Disekt targetted TECHx running YAN01_00015 in round 67.

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Type 2 POV

Reading from protected address: 0x4347c001

0xbaaaaf7e : mov edi,dword ptr [0x4347c001]

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The application exited with a segmentation fault

0: 0 // esp: 0

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

Tracing data from eip: 0x8048ba9 tracing source of memory: 0xbaaaaff8 (value: 0xbaaaaf73)

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: 0xbaaaaf73

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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: 0xbaaaaf73 tracing source of memory: 0xbaaaaf73 (value: 0x3199c031)

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
0xbaaaaf73: xor eax,eax // address: 0xbaaaaf73 value: 0x3199c031