandom.c new file mode 100644 index 0000000..8493078 --- /dev/null +++ b/tests/abrt-exploitable/testReadRandom.c @@ -0,0 +1,14 @@ +/* + * Test a crash attempting to read invalid memory + * This error is not exploitable + */ + +#include <stdio.h> +#include <stdlib.h> + +int main(int argc, char *argv[]) { + char *a; + a = malloc(1024); + a = (size_t)a * 1024; // This should put us well outside the valid memory range + printf("%s\n", a); +} diff --git a/tests/abrt-exploitable/testSignalAbort.c b/tests/abrt-exploitable/testSignalAbort.c new file mode 100644 index 0000000..fc41227 --- /dev/null +++ b/tests/abrt-exploitable/testSignalAbort.c @@ -0,0 +1,10 @@ +/* + * Test the abort signal + * This error is not exploitable + */ + +#include <signal.h> + +int main(int argc, char *argv[]) { + raise(SIGABRT); +} diff --git a/tests/abrt-exploitable/testSignalIll.c b/tests/abrt-exploitable/testSignalIll.c new file mode 100644 index 0000000..7783263 --- /dev/null +++ b/tests/abrt-exploitable/testSignalIll.c @@ -0,0 +1,10 @@ +/* + * Test the illegal instruction signal + * This error is exploitable + */ + +#include <signal.h> + +int main(int argc, char *argv[]) { + raise(SIGILL); +} diff --git a/tests/abrt-exploitable/testStackBufferOverflow.c b/tests/abrt-exploitable/testStackBufferOverflow.c new file mode 100644 index 0000000..fcbd95f --- /dev/null +++ b/tests/abrt-exploitable/testStackBufferOverflow.c @@ -0,0 +1,23 @@ +/* + * Test a stack buffer overflow + * This test could be exploitable (it needs further analysis) + */ + +#include <stdio.h> + +int i; + +int my_function() { + char a[2]; + + for (i = 0; i < 1024; i++) { + a[i] = 'A'; + } + printf("%s\n", a); +} + +int main(int argc, char *argv[]) { + my_function(); + my_function(); + return 0; +} diff --git a/tests/abrt-exploitable/testStackRecursion.c b/tests/abrt-exploitable/testStackRecursion.c new file mode 100644 index 0000000..dddf583 --- /dev/null +++ b/tests/abrt-exploitable/testStackRecursion.c @@ -0,0 +1,15 @@ +/* + * Test a crash from stack recursion + * This error is not exploitable + */ + +#include <stdio.h> + +void my_function() { + char a[1024]; + my_function(); +} + +int main(int argc, char *argv[]) { + my_function(); +} diff --git a/tests/abrt-exploitable/testWriteRandom.c b/tests/abrt-exploitable/testWriteRandom.c new file mode 100644 index 0000000..812f94c --- /dev/null +++ b/tests/abrt-exploitable/testWriteRandom.c @@ -0,0 +1,15 @@ +/* + * Test a crash attempting to write invalid memory + * This error is exploitable + */ + +#include <stdlib.h> +#include <string.h> + +int main(int argc, char *argv[]) { + char *a; + char b[] = "pwnt"; + a = malloc(1024); + a = (size_t)a * 1024; // This should put us well outside the valid memory range + strcpy(a, b); +}