"Gimme a bit!" - Exploring Attacks in the "Post-XSS" World

(JNNFBCJU
&YQMPSJOH"UUBDLTJOUIF1PTU9448PSME
5BLBTIJ:POFVDIJ [email protected]

%FQBSUNFOUPG*OGPSNBUJPO4DJFODF 'BDVMUZPG4DJFODF UIF6OJWFSTJUZPG5PLZP
IUUQTTIJGUKTJOGP

View Slide

TIJGUKTJOGP
(JNNFCJU BUMFBTU&YQMPSJOH5FDIOJRVFTPOCJU-FBLBHFJOUIF8FC
5BLBTIJ:POFVDIJ
‣ [email protected] !ZOVDIZ
‣ %FQBSUNFOUPG*OGPSNBUJPO4DJFODF 'BDVMUZ
PG4DJFODF UIF6OJWFSTJUZPG5PLZP
‣ *ὑ8FC
‣ 4&$$0/#FHJOOFSTDUGC
‣ 4FDVSJUZ$BNQTFDDBNQ
‣ 54(EPEPEPEP
‣ 4FFIUUQTTIJGUKTJOGP

View Slide

TIJGUKTJOGP
0VUMJOF

‣ 1PTU9448PSME
‣ 2VFTUJPO8IBUDPNFTBGUFS944
‣ *OUSPEVDUJPOUP94-FBLTBOE944FBSDI
‣ 0WFSWJFX
‣ &YBNQMFT
‣ 'SBNF$PVOU
‣ 5JNJOH*OGPSNBUJPO
‣ &⒎FDUT.JUJHBUJPO
‣ $PODMVTJPO

View Slide

1PTU9448PSME

View Slide

TIJGUKTJOGP

944
3PBENBQUP1PTU9448PSME
.JUJHBUJPO
944FBSDI
94-FBL
4DSJQUMFTT 
"UUBDL
4DSJQU 
(BEHFUT

View Slide

TIJGUKTJOGP
$SPTT4JUF4DSJQUJOH 
944 BDPNNPOqBXJO8FCBQQMJDBUJPOT

‣ .BOZEFWFMPQFSTBOESFTFBSDIFSTIBWFTUSVHHMFEXJUI944
‣ .PEFSO8FCGSBNFXPSLTQSPWJEFQSFWFOUJPO
‣ "VUPNBUJDFTDBQJOH
‣ 'PPMQSPPG FHEBOHFSPVTMZ4FU*OOFS)5.-

‣ 8FCCSPXTFSTBMTPIBWFEFGFOTFMJOFT
‣ $POUFOU4FDVSJUZ1PMJDZ $41

‣ 944"VEJUPS
= $_GET['q'] ?>

View Slide

TIJGUKTJOGP

944
.JUJHBUJPO
944FBSDI
94-FBL
4DSJQUMFTT 
"UUBDL
4DSJQU 
(BEHFUT

View Slide

TIJGUKTJOGP
$POUFOU4FDVSJUZ1PMJDZ 
&YBNQMFTPG$MJFOUTJEF.JUJHBUJPOPG944
‣ $POUFOU4FDVSJUZ1PMJDZ $41

‣ 4QFDJpDBUJPOIUUQTXXXXPSH53$41JOUSP
‣ *USFEVDFTUIFIBSNDBVTFECZDPOUFOUJOKFDUJPOBUUBDLT
‣ "QQSPQSJBUFQPMJDJFTSFRVJSFBUUBDLFSTUPNBLFBCVODIPG
F⒎PSUTUPFYFDVUF+4TVDDFTTGVMMZ

Content-Security-Policy: script-src 'nonce-4g34...34r'
alert('Hello, CSP!')

View Slide

TIJGUKTJOGP
944"VEJUPS 
&YBNQMFTPG$MJFOUTJEF.JUJHBUJPOPG944
‣ 99441SPUFDUJPOIFBEFS
EFpOFTUIFBDUJPOXIFO
3FqFDUFE
944JTGPVOE
‣ 5IFSFBSFUXPNPEFT
‣ pMUFS
‣ CMPDL
‣ 3FTFBSDIFSTIBWFUBDLMFEXJUI
CZQBTTJOHPG944"VEJUPS

View Slide

TIJGUKTJOGP

944
.JUJHBUJPO
944FBSDI
94-FBL
4DSJQUMFTT 
"UUBDL
4DSJQU 
(BEHFUT

View Slide

TIJGUKTJOGP
&WPMVUJPOPG944 
4DSJQU(BEHFUT$PEFSFVTJOHTJNJMBSUP301
‣ &OUIVTJBTUTPG944IBWFUSJFEUPCZQBTT$41
‣ 0OFPG4PMVUJPOT4DSJQU(BEHFUT -FLJFTFUBM

‣ *EFBSFVTFUSVTUFE MFHJUJNBUF
TPVSDFDPEFTUPFYFDVUF
BSCJUSBSZTDSJQUT DGSFUVSOPSJFOUFEQSPHSBNNJOH 301

View Slide

TIJGUKTJOGP
4DSJQUMFTT"UUBDLT 
/PUPOMZ+4 CVUBMTP$44IFMQTBUUBDLFST

‣ 3FTFBSDI2VFTUJPO 
*G+4FYFDVUJPOJTSFTUSJDUFE XIBUDBOBUUBDLFSTEP
‣ 0OFPG"OTXFST4DSJQUMFTT"UUBDLT )FJEFSJDIFUBM

‣ #BDLJOIJTUPSZ UIJTDMBTTPGBUUBDLTIBTCFFOJOWFTUJHBUFECZ
SFTFBSDIFST BOEXBTPGUFOSFEJTDPWFSFE
‣ 8FMMLOPXO"UUSJCVUFSFBEJOH 'POUMJHBUVSFUFDIOJRVF GPOU
SBOHFUFDIOJRVF FUD
‣ /FXSFTFBSDIMJOFJNQPSUSFDVSTJPOUFDIOJRVFT 1FQF7JMB

IUUQTWX[[email protected]@[email protected]

View Slide

TIJGUKTJOGP
94-FBLT944FBSDI 
"UUBDLTBJNJOHUIFQPTU944XPSME
*TUIFSFZFUBOPUIFSBUUBDLJOHUFDIOJRVFXIFOBEWFSTBSJFT
IBWFOPDPOUFOUJOKFDUJPOWVMOFSBCJMJUJFTJOUBSHFUT
‣ "OTXFS:FT
‣ *EFBEBUBUPXIJDIDSPTTPSJHJOBDDFTTJTHSBOUFEIFMQTPOF
FTUJNBUFUIFGFBUVSFT DIBSBDUFSJTUJDT
PGB)551SFTQPOTF
‣ &YBNQMF FYQMBJOFEMBUFS

‣ $SPTTTJUF-FBLT 94-FBLT

‣ $SPTTTJUF4FBSDI 944FBSDI

View Slide

TIJGUKTJOGP
#"%/0/$& 
54($5' "EEJUJPOBM/PUFT

session_start();
$nonce = md5(session_id());
$_SESSION['count'] = isset($_SESSION['count']) ?
$_SESSION['count'] + 1 : 0;
if ($_SESSION['count'] > 3){
setcookie('flag', null, -1, '/');
}
?>
content="script-src 'nonce-= $nonce ?>';">
>/* ... */
= $_GET['q'] ?>

UIFOPODFJTpYFE
:PVIBWFUPMFBLDPPLJFT
XJUIPOMZUXPSFR

View Slide

TIJGUKTJOGP
/PUFT 
1PTU9448PSME
‣ *O .JDIBFM;BMFXTLJ !MDBNUVG
OPUFEUIBUUIF
DPMMFDUJPOPGBUUBDLTBMUFSOBUJWFUP944IFQSPWJEFEIBWF
BMNPTUTBNFDBQBCJMJUJFTBT944 
1PTUDBSETGSPNUIFQPTU944XPSMEIUUQMDBNUVGDPSFEVNQDYQPTUYTT

‣ FH3FSPVUJOHPGFYJTUJOHGPSNT
‣ FHIJKBDLSFMBUJWF63-TXJUICBTF
‣ DG3FMBUJWF1BUI0WFSXSJUF
‣ 4FF"STIBE GPSUIFSFBMBOBMZTJT-BSHFTDBMFBOBMZTJTPG
TUZMFJOKFDUJPOCZSFMBUJWFQBUIPWFSXSJUF 
IUUQTEMBDNPSHDJUBUJPODGN JE

View Slide

*OUSPEVDUJPOUP 
94-FBLTBOE944FBSDI

View Slide

TIJGUKTJOGP
$SPTTTJUF-FBLT 
BLB94-FBLT
‣ $SPTTTJUFMFBLT 94-FBL
BSFBGBNJMZPGCSPXTFSTJEF
DIBOOFMUFDIOJRVFT
‣ 94-FBLBUUBDLTBJNUPDJSDVNWFOUTFDVSJUZDPOUSPMTJO8FC
CSPXTFSTCZUXPTUFQT
‣ 3FRVFTUJOH
‣ FHFNCFEEJOHBDSPTTTJUFDPOUFOU FHJGSBNF

‣ 0CTFSWJOHCSPXTFSTJEFDIBOOFMT
‣ FHBCVTJOHGFBUVSFTPG8FCCSPXTFST FH944"VEJUPS

‣ 0OFPGUIFVTBHFT$SPTTTJUF4FBSDI 944FBSDI

View Slide

TIJGUKTJOGP
$SPTTTJUF4FBSDI 
BLB944FBSDI

‣ $SPTTTJUFTFBSDI 944FBSDI
BUUBDLJTBLJOEPGBUUBDLT
XIJDIBTLTTPNFRVFTUJPOTWJDUJNGSPNBVTFSTCSPXTFSUP
B8FCFOEQPJOU
‣ FH*TUIFSFBFNBJMXIJDIDPOUBJOTUIFXPSEBQQMFJOUIF
CPEZ GPSBOFNBJMTFSWJDF
‣ FH*OUIFSFBQMBOUPHPTPNFXIFSFUIJTXFFLFOE GPSB
DBMFOEBSTFSWJDF
‣ 5IFBOTXFSPGUIFTFSWFSXJMMCFPCUBJOFECZVTJOH94
-FBLT FHSFTQPOTFTJ[FFTUJNBUJPO FUD

View Slide

TIJGUKTJOGP
0VUMJOF944FBSDI
/05&)FSFJTTBNFOPUBUJPOBT(FMFSOUFS VTFE

%VNNZ3FRVFTU
3FTQPOTF
$IBMMFOHF3FRVFTU
3FTQPOTF
7JDUJN
4FSWJDF
7JDUJN
6TFS
"UUBDLFS
*OJUJBUF
$PMMFDU 
3FTVMUT

View Slide

TIJGUKTJOGP
0VUMJOF944FBSDI

%VNNZ3FRVFTU
3FTQPOTF
$IBMMFOHF3FRVFTU
3FTQPOTF
7JDUJN
4FSWJDF
7JDUJN
6TFS
"UUBDLFS
*OJUJBUF
$PMMFDU 
3FTVMUT
"OBUUBDLFSMVSFTBVTFSUPB
QBHFUIBUJOJUJBUFTSFRVFTUT
UPBTFSWJDF

View Slide

TIJGUKTJOGP
0VUMJOF944FBSDI

%VNNZ3FRVFTU
3FTQPOTF
$IBMMFOHF3FRVFTU
3FTQPOTF
7JDUJN
4FSWJDF
7JDUJN
6TFS
"UUBDLFS
*OJUJBUF
$PMMFDU 
3FTVMUT
/FYU "OBEWFSTBSZJOJUJBUFT
EVNNZSFRVFTUTXIPTF
SFTQPOTFTBSFLOPXOJOBEWBODF
&YBNQMFBSFRVFTUXJUIBTFBSDI
RVFSZXIPTFSFTVMUDBOOPUFYJTU

View Slide

TIJGUKTJOGP
0VUMJOF944FBSDI

%VNNZ3FRVFTU
3FTQPOTF
$IBMMFOHF3FRVFTU
3FTQPOTF
7JDUJN
4FSWJDF
7JDUJN
6TFS
"UUBDLFS
*OJUJBUF
$PMMFDU 
3FTVMUT
"GUFSSFRVFTUJOHEVNNJFT
BOBEWFSTBSZTUBSUTUP
JOJUJBUFSFRVFTUTXJUI
BDUVBMTFBSDIRVFSJFT
%J⒎CFUXFFOEBUB
FYQPTFECZ94-FBLGPS
EVNNJFTBOEPOFGPS
DIBMMFOHFTDPSSFTQPOETUIF
EJ⒎CFUXFFOSFTQPOTFT

View Slide

TIJGUKTJOGP
0VUMJOF944FBSDI

%VNNZ3FRVFTU
3FTQPOTF
$IBMMFOHF3FRVFTU
3FTQPOTF
7JDUJN
4FSWJDF
7JDUJN
6TFS
"UUBDLFS
*OJUJBUF
$PMMFDU 
3FTVMUT
"OBEWFSTBSZSFQFBUTUIF
QSPDFTTBOE

View Slide

TIJGUKTJOGP
0VUMJOF944FBSDI

%VNNZ3FRVFTU
3FTQPOTF
$IBMMFOHF3FRVFTU
3FTQPOTF
7JDUJN
4FSWJDF
7JDUJN
6TFS
"UUBDLFS
*OJUJBUF
$PMMFDU 
3FTVMUT
"OBEWFSTBSZTFOETUIF
DPMMFDUFESFTVMUTGSPN
WJDUJNTCSPXTFSTUPJUT
PXOTFSWFS

View Slide

TIJGUKTJOGP
6NN JTJUSFBMJTUJD  
8IBU94-FBLT944FBSDIHJWFTVT

‣ 6OMJLF944 94-FBLT944FBSDI
‣ EPFTOPUQSPWJEFBDUVBMDPOUFOUTPGEBUB
‣ EVFUP4BNF0SJHJO1PMJDZ
‣ EPQSPWJEFGFBUVSFT DIBSBDUFSJTUJDT
PGEBUB
‣ FH8IFUIFSUIFEBUBDPOUBJOTBTQFDJpDWBMVFPSOPU
‣ 3FTQPOTFTXJUITFBSDISFTVMUTIBWFMPOHFSMFOHUIUIBOPOFXJUI
OPSFTVMUT
‣ FH8IFUIFSUIFEBUBIBTDPNQMFYJUZPSOPU
‣ $PNQMFYJUZPGUFOSFTVMUTJOMPOHFSQSPDFTTJOHUJNF

View Slide

TIJGUKTJOGP
)JTUPSZ94-FBLT

/PXBEBZT BCVODIPG1P$TBSFCFDPNJOHBWBJMBCMFJOPOMJOF
)551$BDIF$SPTT4JUF-FBLT 
IUUQTJSEBSDLDBUCMPHTQPUDPNIUUQDBDIFDSPTTTJUFMFBLTIUNM
$SPTT4JUF$POUFOUBOE4UBUVT5ZQFT-FBLBHF 
IUUQTNFEJVNDPNCVHCPVOUZXSJUFVQDSPTTTJUFDPOUFOUBOETUBUVTUZQFTMFBLBHFFGEBCB
&WBOTQSFTFOUFEUIFQSJNJUJWFGPSNPG944FBSDIXJUI
JNHMPBEUJNJOH &WBOT
 
$SPTTEPNBJOTFBSDIUJNJOH 
IUUQTTDBSZCFBTUTFDVSJUZCMPHTQPUDPNDSPTTEPNBJOTFBSDIUJNJOHIUNM
(FMFSOUFSFUBMHBWFUIFTPQIJTUJDBUFEBUUBDLTGPSTJUFTXJUI
TFBSDIFOHJOFTOBNFE944FBSDI (FMFSOUFSFUBM

View Slide

TIJGUKTJOGP
/PUFT
94-FBLT944FBSDI
‣ 94-FBLTIBWFBUUSBDUFEBUUFOUJPO CVUOPUFOPVHI
‣ #PUIBDDVSBDZBOEF⒎FDUJWFOFTTIBWFCFFOJNQSPWFE
‣ 3FGFSFODFT
‣ /PUFYTMFBLTYTMFBLTIBTBDPNQSFIFOTJWFTVSWFZQBHF 
IUUQTHJUIVCDPNYTMFBLTYTMFBLTXJLJ-JOLT
‣ ':*/FX94-FBLUFDIOJRVFTSFWFBMGSFTIXBZTUPFYQPTFVTFS
JOGPSNBUJPOCZ1PSU4XJHHFS 
IUUQTQPSUTXJHHFSOFUEBJMZTXJHOFXYTMFBLUFDIOJRVFTSFWFBMGSFTIXBZTUPFYQPTFVTFSJOGPSNBUJPO

‣ ':*94-FBLTBOE944FBSDICZ(PPHMF 
IUUQTTJUFTHPPHMFDPNTJUFCVHIVOUFSVOJWFSTJUZOPOWVMOYTMFBLT

View Slide

&YBNQMF 
'SBNF$PVOU

View Slide

TIJGUKTJOGP
XJOEPXMFOHUI 
"VTFGVMQSPQFSUZGPSDSPTTPSJHJOBUUBDLFST
‣ XJOEPXMFOHUI
XJOEPXGSBNFTMFOHUI
SFUVSOTUIF
OVNCFSPGGSBNFTJOUIFXJOEPX 
2VPUFEIUUQTEFWFMPQFSNP[JMMBPSHFO64EPDT8FC"1*
8JOEPXMFOHUI
‣ $SPTTPSJHJOBDDFTTUP
XJOEPXMFOHUIJTBMMPXFEVOEFS
TBNFPSJHJOQPMJDZ 401
 
4FFIUUQTEFWFMPQFSNP[JMMBPSHFO64EPDT8FC4FDVSJUZ4BNF
[email protected]

‣ $BOUIJTQSPQFSUZCFVUJMJ[FEGPS
TPNFLJOETPGBUUBDLT

View Slide

TIJGUKTJOGP
944"VEJUPS 
"HPPEGSJFOEGPS944NBOJB

‣ 944"VEJUPS
‣ 99441SPUFDUJPOIFBEFS
EFpOFTUIFBDUJPOXIFO
3FqFDUFE
944JTGPVOE
‣ 5IFSFBSFUXPNPEFT 
pMUFSCMPDL
‣ 3FTFBSDIFSTIBWFUBDLMFEXJUI
CZQBTTJOHPG944"VEJUPS

View Slide

TIJGUKTJOGP
944"VEJUPSXJOEPXMFOHUI
‣ 8IFOUIFSFJTTQFDJpDDPOUFOUUIBUDBOXBLF944"VEJUPSJO
BQBHFBOEUIFQBHFIBT BUMFBTUPOF
JGSBNF
‣ 8IFO944"VEJUPSCMPDLT XJOEPXMFOHUI
‣ 8IFOOPU XJOEPXMFOHUI
‣ 8FDBOHFUBCJUXIFUIFSUIFTQFDJpDDPOUFOUJT
JODMVEFEPSOPUCZUIFQBHFBTMPOHBTUIFDPOUFOUDBO
XBLF944"VEJUPS:BZ

let secret_flag = true;

View Slide

%&.054($5' 
3&$0/
/05&.PSFTJNQMZ XFDBOEFUFDUUIFXBLFPG944"VEJUPSCZPCTFSWJOHIPX
NBOZUJNFTJGSBNFTPOMPBEFWFOUPDDVST 
&YBNQMFD$5'pMFNBOBHFS 
IUUQTHJTUHJUIVCDPNMXJPBFBBFBBDEBDEDBE

View Slide

TIJGUKTJOGP
4JEF&⒎FDUTPG#MPDLJOH 
8IBU944"VEJUPSDBVTFT
‣ *G944"VEJUPSCMPDLT
‣ TPNFQSPQFSUJFTNBZTFFNTUPCFEJ⒎FSFOUGSPNUIFWBMVFT
XIFOUIFQBHFJTTIPXOVTVBMMZ
‣ *G944"VEJUPSpMUFST
‣ 1BHFTUSVDUVSFT FTQFDJBMMZUIFqPXPGBQQSPQSJBUF+4
FYFDVUJPOqPX
DBOCFCSPLFO
‣ &YBNQMF9944/JHIUNBSFNPEFBUUBDL944"UUBDLT
&YQMPJUJOH944'JMUFS !NBTBUPLJOVHBXB
 
IUUQTXXXTMJEFTIBSFOFUNBTBUPLJOVHBXBYYOFO
‣ ':**OGPSNBUJPOUIFGUBUUBDLTBCVTJOHCSPXTFST944pMUFS 
IUUQTXXXNCTEKQCMPHIUNM

View Slide

&YBNQMF 
5JNJOH*OGPSNBUJPO

View Slide

TIJGUKTJOGP
5JNJOH"UUBDL 8FC
 
"LJOEPGTJEFDIBOOFMBUUBDLT

8IBUBUUBDLFSTDBOEPXJUIUJNJOHJOGPSNBUJPO
‣ 'JSTU*EFB 'FMUFOBOE4DIOFJEFS

‣ #SPXTFSTDBDIFIBTF⒎FDUTPOUIFMPBEJOHUJNFPGSFTPVSDFT
‣ $BDIFTBSFPGUFOBWBJMBCMFGPSSFTPVSDFTBDDFTTFESFDFOUMZ
‣ )FODF UIFMPBEJOHUJNFSFqFDUTCSPXTJOHIJTUPSZ
‣ 5IFSFBSFUXPWJFXQPJOUT
‣ $POOFDUJWJUZEJSFDUPSDSPTTTJUF
‣ 5BSHFU5JNJOHTFSWFSTJEFUJNJOHPSDMJFOUTJEFUJNJOH

View Slide

TIJGUKTJOGP
%JSFDU5JNJOH"UUBDL 
#PSU[BOE#POFI $SPTCZFUBM

‣ $POEJUJPOT*OGPSNBUJPOUIBUBUUBDLFSTXBOUUPMFBLB⒎FDUTUP
TJUFXJEFCFIBWJPS
‣ "UUBDLT
‣ )JEEFOCPPMFBOWBMVFTEBUBTJ[FDBOCFFTUJNBUFEXJUI
NFBTVSJOHQSPDFTTJOHUJNF #PSU[BOE#POFI

‣ 5PUIFCFTUPGNZLOPXMFEHF UIFZBSFUIFpSTUXIPEFTDSJCFEUIF
DPODFQUPGEJSFDUUJNJOHBUUBDL
‣ &WFOSFNPUFUJNJOHBUUBDLT BQQSPQSJBUFTUBUJTUJDBMNFUIPET
HJWFBUUBDLFSTBDDVSBUFBOBMZTJT $SPTCZFUBM

‣ 5IFCPYUFTUUIFZQSFTFOUFEBSFPGUFOVTFEJOPUIFSSFTFBSDI

View Slide

TIJGUKTJOGP
$SPTTTJUF5JNJOH"UUBDL 
#PSU[BOE#POFI

‣ "UUBDLT
‣ 8JUITFSWFSTJEFUJNJOH
‣ *OJUJBMDPODFQUPG944FBSDIJTCBTFEPOTFSWFSTJEFUJNJOH
‣ &WBOT NFOUJPOFECFGPSF

‣ (FMFSOUFSFUBM NFOUJPOFECFGPSF

‣ 8JUIDMJFOUTJEFUJNJOH
‣ BMTPLOPXOBTCSPXTFSCBTFEUJNJOHBUUBDLT
‣ &YBNQMFT
‣ $BDIF'FMUFOBOE4DIOFJEFS 7BO(PFUIFNFUBM
‣ $444UPOF ,PUDIFSFUBM 4NJUIFUBM FUD

View Slide

TIJGUKTJOGP
$MJFOUTJEF5JNJOH
 
BLB#SPXTFSCBTFE5JNJOH"UUBDL

‣ *EFB
‣ $BDIFTIBWFF⒎FDUTPOQSPDFTTJOHUJNF
‣ "UUBDLT
‣ 5IFpSTUDPODFQUPGUJNJOHBUUBDLJOUIF8FCEFSJWFTGSPN
DBDIFCBTFEBUUBDLT 'FMUFOBOE4DIOFJEFS

‣ 'FBUVSFTJOUSPEVDFEPONPEFSOCSPXTFSTDBOCFOFXTJEF
DIBOOFMTUIBUMFUBEWFSTBSJFTNFBTVSFNPSFBDDVSBUFUJNJOH
7BO(PFUIFNFUBM

‣ FH$BDIF"1* PG4FSWJDF8PSLFS

‣ FH"QQMJDBUJPO$BDIF

View Slide

TIJGUKTJOGP
$MJFOUTJEF5JNJOH
 
BLB#SPXTFSCBTFE5JNJOH"UUBDL

‣ *EFB
‣ 3FOEFSJOHIBTBUJHIUSFMBUJPOXJUIBDPOUFOUUPCFSFOEFSFE
‣ &WFOEBUBXIJDIDBOOPUCFUPVDIFEGSPN+4DBOCFSFOEFSFE
‣ "UUBDLT
‣ 1JYFMQFSGFDUUJNJOHBUUBDLT 4UPOF
 
[email protected]@[email protected]"[email protected]@)[email protected]

‣ 1JYFMTUFBMJOHUJNJOHBUUBDLT ,PUDIFSFUBM
 
IUUQTEMBDNPSHDJUBUJPODGN JE
‣ "CVTFPG1BJOU"1* %5SBOTGPSNT BOE47(T 4NJUIFUBM

 
IUUQTXXXVTFOJYPSHDPOGFSFODFXPPUQSFTFOUBUJPOTNJUI

View Slide

TIJGUKTJOGP
.PSF4PQIJTUJDBUFE0OFT 
1PTTJCMFBUUBDLTXBUDIJOHZPVSFOWJSPONFOUT
‣ 4PGUXBSFCBTFENJDSPBSDIJUFDUVSBMBUUBDLT
‣ 4PGUXBSFCBTFENJDSPBSDIJUFDUVSBMTJEFDIBOOFMBUUBDLT
FYQMPJUUJNJOHBOECFIBWJPSEJ⒎FSFODFTUIBUBSF
QBSUJBMMZ
DBVTFEUISPVHINJDSPBSDIJUFDUVSBM
PQUJNJ[BUJPOT JF EJ⒎FSFODFTUIBUBSFOPUBSDIJUFDUVSBMMZ
EPDVNFOUFE 
4PGUXBSFCBTFE.JDSPBSDIJUFDUVSBM"UUBDLTIUUQTBSYJWPSHBCT

‣ 3FTFBSDI2VFTUJPOT+BWB4DSJQU XIJDIJTFYFDVUFEJOUIF
TBOECPY JTFOPVHIUPCFVTFEGPSNJDSPBSDIJUFDUVSBM
BUUBDLT

View Slide

TIJGUKTJOGP
'SPN+44BOECPY 
4PGUXBSFCBTFENJDSPBSDIJUFDUVSBMBUUBDLT
‣ 3FTVMUT
‣ 5JNFSTBWBJMBCMFJO+BWB4DSJQUJTFOPVHIGPSBUUBDLFSTUP
QFSGPSNNJDSPBSDIJUFDUVSBMBUUBDLT 4DIXBS[FM
 
'BOUBTUJD5JNFSTBOE8IFSFUP'JOE5IFN)JHI3FTPMVUJPO.JDSPBSDIJUFDUVSBM"UUBDLTJO+BWB4DSJQU
IUUQTHSVTTDDpMFTGBOUBTUJDUJNFSTQEG

‣ 5IFZEFNPOTUSBUFEBOFX%3".CBTFEDPWFSUDIBOOFMXJUI+4
‣ ,FZTUSPLFUJNJOHBUUBDLTJOTBOECPYFE+4 -JQQFUBM
 
1SBDUJDBM,FZTUSPLF5JNJOH"UUBDLTJO4BOECPYFE+BWB4DSJQUIUUQTMJOLTQSJOHFSDPNDIBQUFS
@

‣ +45FNQMBUF"UUBDLT 4DIXBS[FUBM
 
+BWB4DSJQU5FNQMBUF"UUBDLT"VUPNBUJDBMMZ*OGFSSJOH)PTU*OGPSNBUJPOGPS5BSHFUFE&YQMPJUTIUUQT
[email protected]#@4DIXBS[@QBQFSQEG
‣ /05&4JUF*TPMBUJPOBOEEJTBCMJOH4IBSFE"SSBZ#V⒎FS
DVSSFOUMZ
NJUJHBUFUIPTFBUUBDLT

View Slide

&⒎FDUT.JUJHBUJPO

View Slide

TIJGUKTJOGP
&⒎FDUTPG94-FBLT 
94MFBLTQSPWJEFBQBSUPGJOGPSNBUJPO OPUUIFXIPMF

‣ &WFOTFDVSF8FCTJUFTIBWFBQPUFOUJBMUPCFUBSHFUFE
‣ &WFOJG)551IFBEFSTBSFTFUTFDVSFMZ
‣ FH3FRVFTUBOE$PORVFS&YQPTJOH$SPTT0SJHJO3FTPVSDF4J[F 
[email protected]@[email protected]
‣ DG6944
‣ *UOFFETBMPUPGF⒎PSUTUPNJUJHBUFDPNQMFUFMZ
‣ )BWFZPVFWFSCFFOUIPVHIUBCPVUEBUBMFBLBHFGSPNUJNJOH
JOGPSNBUJPO
‣ /FXQPMJDJFTUPNJUJHBUFUIFNIBWFCFFOEJTDVTTFE CVU

View Slide

TIJGUKTJOGP
.JUJHBUJPO 
8IBUDBOXFEPGPSUIPTFBUUBDLT
‣ "MPUPGTFDVSJUZIFBEFSTBUUSJCVUFT
‣ 4BNFTJUF$PPLJF
‣ 9'SBNF0QUJPOT GSBNFBODFTUPST PG$41

‣ $SPTT0SJHJO0QFOFS1PMJDZ $001

‣ $SPTT0SJHJO3FTPVSDF1PMJDZ $031

‣ $SPTT0SJHJO3FTPVSDF#MPDLJOH $03#

‣ 'FUDI.FUBEBUB
‣ 4PNFPGUIFNIBWFCFFOTUJMMEJTDVTTFE
‣ ,FFQXBUDIJOHXDXFCBQQTFDJO(JU)VC

View Slide

TIJGUKTJOGP
4BNFTJUF$PPLJF 
3FTUSJDUJPOPGDPPLJFTVTBHFBUDSPTTTJUFSFRVFTUJOH
‣ 1SPCMFN$SPTTPSJHJOSFRVFTUTXJUIDPPLJFTPGUFODBVTFUIF
TFDVSJUZJTTVFTTVDIBT$43'
‣ 4PMVUJPO4BNFTJUF$PPLJF
‣ #Z4BNF4JUFBUUSJCVUFTPGDPPLJF TJUFPXOFSTDBOQSPIJCJUT
CSPXTFSTGSPNTFOEJOHDSPTTTJUFSFRVFTUTXJUIDPPLJFT
‣ 4BNF4JUF-BY0OMZUPQMFWFMOBWJHBUJPOTJTBMMPXFE
‣ 4BNF4JUF4USJDU/PDSPTTTJUFSFRVFTUXJUIDPPLJFTJTBMMPXFE
‣ 4FF4BNF4JUFDPPLJFTFYQMBJOFE 
IUUQTXFCEFWTBNFTJUFDPPLJFTFYQMBJOFE

View Slide

TIJGUKTJOGP
'SBNJOH3FTUSJDUJPO 
9'SBNF0QUJPOT GSBNFBODFTUPST PG$41

‣ (FOFSBM1SPCMFN 
3FBM8PSME&YBNQMFTPGUFOSFMJFTPOXJOEPXMFOHUI 
IUUQTHJUIVCDPNYTMFBLTYTMFBLTXJLJ3FBM8PSME&YBNQMFT
‣ $BTFXIFOBQBHFJTGSBNFE CPUIPGUIFQBHF DIJME
BOE
JUTQBSFOUIBWFSFGFSFODFTUPAXJOEPXAUPFBDIPUIFS
‣ GSPNDIJMEUPQBSFOUXJOEPXQBSFOUPSXJOEPXUPQ
‣ GSPNQBSFOUUPDIJME [email protected]
DPOUFOU8JOEPX
‣ 4PMVUJPOT9'SBNF0QUJPOT GSBNFBODFTUPST PG$41

‣ 3FTUSJDUJOHDSPTTTJUFGSBNJOHSFEVDFTBUUBDLTVSGBDFT

View Slide

TIJGUKTJOGP
$SPTT0SJHJO0QFOFS1PMJDZ 
3FTUSJDUJPOPGVTJOHAXJOEPXASFGFSFODFGSPNPQFOFST
‣ $BTFXIFOXJOEPXPQFOJTFYFDVUFE UIFPQFOFEXJOEPX
DBOBDDFTTUPAXJOEPXAPGJUTPQFOFS
‣ XJOEPXPQFOFSMPDBUJPOIUUQFWJMDPN
‣ 4PMVUJPO$SPTT0SJHJO0QFOFS1PMJDZ $001

‣ $SPTT0SJHJO0QFOFS1PMJDZIFBEFSEFpOFTXIFO
AXJOEPXPQFOFSAJTBWBJMBCMF
‣ 4FFBOOFWLDPPQNE BTFNJGPSNBMEFpOJUPOPG$001
 
IUUQTHJTUHJUIVCDPNBOOFWLGEEDDGGCEBDGF

View Slide

TIJGUKTJOGP
$SPTT0SJHJO3FTPVSDF1PMJDZ 
3FTUSJDUJPOPGUIFBWBJMBCMFPSJHJOPGSFTPVSDFT
‣ 1SPCMFN$SPTTPSJHJOOPDPSTSFRVFTUTDBVTFTFDVSJUZ
JTTVFTTVDIBTTJEFDIBOOFMBUUBDLT
‣ DG4FSWJDF8PSLFSBCVTF 7BO(PFUIFNFUBM

‣ 4PMVUJPO$SPTT0SJHJO3FTPVSDF1PMJDZ $031

‣ 5IJTIFBEFSQSFWFOUCSPXTFSTGSPNMPBEJOHSFTPVSDFTGFUDIFE
CZDSPTT TJUFcPSJHJO
OPDPSTSFRVFTUT
‣ /05&GPSNFSMZ UIJTJTDBMMFE'SPN0SJHJO

Cross-Origin-Resource-Policy: same-site | same-origin

View Slide

TIJGUKTJOGP
'FUDI.FUBEBUB 
*OGPUIBUIFMQTTFSWFSEFUFDUVOVTVBMSFRVFTUTGPSSFTPVSDFT
‣ 1SPCMFN
‣ 4FSWFSTDBOOPULOPXIPXUIFJSSFTPVSDFTXJMMCFVTFE
‣ 4PMVUJPO'FUDI.FUBEBUB
‣ *UXPVMECFIFMQGVMJGTFSWFSTDPVMENBLFNPSFJOUFMMJHFOU
EFDJTJPOTBCPVUXIFUIFSPSOPUUPSFTQPOEUPBHJWFO
SFRVFTUCBTFEPOUIFXBZUIBUJU`TNBEF IUUQT
NJLFXFTUHJUIVCJPTFDNFUBEBUB

‣ 1SPWJEFEXJUI4FD'FUDIIFBEFST

View Slide

5IBOLZPVGPS-JTUFOJOH

[email protected] !ZOVDIZ
IUUQTTIJGUKTJOGP

View Slide

"Gimme a bit!" - Exploring Attacks in the "Post-XSS" World

"Gimme a bit!" - Exploring Attacks in the "Post-XSS" World

Takashi Yoneuchi

More Decks by Takashi Yoneuchi

Other Decks in Technology

Featured

Transcript