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https://breakpad.appspot.com/622002/ git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1226 4c0a9323-5329-0410-9bdc-e9ce6186880e
87 lines
3.4 KiB
C++
87 lines
3.4 KiB
C++
// Copyright (c) 2013 Google Inc.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// exploitability_linux.cc: Linux specific exploitability engine.
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//
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// Provides a guess at the exploitability of the crash for the Linux
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// platform given a minidump and process_state.
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//
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// Author: Matthew Riley
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#include "processor/exploitability_linux.h"
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#include "google_breakpad/processor/process_state.h"
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#include "google_breakpad/processor/call_stack.h"
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#include "google_breakpad/processor/stack_frame.h"
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namespace {
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// This function in libc is called if the program was compiled with
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// -fstack-protector and a function's stack canary changes.
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const char kStackCheckFailureFunction[] = "__stack_chk_fail";
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// This function in libc is called if the program was compiled with
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// -D_FORTIFY_SOURCE=2, a function like strcpy() is called, and the runtime
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// can determine that the call would overflow the target buffer.
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const char kBoundsCheckFailureFunction[] = "__chk_fail";
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} // namespace
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namespace google_breakpad {
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ExploitabilityLinux::ExploitabilityLinux(Minidump *dump,
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ProcessState *process_state)
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: Exploitability(dump, process_state) { }
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ExploitabilityRating ExploitabilityLinux::CheckPlatformExploitability() {
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// Check the crashing thread for functions suggesting a buffer overflow or
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// stack smash.
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if (process_state_->requesting_thread() != -1) {
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CallStack* crashing_thread =
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process_state_->threads()->at(process_state_->requesting_thread());
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const vector<StackFrame*>& crashing_thread_frames =
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*crashing_thread->frames();
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for (size_t i = 0; i < crashing_thread_frames.size(); ++i) {
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if (crashing_thread_frames[i]->function_name ==
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kStackCheckFailureFunction) {
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return EXPLOITABILITY_HIGH;
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}
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if (crashing_thread_frames[i]->function_name ==
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kBoundsCheckFailureFunction) {
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return EXPLOITABILITY_HIGH;
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}
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}
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}
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return EXPLOITABILITY_NONE;
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}
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} // namespace google_breakpad
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