qemu ld_preload support and added socket_fuzzing ld_preload library

Makefile

@@ -274,6 +274,8 @@ code-format:
 	./.custom-format.py -i gcc_plugin/*.c
 	#./.custom-format.py -i gcc_plugin/*.h
 	./.custom-format.py -i gcc_plugin/*.cc
+	./.custom-format.py -i experimental/*/*.c
+	./.custom-format.py -i experimental/*/*.h
 	./.custom-format.py -i qemu_mode/patches/*.h
 	./.custom-format.py -i qemu_mode/libcompcov/*.c
 	./.custom-format.py -i qemu_mode/libcompcov/*.cc
@@ -316,6 +318,7 @@ clean:
 	-$(MAKE) -C gcc_plugin clean
 	$(MAKE) -C libdislocator clean
 	$(MAKE) -C libtokencap clean
+	$(MAKE) -C experimental/socket_fuzzing clean
 	$(MAKE) -C experimental/argv_fuzzing clean
 	$(MAKE) -C qemu_mode/unsigaction clean
 	$(MAKE) -C qemu_mode/libcompcov clean
@@ -327,6 +330,7 @@ distrib: all radamsa
 	-$(MAKE) -C gcc_plugin
 	$(MAKE) -C libdislocator
 	$(MAKE) -C libtokencap
+	$(MAKE) -C experimental/socket_fuzzing
 	$(MAKE) -C experimental/argv_fuzzing
 	cd qemu_mode && sh ./build_qemu_support.sh
 	cd unicorn_mode && sh ./build_unicorn_support.sh
@@ -334,6 +338,7 @@ distrib: all radamsa
 binary-only: all radamsa
 	$(MAKE) -C libdislocator
 	$(MAKE) -C libtokencap
+	$(MAKE) -C experimental/socket_fuzzing
 	$(MAKE) -C experimental/argv_fuzzing
 	cd qemu_mode && sh ./build_qemu_support.sh
 	cd unicorn_mode && sh ./build_unicorn_support.sh
@@ -385,6 +390,7 @@ endif
 	if [ -f libcompcov.so ]; then set -e; install -m 755 libcompcov.so $${DESTDIR}$(HELPER_PATH); fi
 	if [ -f libradamsa.so ]; then set -e; install -m 755 libradamsa.so $${DESTDIR}$(HELPER_PATH); fi
 	if [ -f afl-fuzz-document ]; then set -e; install -m 755 afl-fuzz-document $${DESTDIR}$(BIN_PATH); fi
+	$(MAKE) -C experimental/socket_fuzzing install
 	$(MAKE) -C experimental/argv_fuzzing install
 
 	set -e; ln -sf afl-gcc $${DESTDIR}$(BIN_PATH)/afl-g++

docs/ChangeLog

@@ -17,8 +17,10 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
 Version ++2.59d (develop):
 --------------------------
 
-  - your patch? :-)
-
+  - added ./experimental/argv_fuzzing ld_preload library by Kjell Braden
+  - added preeny's desock_dup ld_preload library as
+    ./experimental/socket_fuzzing for network fuzzing
+  - we now set QEMU_SET_ENV from AFL_PRELOAD when qemu_mode is used
 
 
 --------------------------

experimental/argv_fuzzing/Makefile

@@ -23,12 +23,13 @@ LDFLAGS = -shared -ldl
 all: argvfuzz32.so argvfuzz64.so
 
 argvfuzz32.so: argvfuzz.c
-	$(CC) -m32 $(CFLAGS) $^ $(LDFLAGS) -o $@ || echo "argvfuzz32 build failure (that's fine)"
+	-$(CC) -m32 $(CFLAGS) $^ $(LDFLAGS) -o $@ || echo "argvfuzz32 build failure (that's fine)"
 
 argvfuzz64.so: argvfuzz.c
-	$(CC) $(CFLAGS) $^ $(LDFLAGS) -o $@
+	-$(CC) $(CFLAGS) $^ $(LDFLAGS) -o $@
 
 install: argvfuzz32.so argvfuzz64.so
+	install -d -m 755 $(DESTDIR)$(HELPER_PATH)/
 	if [ -f argvfuzz32.so ]; then set -e; install -m 755 argvfuzz32.so $(DESTDIR)$(HELPER_PATH)/; fi
 	install -m 755 argvfuzz64.so $(DESTDIR)$(HELPER_PATH)/
 

experimental/argv_fuzzing/argv-fuzz-inl.h

@@ -36,12 +36,20 @@
 
 #include <unistd.h>
 
-#define AFL_INIT_ARGV() do { argv = afl_init_argv(&argc); } while (0)
+#define AFL_INIT_ARGV()          \
+  do {                           \
+                                 \
+    argv = afl_init_argv(&argc); \
+                                 \
+  } while (0)
 
-#define AFL_INIT_SET0(_p) do { \
+#define AFL_INIT_SET0(_p)        \
+  do {                           \
+                                 \
     argv = afl_init_argv(&argc); \
     argv[0] = (_p);              \
     if (!argc) argc = 1;         \
+                                 \
   } while (0)
 
 #define MAX_CMDLINE_LEN 100000
@@ -55,7 +63,7 @@ static char** afl_init_argv(int* argc) {
   char* ptr = in_buf;
   int   rc = 0;
 
-  if (read(0, in_buf, MAX_CMDLINE_LEN - 2) < 0);
+  if (read(0, in_buf, MAX_CMDLINE_LEN - 2) < 0) {}
 
   while (*ptr) {
 
@@ -63,7 +71,8 @@ static char** afl_init_argv(int* argc) {
     if (ret[rc][0] == 0x02 && !ret[rc][1]) ret[rc]++;
     rc++;
 
-    while (*ptr) ptr++;
+    while (*ptr)
+      ptr++;
     ptr++;
 
   }
@@ -78,3 +87,4 @@ static char** afl_init_argv(int* argc) {
 #undef MAX_CMDLINE_PAR
 
 #endif                                              /* !_HAVE_ARGV_FUZZ_INL */
+

experimental/persistent_demo/persistent_demo.c

@@ -28,7 +28,6 @@
 #include <signal.h>
 #include <string.h>
 
-
 /* Main entry point. */
 
 int main(int argc, char** argv) {
@@ -64,21 +63,28 @@ int main(int argc, char** argv) {
                We just have some trivial inline code that faults on 'foo!'. */
 
     /* do we have enough data? */
-    if (len < 4)
-      return 0;
+    if (len < 4) return 0;
 
     if (buf[0] == 'f') {
+
       printf("one\n");
       if (buf[1] == 'o') {
+
         printf("two\n");
         if (buf[2] == 'o') {
+
           printf("three\n");
           if (buf[3] == '!') {
+
             printf("four\n");
             abort();
+
           }
+
         }
+
       }
+
     }
 
     /*** END PLACEHOLDER CODE ***/
@@ -92,3 +98,4 @@ int main(int argc, char** argv) {
   return 0;
 
 }
+

experimental/post_library/post_library.so.c

@@ -21,9 +21,9 @@
       in the targeted binary (as shown in ../libpng_no_checksum/). One possible
       exception is the process of fuzzing binary-only software in QEMU mode.
 
-   2) The use of postprocessors for anything other than checksums is questionable
-      and may cause more harm than good. AFL is normally pretty good about
-      dealing with length fields, magic values, etc.
+   2) The use of postprocessors for anything other than checksums is
+   questionable and may cause more harm than good. AFL is normally pretty good
+   about dealing with length fields, magic values, etc.
 
    3) Postprocessors that do anything non-trivial must be extremely robust to
       gracefully handle malformed data and other error conditions - otherwise,
@@ -117,3 +117,4 @@ const unsigned char* afl_postprocess(const unsigned char* in_buf,
   return new_buf;
 
 }
+

experimental/post_library/post_library_png.so.c

@@ -111,3 +111,4 @@ const unsigned char* afl_postprocess(const unsigned char* in_buf,
   return new_buf;
 
 }
+

experimental/socket_fuzzing/Makefile

@@ -0,0 +1,35 @@
+#
+# american fuzzy lop++ - socket_fuzz
+# ----------------------------------
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+
+.PHONY: all install clean
+
+PREFIX     ?= /usr/local
+BIN_PATH    = $(PREFIX)/bin
+HELPER_PATH = $(PREFIX)/lib/afl
+
+CFLAGS = -fPIC -Wall -Wextra
+LDFLAGS = -shared -ldl
+
+all: socketfuzz32.so socketfuzz64.so
+
+socketfuzz32.so: socketfuzz.c
+	-$(CC) -m32 $(CFLAGS) $^ $(LDFLAGS) -o $@ || echo "socketfuzz32 build failure (that's fine)"
+
+socketfuzz64.so: socketfuzz.c
+	-$(CC) $(CFLAGS) $^ $(LDFLAGS) -o $@
+
+install: socketfuzz32.so socketfuzz64.so
+	install -d -m 755 $(DESTDIR)$(HELPER_PATH)/
+	if [ -f socketfuzz32.so ]; then set -e; install -m 755 socketfuzz32.so $(DESTDIR)$(HELPER_PATH)/; fi
+	install -m 755 socketfuzz64.so $(DESTDIR)$(HELPER_PATH)/
+
+clean:
+	rm -f socketfuzz32.so socketfuzz64.so

experimental/socket_fuzzing/README.md

@@ -0,0 +1,11 @@
+# socketfuzz
+
+when you want to fuzz a network service and you can not/do not want to modify
+the source (or just have a binary), then this LD_PRELOAD library will allow
+for sending input to stdin which the target binary will think is coming from
+a network socket.
+
+This is desock_dup.c from the amazing preeny project
+https://github.com/zardus/preeny
+
+It is packaged in afl++ to have it at hand if needed

experimental/socket_fuzzing/socketfuzz.c

@@ -0,0 +1,90 @@
+/*
+ * This is desock_dup.c from the amazing preeny project
+ * https://github.com/zardus/preeny
+ *
+ * It is packaged in afl++ to have it at hand if needed
+ *
+ */
+
+#define _GNU_SOURCE
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/types.h>   //
+#include <sys/socket.h>  //
+#include <sys/stat.h>    //
+#include <fcntl.h>       //
+#include <netinet/in.h>
+#include <pthread.h>
+#include <signal.h>
+#include <dlfcn.h>
+#include <errno.h>
+#include <stdio.h>
+#include <poll.h>
+//#include "logging.h" // switche from preeny_info() to fprintf(stderr, "Info: "
+
+//
+// originals
+//
+int (*original_close)(int);
+int (*original_dup2)(int, int);
+__attribute__((constructor)) void preeny_desock_dup_orig() {
+
+  original_close = dlsym(RTLD_NEXT, "close");
+  original_dup2 = dlsym(RTLD_NEXT, "dup2");
+
+}
+
+int close(int sockfd) {
+
+  if (sockfd <= 2) {
+
+    fprintf(stderr, "Info: Disabling close on %d\n", sockfd);
+    return 0;
+
+  } else {
+
+    return original_close(sockfd);
+
+  }
+
+}
+
+int dup2(int old, int new) {
+
+  if (new <= 2) {
+
+    fprintf(stderr, "Info: Disabling dup from %d to %d\n", old, new);
+    return 0;
+
+  } else {
+
+    return original_dup2(old, new);
+
+  }
+
+}
+
+int accept(int sockfd, struct sockaddr *addr, socklen_t *addrlen) {
+
+  fprintf(stderr, "Info: Emulating accept on %d\n", sockfd);
+  return 0;
+
+}
+
+int bind(int sockfd, const struct sockaddr *addr, socklen_t addrlen) {
+
+  fprintf(stderr, "Info: Emulating bind on port %d\n",
+          ntohs(((struct sockaddr_in *)addr)->sin_port));
+  return 0;
+
+}
+
+int listen(int sockfd, int backlog) {
+
+  return 0;
+
+}
+

src/afl-fuzz-stats.c

@@ -576,10 +576,10 @@ void show_stats(void) {
                 "  imported : " cRST "%-10s" bSTG       bV "\n",
        tmp, sync_id ? DI(queued_imported) : (u8*)"n/a");
 
-  sprintf(tmp, "%s/%s, %s/%s, %s/%s",
-          DI(stage_finds[STAGE_HAVOC]), DI(stage_cycles[STAGE_HAVOC]),
-          DI(stage_finds[STAGE_SPLICE]), DI(stage_cycles[STAGE_SPLICE]),
-          DI(stage_finds[STAGE_RADAMSA]), DI(stage_cycles[STAGE_RADAMSA]));
+  sprintf(tmp, "%s/%s, %s/%s, %s/%s", DI(stage_finds[STAGE_HAVOC]),
+          DI(stage_cycles[STAGE_HAVOC]), DI(stage_finds[STAGE_SPLICE]),
+          DI(stage_cycles[STAGE_SPLICE]), DI(stage_finds[STAGE_RADAMSA]),
+          DI(stage_cycles[STAGE_RADAMSA]));
 
   SAYF(bV bSTOP "   havoc/rad : " cRST "%-36s " bSTG bV bSTOP, tmp);
 
@@ -596,13 +596,12 @@ void show_stats(void) {
                   : cRST),
        tmp);
 
-  sprintf(tmp, "%s/%s, %s/%s",
-          DI(stage_finds[STAGE_PYTHON]), DI(stage_cycles[STAGE_PYTHON]),
-          DI(stage_finds[STAGE_CUSTOM_MUTATOR]),
+  sprintf(tmp, "%s/%s, %s/%s", DI(stage_finds[STAGE_PYTHON]),
+          DI(stage_cycles[STAGE_PYTHON]), DI(stage_finds[STAGE_CUSTOM_MUTATOR]),
           DI(stage_cycles[STAGE_CUSTOM_MUTATOR]));
 
-  SAYF(bV bSTOP "   py/custom : " cRST "%-36s " bSTG bVR bH20 bH2 bH bRB
-                  "\n", tmp);
+  SAYF(bV bSTOP "   py/custom : " cRST "%-36s " bSTG bVR bH20 bH2 bH bRB "\n",
+       tmp);
 
   if (!bytes_trim_out) {
 
@@ -639,13 +638,11 @@ void show_stats(void) {
 
     sprintf(tmp, "%s/%s", DI(stage_finds[STAGE_CUSTOM_MUTATOR]),
             DI(stage_cycles[STAGE_CUSTOM_MUTATOR]));
-    SAYF(bV bSTOP " custom mut. : " cRST "%-36s " bSTG bV RESET_G1,
-         tmp);
+    SAYF(bV bSTOP " custom mut. : " cRST "%-36s " bSTG bV RESET_G1, tmp);
 
   } else {
 
-    SAYF(bV bSTOP "        trim : " cRST "%-36s " bSTG bV RESET_G1,
-         tmp);
+    SAYF(bV bSTOP "        trim : " cRST "%-36s " bSTG bV RESET_G1, tmp);
 
   }
 

src/afl-fuzz.c

@@ -705,13 +705,40 @@ int main(int argc, char** argv) {
   if (dumb_mode == 2 && no_forkserver)
     FATAL("AFL_DUMB_FORKSRV and AFL_NO_FORKSRV are mutually exclusive");
 
+  if (getenv("LD_PRELOAD"))
+    WARNF(
+        "LD_PRELOAD is set, are you sure that is want to you want to do "
+        "instead of using AFL_PRELOAD?");
+
   if (getenv("AFL_PRELOAD")) {
 
+    if (qemu_mode) {
+
+      char* qemu_preload = getenv("QEMU_SET_ENV");
+      char  buf[4096];
+
+      if (qemu_preload) {
+
+        snprintf(buf, sizeof(buf), "%s,LD_PRELOAD=%s", qemu_preload,
+                 getenv("AFL_PRELOAD"));
+
+      } else {
+
+        snprintf(buf, sizeof(buf), "LD_PRELOAD=%s", getenv("AFL_PRELOAD"));
+
+      }
+
+      setenv("QEMU_SET_ENV", buf, 1);
+
+    } else {
+
       setenv("LD_PRELOAD", getenv("AFL_PRELOAD"), 1);
       setenv("DYLD_INSERT_LIBRARIES", getenv("AFL_PRELOAD"), 1);
 
     }
 
+  }
+
   if (getenv("AFL_LD_PRELOAD"))
     FATAL("Use AFL_PRELOAD instead of AFL_LD_PRELOAD");