From ba02c1bd6981675aaf5a0b6cddb7457e53d5eed1 Mon Sep 17 00:00:00 2001 From: Brett Weiland Date: Mon, 4 Jan 2021 16:32:01 -0600 Subject: 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: 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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 --- HeapLAB/fastbin_dup/demo | Bin 0 -> 10776 bytes HeapLAB/fastbin_dup/fastbin_dup | Bin 0 -> 15856 bytes HeapLAB/fastbin_dup/pwntools_template.py | 62 +++++++++++++++++++++++++++++++ 3 files changed, 62 insertions(+) create mode 100755 HeapLAB/fastbin_dup/demo create mode 100755 HeapLAB/fastbin_dup/fastbin_dup create mode 100755 HeapLAB/fastbin_dup/pwntools_template.py (limited to 'HeapLAB/fastbin_dup') diff --git a/HeapLAB/fastbin_dup/demo b/HeapLAB/fastbin_dup/demo new file mode 100755 index 0000000..93847ad Binary files /dev/null and b/HeapLAB/fastbin_dup/demo differ diff --git a/HeapLAB/fastbin_dup/fastbin_dup b/HeapLAB/fastbin_dup/fastbin_dup new file mode 100755 index 0000000..7332ab1 Binary files /dev/null and b/HeapLAB/fastbin_dup/fastbin_dup differ diff --git a/HeapLAB/fastbin_dup/pwntools_template.py b/HeapLAB/fastbin_dup/pwntools_template.py new file mode 100755 index 0000000..294ab15 --- /dev/null +++ b/HeapLAB/fastbin_dup/pwntools_template.py @@ -0,0 +1,62 @@ +#!/usr/bin/python3 +from pwn import * + +elf = context.binary = ELF("fastbin_dup") +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 & data. +# Returns chunk index. +def malloc(size, data): + global index + io.send("1") + io.sendafter("size: ", f"{size}") + io.sendafter("data: ", data) + io.recvuntil("> ") + index += 1 + return index - 1 + +# Select the "free" option; send index. +def free(index): + io.send("2") + 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.timeout = 0.1 + +# ============================================================================= + +# =-=-=- EXAMPLE -=-=-= + +# Set the username field. +username = "George" +io.sendafter("username: ", username) +io.recvuntil("> ") + +# Request two 0x30-sized chunks and fill them with data. +chunk_A = malloc(0x28, "A"*0x28) +chunk_B = malloc(0x28, "B"*0x28) + +# Free the first chunk, then the second. +free(chunk_A) +free(chunk_B) + +# ============================================================================= + +io.interactive() -- 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