ForAllSecure targetted TECHx running CROMU_00073 in round 23.

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Type 1 POV

eip:0xdc15f652 - ebp:0x5cd5320a

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Execution control corruption via return (return to: 0xbaaaaf28).

Tracing data from eip: 0x80482c6 tracing source of memory: 0xbaaaaf28 (value: 0xbaaaaef3)

0x805027d : receive syscall (return)
0x80483b7 : mov dl,byte ptr [ecx+eax]
0x80483c7 : mov byte ptr [ecx+eax],dl
0x80482c6: ret // address: 0xbaaaaf28 value: 0xbaaaaef3

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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: 0xbaaaaef3 tracing source of memory: 0xbaaaaef3 (value: 0xc3f4628b)

0x805027d : receive syscall (return)
0x80483a3 : mov dl,byte ptr [ecx+eax]
0x80483ad : mov byte ptr [ecx+eax],dl
0xbaaaaef3: mov esp,dword ptr [edx-0xc] // address: 0xbaaaaef3 value: 0xc3f4628b

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Negotiated general register: ebp:0x5cd5320a

Tracing data from eip: 0x8048ed4 tracing source of register: ebp (value: 0x5cd5320a)

0x805027d : receive syscall (return)
0x80483a3 : mov dl,byte ptr [ecx+eax]
0x80483ad : mov byte ptr [ecx+eax],dl
0x8048ed3 : pop ebp
0x8048ed4: ret // address: ebp value: 0x5cd5320a