CodeJitsu targetted Shellphish running CROMU_00065 in round 91.

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Type 1 POV

eip:0x7892ee4d - ebx:0xe90b3718

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Execution control corruption via call.

Tracing data from eip: 0x80496a3 tracing source of register: edx (value: 0xbaaaae6b)

0x804d401 : receive syscall (return)
0x804a342 : mov al,byte ptr [ebp-0x21]
0x804a34b : mov byte ptr [edx+ecx],al
0x8049690 : mov edx,dword ptr [ecx+eax+0xc]
0x80496a3: call edx // address: edx value: 0xbaaaae6b

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

Tracing data from eip: 0xbaaaae6b tracing source of memory: 0xbaaaae6b (value: 0xb3718bb)

0x804d401 : receive syscall (return)
0x804a342 : mov al,byte ptr [ebp-0x21]
0x804a34b : mov byte ptr [edx+ecx],al
0xbaaaae6b: mov ebx,0xe90b3718 // address: 0xbaaaae6b value: 0xb3718bb

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Negotiated general register: ebx:0xe90b3718

Tracing data from eip: 0xbaaaae75 tracing source of register: ebx (value: 0xe90b3718)

0xbaaaae6b : mov ebx,0xe90b3718
0xbaaaae75: jmp eax // address: ebx value: 0xe90b3718