First commit

.gitignore

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+.gradle/
+build/
+out/

LICENSE

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+MIT License
+
+Copyright (c) 2020 BishopFox
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+<p align="center">
+  <img src="assets/GadgetProbe.svg" width=700/>
+</p>
+
+#
+
+
+
+![License](https://img.shields.io/badge/license-MIT-lightgrey.svg)
+![Python version](https://img.shields.io/badge/java-8%2b-blue.svg)
+
+## Description
+
+You just found a Java deserialization bug, you ran all your ysoserial payloads, and.... you got nothing. What now? How can you debug or build a gadget chain if you're totally blind?
+
+Introducing GadgetProbe, a tool that shines a light on remote classpaths and raises bug severity for all!
+
+GadgetProbe takes a wordlist of Java classes, outputs serialized DNS callback objects, and reports what's lurking in the remote classpath.
+
+### Burp Extension Usage
+
+The Burp extension automatically integrates with Burp Collaborator to handle DNS callbacks. The extension also includes signatures and an analyzer to identify library versions of popular sources for gadgets.
+
+Download the [release](https://github.com/BishopFox/GadgetProbe/releases/) or follow the [build instructions](#building-from-source) below.
+
+After loading the Burp extension:
+
+1. Send the vulnerable request to intruder, highlighting the vulnerable parameter.
+
+![gif](assets/intruder1.gif)
+
+2\. Add a list of Java classes (see included wordlists)
+
+![gif](assets/intruder2.gif)
+
+3\. Add the GadgetProbe payload processor, and any other required processors in your chain (e.g., Base64 encode).
+
+![gif](assets/intruder3.gif)
+
+4\. Run the intruder attack and watch the results come back in the GadgetProbe Burp Tab.
+
+![gif](assets/intruder4.gif)
+
+
+### GadgetProbe Java Library Usage
+
+GadgetProbe can also be used as a Java library or CLI for specialized attacks.
+
+```java
+import com.bishopfox.gadgetprobe.GadgetProbe
+...
+// Call the GadgetProbe constructor with your authoritative nameserver (or use Burp collaborator).
+GadgetProbe gp = new GadgetProbe("dnscallback.burpcollaborator.net");
+// The crafted object "obj" is now ready to be sent using any custom implementation :)
+Object obj = gp.getObject("org.apache.commons.collections.functors.invokertransformer");
+
+```
+
+### Building from Source
+```bash
+# Build JAR (run first)
+./gradlew shadowJar
+
+# Build wordlists
+./generate_wordlists.sh
+```
+
+### How it works
+
+See my [write-up](https://know.bishopfox.com/research/gadgetprobe) on the Bishop Fox blog.
+
+### Author
+
+Twitter: [@BumbleSec](https://twitter.com/theBumbleSec)
+
+GitHub: [the-bumble](https://github.com/the-bumble/)

build.gradle

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+plugins {
+    id 'java'
+    id 'application'
+    id 'com.github.johnrengelman.shadow' version '2.0.4'
+}
+
+mainClassName = 'com.bishopfox.gadgetprobe.GadgetProbe'
+
+group 'com.bishopfox'
+version '1.0-SNAPSHOT'
+
+sourceCompatibility = 1.8
+targetCompatibility = 1.8
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+
+    // Burp Extension
+    compile group: 'org.json', name: 'json', version: '20190722'
+    compile group: 'net.portswigger.burp.extender', name: 'burp-extender-api', version: '2.1'
+
+    // GadgetProbe
+    compile group: 'com.nqzero', name: 'permit-reflect', version: '0.4'
+    compile group: 'org.javassist', name: 'javassist', version: '3.26.0-GA'
+    compile group: 'com.intellij', name: 'forms_rt', version: '7.0.3'
+}

generate_wordlists.sh

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+#!/bin/bash
+set -e
+java -jar build/libs/GadgetProbe-1.0-SNAPSHOT-all.jar > wordlists/gadgetprobe_analyzer_classes.list
+curl "https://raw.githubusercontent.com/FasterXML/jackson-databind/master/src/main/java/com/fasterxml/jackson/databind/jsontype/impl/SubTypeValidator.java" | sed -n -e 's/^\s*s.add("\(.*\)");/\1/p' > wordlists/FasterXML_blacklist.list

gradle/wrapper/gradle-wrapper.properties

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+#Sat Jan 11 00:17:55 EST 2020
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.3-all.zip

gradlew

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+#!/usr/bin/env sh
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"