CodeJitsu targetted Shellphish running YAN01_00016 in round 85.

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Type 1 POV

eip:0x6a8a264e - ebx:0x268aa6e4

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

Tracing data from eip: 0x8048e4c tracing source of memory: 0xbaaaaff8 (value: 0xbaaaafb1)

0x804956a : receive syscall (return)
0x804926b : mov bl,byte ptr [esi+ecx]
0x804926e : mov byte ptr [ebp-0x29],bl
0x8049271 : mov bl,byte ptr [ebp-0x29]
0x804927a : mov byte ptr [edx+ecx],bl
0x8048e4c: ret // address: 0xbaaaaff8 value: 0xbaaaafb1

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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: 0xbaaaafb1 tracing source of memory: 0xbaaaafb1 (value: 0x8aa6e4bb)

0x804956a : receive syscall (return)
0x804926b : mov bl,byte ptr [esi+ecx]
0x804926e : mov byte ptr [ebp-0x29],bl
0x8049271 : mov bl,byte ptr [ebp-0x29]
0x804927a : mov byte ptr [edx+ecx],bl
0xbaaaafb1: mov ebx,0x268aa6e4 // address: 0xbaaaafb1 value: 0x8aa6e4bb

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Negotiated general register: ebx:0x268aa6e4

Tracing data from eip: 0xbaaaafbb tracing source of register: ebx (value: 0x268aa6e4)

0xbaaaafb1 : mov ebx,0x268aa6e4
0xbaaaafbb: jmp eax // address: ebx value: 0x268aa6e4