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122 lines
3.0 KiB
122 lines
3.0 KiB
1 month ago
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#!/bin/sh
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#
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# Copyright 2013 Google LLC All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at:
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# american fuzzy lop - crash triage utility
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# -----------------------------------------
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#
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# Written and maintained by Michal Zalewski <lcamtuf@google.com>
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#
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# Note that this assumes that the targeted application reads from stdin
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# and requires no other cmdline parameters. Modify as needed if this is
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# not the case.
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#
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# Note that on OpenBSD, you may need to install a newer version of gdb
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# (e.g., from ports). You can set GDB=/some/path to point to it if
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# necessary.
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#
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echo "crash triage utility for afl-fuzz by <lcamtuf@google.com>"
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echo
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ulimit -v 100000 2>/dev/null
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ulimit -d 100000 2>/dev/null
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if [ "$#" -lt "2" ]; then
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echo "Usage: $0 /path/to/afl_output_dir /path/to/tested_binary [...target params...]" 1>&2
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echo 1>&2
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exit 1
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fi
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DIR="$1"
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BIN="$2"
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shift
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shift
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if [ "$AFL_ALLOW_TMP" = "" ]; then
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echo "$DIR" | grep -qE '^(/var)?/tmp/'
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T1="$?"
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echo "$BIN" | grep -qE '^(/var)?/tmp/'
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T2="$?"
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if [ "$T1" = "0" -o "$T2" = "0" ]; then
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echo "[-] Error: do not use shared /tmp or /var/tmp directories with this script." 1>&2
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exit 1
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fi
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fi
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if
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[ "$GDB" = "" ]; then
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GDB=gdb
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fi
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if [ ! -f "$BIN" -o ! -x "$BIN" ]; then
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echo "[-] Error: binary '$2' not found or is not executable." 1>&2
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exit 1
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fi
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if [ ! -d "$DIR/queue" ]; then
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echo "[-] Error: directory '$1' not found or not created by afl-fuzz." 1>&2
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exit 1
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fi
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CCOUNT=$((`ls -- "$DIR/crashes" 2>/dev/null | wc -l`))
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if [ "$CCOUNT" = "0" ]; then
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echo "No crashes recorded in the target directory - nothing to be done."
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exit 0
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fi
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echo
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for crash in $DIR/crashes/id:*; do
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id=`basename -- "$crash" | cut -d, -f1 | cut -d: -f2`
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sig=`basename -- "$crash" | cut -d, -f2 | cut -d: -f2`
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# Grab the args, converting @@ to $crash
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use_args=""
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use_stdio=1
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for a in $@; do
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if [ "$a" = "@@" ] ; then
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use_args="$use_args $crash"
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unset use_stdio
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else
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use_args="$use_args $a"
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fi
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done
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# Strip the trailing space
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use_args="${use_args# }"
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echo "+++ ID $id, SIGNAL $sig +++"
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echo
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if [ "$use_stdio" = "1" ]; then
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$GDB --batch -q --ex "r $use_args <$crash" --ex 'back' --ex 'disass $pc, $pc+16' --ex 'info reg' --ex 'quit' "$BIN" 0</dev/null
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else
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$GDB --batch -q --ex "r $use_args" --ex 'back' --ex 'disass $pc, $pc+16' --ex 'info reg' --ex 'quit' "$BIN" 0</dev/null
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fi
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echo
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done
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