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01.CTF
2017-12-09) SECCON CTF 2017 - Qualifier
Pwn) Online candy store(400) - Solved by 4 Teams
Online candy store[KR]
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Old Version
30
changes.mady.by.user
Lazenca.0x0
Saved on
Dec 11, 2017
compared with
New Version
31
changes.mady.by.user
Lazenca.0x0
Saved on
Dec 11, 2017
Previous Change: Difference between versions 29 and 30
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다음과 같이 gAccount[] 영역을 할당 받을 수 있습니다.
조금 전에 추가한 사탕을 모두 구매합니다.
공격자는 Order list에 사탕을 추가하고, 주문을 완료합니다.
이때 캔디 설명을 입력 받는 영역으로 gAccount[1].fd영역이 할당됩니다.
이로 인해 plt 영역에 접근하여 값을 변경할 수 있습니다.
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{"serverDuration": 296, "requestCorrelationId": "fa8e0b0a13a3f2df"}