CodeJitsu targetted TECHx running YAN01_00015 in round 70.

---

Type 1 POV

eip:0x6fc25f21 - esp:0x58b8ab7b

---

Execution control corruption via return (return to: 0xbaaaaff8).

Tracing data from eip: 0x8048ba9 tracing source of memory: 0xbaaaaff8 (value: 0xbaaaaf6c)

0x804939a : receive syscall (return)
0x804909b : mov bl,byte ptr [esi+ecx]
0x804909e : mov byte ptr [ebp-0x29],bl
0x80490a1 : mov bl,byte ptr [ebp-0x29]
0x80490aa : mov byte ptr [edx+ecx],bl
0x8048ba9: ret // address: 0xbaaaaff8 value: 0xbaaaaf6c

---

Execution of memory occurred that was not part of the initial text sections or an executably allocated page.

Tracing data from eip: 0xbaaaaf6c tracing source of memory: 0xbaaaaf6c (value: 0xb8ab7bbc)

0x804939a : receive syscall (return)
0x804909b : mov bl,byte ptr [esi+ecx]
0x804909e : mov byte ptr [ebp-0x29],bl
0x80490a1 : mov bl,byte ptr [ebp-0x29]
0x80490aa : mov byte ptr [edx+ecx],bl
0xbaaaaf6c: mov esp,0x58b8ab7b // address: 0xbaaaaf6c value: 0xb8ab7bbc

---

Negotiated general register: esp:0x58b8ab7b

Tracing data from eip: 0xbaaaaf76 tracing source of register: esp (value: 0x58b8ab7b)

0xbaaaaf6c : mov esp,0x58b8ab7b
0xbaaaaf76: jmp ebx // address: esp value: 0x58b8ab7b