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: 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: 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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 --- HeapLAB/safe_unlink/pwntools_template.py | 70 +++++++++++++++++++++++++++++++ HeapLAB/safe_unlink/safe_unlink | Bin 0 -> 15936 bytes 2 files changed, 70 insertions(+) create mode 100755 HeapLAB/safe_unlink/pwntools_template.py create mode 100755 HeapLAB/safe_unlink/safe_unlink (limited to 'HeapLAB/safe_unlink') 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 Binary files /dev/null and b/HeapLAB/safe_unlink/safe_unlink differ -- 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