new file: HeapLAB+Bible.pdf

	new file:   HeapLAB/.glibc/glibc_2.23/ld-2.23.so
	new file:   HeapLAB/.glibc/glibc_2.23/ld.so.2
	new file:   HeapLAB/.glibc/glibc_2.23/libc-2.23.so
	new file:   HeapLAB/.glibc/glibc_2.23/libc.so.6
	new file:   HeapLAB/.glibc/glibc_2.23/libio/genops.c
	new file:   HeapLAB/.glibc/glibc_2.23/malloc/malloc.c
	new file:   HeapLAB/.glibc/glibc_2.23_unsafe-unlink/ld-2.23.so
	new file:   HeapLAB/.glibc/glibc_2.23_unsafe-unlink/ld.so.2
	new file:   HeapLAB/.glibc/glibc_2.23_unsafe-unlink/libc-2.23.so
	new file:   HeapLAB/.glibc/glibc_2.23_unsafe-unlink/libc.so.6
	new file:   HeapLAB/.glibc/glibc_2.23_unsafe-unlink/libio/genops.c
	new file:   HeapLAB/.glibc/glibc_2.23_unsafe-unlink/malloc/malloc.c
	new file:   HeapLAB/.glibc/glibc_2.24/ld-2.24.so
	new file:   HeapLAB/.glibc/glibc_2.24/ld.so.2
	new file:   HeapLAB/.glibc/glibc_2.24/libc-2.24.so
	new file:   HeapLAB/.glibc/glibc_2.24/libc.so.6
	new file:   HeapLAB/.glibc/glibc_2.24/malloc/malloc.c
	new file:   HeapLAB/.glibc/glibc_2.25/ld-2.25.so
	new file:   HeapLAB/.glibc/glibc_2.25/ld.so.2
	new file:   HeapLAB/.glibc/glibc_2.25/libc-2.25.so
	new file:   HeapLAB/.glibc/glibc_2.25/libc.so.6
	new file:   HeapLAB/.glibc/glibc_2.25/malloc/malloc.c
	new file:   HeapLAB/.glibc/glibc_2.26/ld-2.26.so
	new file:   HeapLAB/.glibc/glibc_2.26/ld.so.2
	new file:   HeapLAB/.glibc/glibc_2.26/libc-2.26.so
	new file:   HeapLAB/.glibc/glibc_2.26/libc.so.6
	new file:   HeapLAB/.glibc/glibc_2.26/malloc/malloc.c
	new file:   HeapLAB/.glibc/glibc_2.26_no-tcache/ld-2.26.so
	new file:   HeapLAB/.glibc/glibc_2.26_no-tcache/ld.so.2
	new file:   HeapLAB/.glibc/glibc_2.26_no-tcache/libc-2.26.so
	new file:   HeapLAB/.glibc/glibc_2.26_no-tcache/libc.so.6
	new file:   HeapLAB/.glibc/glibc_2.26_no-tcache/malloc/malloc.c
	new file:   HeapLAB/.glibc/glibc_2.27/ld-2.27.so
	new file:   HeapLAB/.glibc/glibc_2.27/ld.so.2
	new file:   HeapLAB/.glibc/glibc_2.27/libc-2.27.so
	new file:   HeapLAB/.glibc/glibc_2.27/libc.so.6
	new file:   HeapLAB/.glibc/glibc_2.27/malloc/malloc.c
	new file:   HeapLAB/.glibc/glibc_2.27_no-tcache/ld-2.27.so
	new file:   HeapLAB/.glibc/glibc_2.27_no-tcache/ld.so.2
	new file:   HeapLAB/.glibc/glibc_2.27_no-tcache/libc-2.27.so
	new file:   HeapLAB/.glibc/glibc_2.27_no-tcache/libc.so.6
	new file:   HeapLAB/.glibc/glibc_2.27_no-tcache/malloc/malloc.c
	new file:   HeapLAB/.glibc/glibc_2.27_ubuntu1804/.debug/ld-2.27.so
	new file:   HeapLAB/.glibc/glibc_2.27_ubuntu1804/.debug/libc-2.27.so
	new file:   HeapLAB/.glibc/glibc_2.27_ubuntu1804/ld-2.27.so
	new file:   HeapLAB/.glibc/glibc_2.27_ubuntu1804/ld.so.2
	new file:   HeapLAB/.glibc/glibc_2.27_ubuntu1804/libc-2.27.so
	new file:   HeapLAB/.glibc/glibc_2.27_ubuntu1804/libc.so.6
	new file:   HeapLAB/.glibc/glibc_2.28/ld-2.28.so
	new file:   HeapLAB/.glibc/glibc_2.28/ld.so.2
	new file:   HeapLAB/.glibc/glibc_2.28/libc-2.28.so
	new file:   HeapLAB/.glibc/glibc_2.28/libc.so.6
	new file:   HeapLAB/.glibc/glibc_2.28/malloc/malloc.c
	new file:   HeapLAB/.glibc/glibc_2.28_no-tcache/ld-2.28.so
	new file:   HeapLAB/.glibc/glibc_2.28_no-tcache/ld.so.2
	new file:   HeapLAB/.glibc/glibc_2.28_no-tcache/libc-2.28.so
	new file:   HeapLAB/.glibc/glibc_2.28_no-tcache/libc.so.6
	new file:   HeapLAB/.glibc/glibc_2.28_no-tcache/malloc/malloc.c
	new file:   HeapLAB/.glibc/glibc_2.29/ld-2.29.so
	new file:   HeapLAB/.glibc/glibc_2.29/ld.so.2
	new file:   HeapLAB/.glibc/glibc_2.29/libc-2.29.so
	new file:   HeapLAB/.glibc/glibc_2.29/libc.so.6
	new file:   HeapLAB/.glibc/glibc_2.29/malloc/malloc.c
	new file:   HeapLAB/.glibc/glibc_2.29_no-tcache/ld-2.29.so
	new file:   HeapLAB/.glibc/glibc_2.29_no-tcache/ld.so.2
	new file:   HeapLAB/.glibc/glibc_2.29_no-tcache/libc-2.29.so
	new file:   HeapLAB/.glibc/glibc_2.29_no-tcache/libc.so.6
	new file:   HeapLAB/.glibc/glibc_2.29_no-tcache/malloc/malloc.c
	new file:   HeapLAB/.glibc/glibc_2.29_ubuntu1904/.debug/ld-2.29.so
	new file:   HeapLAB/.glibc/glibc_2.29_ubuntu1904/.debug/libc-2.29.so
	new file:   HeapLAB/.glibc/glibc_2.29_ubuntu1904/ld-2.29.so
	new file:   HeapLAB/.glibc/glibc_2.29_ubuntu1904/ld.so.2
	new file:   HeapLAB/.glibc/glibc_2.29_ubuntu1904/libc-2.29.so
	new file:   HeapLAB/.glibc/glibc_2.29_ubuntu1904/libc.so.6
	new file:   HeapLAB/.glibc/glibc_2.30/ld-2.30.so
	new file:   HeapLAB/.glibc/glibc_2.30/ld.so.2
	new file:   HeapLAB/.glibc/glibc_2.30/libc-2.30.so
	new file:   HeapLAB/.glibc/glibc_2.30/libc.so.6
	new file:   HeapLAB/.glibc/glibc_2.30/malloc/malloc.c
	new file:   HeapLAB/.glibc/glibc_2.30_no-tcache/ld-2.30.so
	new file:   HeapLAB/.glibc/glibc_2.30_no-tcache/ld.so.2
	new file:   HeapLAB/.glibc/glibc_2.30_no-tcache/libc-2.30.so
	new file:   HeapLAB/.glibc/glibc_2.30_no-tcache/libc.so.6
	new file:   HeapLAB/.glibc/glibc_2.30_no-tcache/malloc/malloc.c
	new file:   HeapLAB/.glibc/glibc_2.31/ld-2.31.so
	new file:   HeapLAB/.glibc/glibc_2.31/ld.so.2
	new file:   HeapLAB/.glibc/glibc_2.31/libc-2.31.so
	new file:   HeapLAB/.glibc/glibc_2.31/libc.so.6
	new file:   HeapLAB/.glibc/glibc_2.31/malloc/malloc.c
	new file:   HeapLAB/.glibc/glibc_2.31_no-tcache/ld-2.31.so
	new file:   HeapLAB/.glibc/glibc_2.31_no-tcache/ld.so.2
	new file:   HeapLAB/.glibc/glibc_2.31_no-tcache/libc-2.31.so
	new file:   HeapLAB/.glibc/glibc_2.31_no-tcache/libc.so.6
	new file:   HeapLAB/.glibc/glibc_2.31_no-tcache/malloc/malloc.c
	new file:   HeapLAB/.src/demo_fastbins.c
	new file:   HeapLAB/.src/demo_top_chunk.c
	new file:   HeapLAB/.src/demo_unsortedbin.c
	new file:   HeapLAB/HeapLab - GLIBC Heap Exploitation.pdf
	new file:   HeapLAB/challenge-fastbin_dup/.gdb_history
	new file:   HeapLAB/challenge-fastbin_dup/bruh.py
	new file:   HeapLAB/challenge-fastbin_dup/fastbin_dup_2
	new file:   HeapLAB/challenge-fastbin_dup/pwntools_template.py
	new file:   HeapLAB/challenge-one_byte/one_byte
	new file:   HeapLAB/challenge-one_byte/pwntools_template.py
	new file:   HeapLAB/fastbin_dup/demo
	new file:   HeapLAB/fastbin_dup/fastbin_dup
	new file:   HeapLAB/fastbin_dup/pwntools_template.py
	new file:   HeapLAB/house_of_force/demo
	new file:   HeapLAB/house_of_force/house_of_force
	new file:   HeapLAB/house_of_force/pwntools_template.py
	new file:   HeapLAB/house_of_orange/house_of_orange
	new file:   HeapLAB/house_of_orange/pwntools_template.py
	new file:   HeapLAB/malloc_testbed/.links/ld.so.2
	new file:   HeapLAB/malloc_testbed/.links/libc.so.6
	new file:   HeapLAB/malloc_testbed/change_glibc_version.py
	new file:   HeapLAB/malloc_testbed/malloc_testbed
	new file:   HeapLAB/malloc_testbed/pwntools_template.py
	new file:   HeapLAB/safe_unlink/pwntools_template.py
	new file:   HeapLAB/safe_unlink/safe_unlink
	new file:   HeapLAB/unsafe_unlink/demo
	new file:   HeapLAB/unsafe_unlink/pwntools_template.py
	new file:   HeapLAB/unsafe_unlink/unsafe_unlink
	new file:   original.gz

2 files changed, 70 insertions, 0 deletions

diff --git a/HeapLAB/safe_unlink/pwntools_template.py b/HeapLAB/safe_unlink/pwntools_template.py
new file mode 100755
index 0000000..ff1c1b2
--- /dev/null
+++ b/HeapLAB/safe_unlink/pwntools_template.py
@@ -0,0 +1,70 @@
+#!/usr/bin/python3
+from pwn import *
+
+elf = context.binary = ELF("safe_unlink")
+libc = elf.libc
+
+gs = '''
+continue
+'''
+def start():
+    if args.GDB:
+        return gdb.debug(elf.path, gdbscript=gs)
+    else:
+        return process(elf.path)
+
+# Index of allocated chunks.
+index = 0
+
+# Select the "malloc" option; send size.
+# Returns chunk index.
+def malloc(size):
+    global index
+    io.send("1")
+    io.sendafter("size: ", f"{size}")
+    io.recvuntil("> ")
+    index += 1
+    return index - 1
+
+# Select the "edit" option; send index & data.
+def edit(index, data):
+    io.send("2")
+    io.sendafter("index: ", f"{index}")
+    io.sendafter("data: ", data)
+    io.recvuntil("> ")
+
+# Select the "free" option; send index.
+def free(index):
+    io.send("3")
+    io.sendafter("index: ", f"{index}")
+    io.recvuntil("> ")
+
+io = start()
+
+# This binary leaks the address of puts(), use it to resolve the libc load address.
+io.recvuntil("puts() @ ")
+libc.address = int(io.recvline(), 16) - libc.sym.puts
+io.recvuntil("> ")
+io.timeout = 0.1
+
+# =============================================================================
+
+# =-=-=- EXAMPLE -=-=-=
+
+# Print the address of m_array, where the program stores pointers to its allocated chunks.
+log.info(f"m_array @ 0x{elf.sym.m_array:02x}")
+
+# Request 2 small chunks.
+chunk_A = malloc(0x88)
+chunk_B = malloc(0x88)
+
+# Prepare fake chunk metadata.
+fd = 0xdeadbeef
+bk = 0xcafebabe
+prev_size = 0x90
+fake_size = 0x90
+edit(chunk_A, p64(fd) + p64(bk) + p8(0)*0x70 + p64(prev_size) + p64(fake_size))
+
+# =============================================================================
+
+io.interactive()
diff --git a/HeapLAB/safe_unlink/safe_unlink b/HeapLAB/safe_unlink/safe_unlink
new file mode 100755
index 0000000..83b07b1
--- /dev/null
+++ b/HeapLAB/safe_unlink/safe_unlink