Video: Dab tsi yog buffer overflow nres nrog piv txwv?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Buffer Overflow Attack nrog piv txwv . Thaum cov ntaub ntawv ntau dua (tshaj li qub tau muab faib los khaws cia) tau muab tso rau ntawm qhov program lossis txheej txheem txheej txheem, cov ntaub ntawv ntxiv dej ntws . Nws ua rau qee cov ntaub ntawv ntawd xau tawm mus rau lwm qhov buffers , uas tuaj yeem corrupt lossis overwrite txawm cov ntaub ntawv lawv tau tuav.
Ib yam li ntawd, qhov kev tawm tsam tsis txaus ua haujlwm ua piv txwv li cas?
A tsis pub dhau tshwm sim thaum ib qho kev pab cuam lossis cov txheej txheem sim sau cov ntaub ntawv ntxiv mus rau qhov thaiv ntev ntawm lub cim xeeb (a tsis pub ), mas tsis pub yog faib los tuav. Los ntawm kev xa ua tib zoo crafted input rau ib daim ntawv thov, ib tus neeg tawm tsam tuaj yeem ua rau daim ntawv thov ua tiav qhov kev txiav txim siab, tejzaum nws yuav hla lub tshuab.
Ib yam li ntawd, buffer overflow txhais li cas? Nyob rau hauv cov ntaub ntawv kev ruaj ntseg thiab programming, a tsis pub dhau , los yog tsis pub dhau , yog ib qho anomaly qhov program, thaum sau cov ntaub ntawv rau a tsis pub , overruns cov tsis pub ciam teb thiab overwrite qhov chaw nco nyob ib sab. Nyob rau hauv ntau lub tshuab, lub cim xeeb layout ntawm ib qhov kev pab cuam, los yog lub system tag nrho, yog txhais tau zoo.
Tom qab ntawd, ib tus tuaj yeem nug, hom kev tawm tsam dab tsi yog qhov tsis txaus?
Stack overflow nres - Qhov no yog qhov feem ntau hom ntawm buffer overflow nres thiab koom nrog dej ntws a tsis pub ntawm hu pawg *. Heap overflow nres - Qhov no hom kev tawm tsam lub hom phiaj cov ntaub ntawv nyob rau hauv lub qhib nco pas hu ua heap *.
Dab tsi ua rau qhov tsis txaus siab txaus ntshai?
Cov ntsiab lus tseem ceeb ntawm Tsis Muaj Dej Qhov no yuam kev tshwm sim thaum muaj ntau data hauv a tsis pub tshaj nws tuaj yeem ua tau, ua rau cov ntaub ntawv dej ntws nyob rau hauv ib qho chaw cia khoom. Qhov no yooj yim tuaj yeem ua rau lub cev sib tsoo lossis, phem dua, tsim qhov nkag rau hauv cyberattack. C thiab C++ yog ntau raug rau tsis pub dhau.
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