Kev daws txoj haujlwm nrog pwnable.kr 25 - otp. Linux cov ntaub ntawv loj txwv

Hauv tsab xov xwm no peb yuav daws qhov 25 txoj haujlwm los ntawm qhov chaw pw kr.

cov ntaub ntawv koom haumTshwj xeeb tshaj yog rau cov neeg uas xav kawm ib yam dab tsi tshiab thiab txhim kho nyob rau hauv txhua cheeb tsam ntawm cov ntaub ntawv thiab computer kev ruaj ntseg, kuv yuav sau thiab tham txog cov nram qab no pawg:

• PWN;
• cryptography (Crypto);
• network technologies (Network);
• rov qab (Reverse Engineering);
• steganography (Stegano);
• kev tshawb nrhiav thiab kev siv ntawm WEB vulnerabilities.

Ntxiv rau qhov no, kuv yuav qhia kuv cov kev paub hauv computer forensics, malware thiab firmware tsom xam, tawm tsam ntawm wireless networks thiab hauv cheeb tsam network, ua pentests thiab sau ntawv exploits.

Yog li koj tuaj yeem paub txog cov ntawv tshiab, software thiab lwm yam ntaub ntawv, kuv tsim Telegram channel и pab pawg los tham txog tej teeb meem nyob rau hauv cheeb tsam ntawm IIKB. Tsis tas li koj tus kheej thov, cov lus nug, cov lus qhia thiab cov lus pom zoo Kuv mam li saib thiab teb rau sawv daws..

Txhua yam ntaub ntawv yog muab rau kev kawm nkaus xwb. Tus sau ntawm daim ntawv no xav tias tsis muaj lub luag haujlwm rau kev puas tsuaj rau leej twg los ntawm kev siv cov kev paub thiab cov txheej txheem tau txais los ntawm kev kawm cov ntaub ntawv no.

Kev daws qhov haujlwm otp

Cia peb txuas ntxiv nrog rau ntu thib ob. Kuv mam li hais tam sim ntawd tias nws nyuaj dua li thawj zaug, tab sis lub sijhawm no lawv tsis muab qhov chaws ntawm qhov program. Tsis txhob hnov ​​​​qab txog kev sib tham ntawm no (https://t.me/RalfHackerPublicChat) thiab ntawm no (https://t.me/RalfHackerChannel). Cia peb pib.

Nyem rau ntawm lub cim nrog kos npe otp. Peb tau muab qhov chaw nyob thiab chaw nres nkoj los txuas rau.

Peb txuas thiab saib ib ncig ntawm lub server.

Ib tug chij uas peb nyeem tsis tau, ib qhov kev pab cuam thiab nws qhov chaws. Cia peb saib ntawm qhov chaw.

Cia peb txheeb nws. Qhov kev zov me nyuam siv tus password ua qhov kev sib cav.

Tom ntej no, random 16 bytes khaws cia rau hauv qhov sib txawv otp.

Ib cov ntaub ntawv nrog lub npe random yog tsim nyob rau hauv tmp nplaub tshev (thawj 8 bytes yog otp) thiab random 8 bytes yog sau rau nws (qhov thib ob 8 bytes yog otp).

Rau qee qhov laj thawj, tus nqi ntawm cov ntaub ntawv tsim tau nyeem thiab muab piv nrog tus password nkag.

Qhov no yog qhov uas qhov tsis zoo tuaj. Nws muaj nruab nrab ntawm kev txuag tus lej generated rau ib cov ntaub ntawv. Peb tuaj yeem txwv cov ntaub ntawv loj, piv txwv li, rau 0, ces thaum sau ntawv thiab nyeem ntawv, 0 yuav muab piv nrog tus password, qhov no tuaj yeem ua tau zoo li no.

# ulimit -f 0

Tam sim no cia peb khiav qhov program.

Peb tau txais qhov yuam kev. Tsis muaj teeb meem, nws tuaj yeem ua tiav siv tib lub python.

python -c "import os, signal; signal.signal(signal.SIGXFSZ, signal.SIG_IGN); os.system('./otp 0')" 

Peb tau txais tus chij thiab peb qhov yooj yim 100 ntsiab lus. Thiab peb txuas ntxiv: nyob rau hauv tsab xov xwm tom ntej peb yuav kov hauv Web. Koj tuaj yeem koom nrog peb ntawm Telegram.

Tau qhov twg los: www.hab.com