Protostar

Protostar stack7

AboutStack6introducesreturnto.texttogaincodeexecution.Themetasploittool"msfelfscan"canmakesearchingforsuitableinstructionsveryeasy,otherwiselookingthroughobjdumpoutputwillsuffice.Thislevelisat/opt/pro
terrying·2013-04-17 11:14

Protostar stack7

AboutStack6introducesreturnto.texttogaincodeexecution.Themetasploittool"msfelfscan"canmakesearchingforsuitableinstructionsveryeasy,otherwiselookingthroughobjdumpoutputwillsuffice.Thislevelisat/opt/pro
terrying·2013-04-17 11:14

Protostar stack6

AboutStack6looksatwhathappenswhenyouhaverestrictionsonthereturnaddress.Thislevelcanbedoneinacoupleofways,suchasfindingtheduplicateofthepayload(objdump-swillhelpwiththis),orret2libc,orevenreturnorienta
terrying·2013-04-16 15:14

Protostar stack6

AboutStack6looksatwhathappenswhenyouhaverestrictionsonthereturnaddress.Thislevelcanbedoneinacoupleofways,suchasfindingtheduplicateofthepayload( objdump-s willhelpwiththis),or ret2libc ,orevenreturnori
terrying·2013-04-16 15:14

Protostar stack5

AboutStack5isastandardbufferoverflow,thistimeintroducingshellcode.Hints:Atthispointintime,itmightbeeasiertousesomeoneelsesshellcodeIfdebuggingtheshellcode,use\xcc(int3)tostoptheprogramexecutingandretu
terrying·2013-04-14 02:56

Protostar stack5

AboutStack5isastandardbufferoverflow,thistimeintroducingshellcode.Hints:Atthispointintime,itmightbeeasiertousesomeoneelsesshellcodeIfdebuggingtheshellcode,use\xcc(int3)tostoptheprogramexecutingandretu
terrying·2013-04-14 02:56

Protostar stack4

AboutStack4takesalookatoverwritingsavedEIPandstandardbufferoverflows.Hints:Avarietyofintroductorypapersintobufferoverflowsmayhelp.gdbletsyoudo"run#include#include#includevoidwin(){printf("codeflowsucc
terrying·2013-04-14 02:16

Protostar stack4

AboutStack4takesalookatoverwritingsavedEIPandstandardbufferoverflows.Hints:Avarietyofintroductorypapersintobufferoverflowsmayhelp.gdbletsyoudo"run#include#include#includevoidwin(){    printf("codeflow
terrying·2013-04-14 02:16

Protostar stack3

AboutStack3looksatenvironmentvariables,andhowtheycanbeset,andoverwritingfunctionpointersstoredonthestack(asapreludetooverwritingthesavedEIP)Hints:bothgdbandobjdumpisyourfriendyoudeterminingwherethewin
terrying·2013-04-14 01:12

Protostar stack3

AboutStack3looksatenvironmentvariables,andhowtheycanbeset,andoverwritingfunctionpointersstoredonthestack(asapreludetooverwritingthesavedEIP)Hints:bothgdbandobjdumpisyourfriendyoudeterminingwherethewin
terrying·2013-04-14 01:12

Protostar stack1

AboutThislevellooksattheconceptofmodifyingvariablestospecificvaluesintheprogram,andhowthevariablesarelaidoutinmemory.Hints:Ifyouareunfamiliarwiththehexadecimalbeingdisplayed,"manascii"isyourfriend.Pro
terrying·2013-04-14 01:28

Protostar stack2

AboutStack2looksatenvironmentvariables,andhowtheycanbeset.Thislevelisat/opt/protostar/bin/stack2Sourcecode
terrying·2013-04-14 01:15

Protostar stack0

AboutThislevelintroducestheconceptthatmemorycanbeaccessedoutsideofitsallocatedregion,howthestackvariablesarelaidout,andthatmodifyingoutsideoftheallocatedmemorycanmodifyprogramexecution.Thislevelisat/o
terrying·2013-04-11 23:25
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