Video: Thaum twg tsis pub dhau thawj zaug pib tshwm sim?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Cov thawj buffer overflow nres pib tshwm sim xyoo 1988. Nws tau hu ua Morris Internet worm. A dej ntws attack exposes vulnerabilities nyob rau hauv ib qhov kev pab cuam. Nws dej nyab lub cim xeeb nrog cov ntaub ntawv uas ntau tshaj li qhov program tswj tau.
Nyob rau hauv tas li ntawd, yuav ua li cas yog ib tug buffer overflow nres?
A tsis pub dhau tshwm sim thaum ib qho kev pab cuam lossis cov txheej txheem sim sau cov ntaub ntawv ntxiv rau qhov thaiv ntev ntev ntawm lub cim xeeb, lossis tsis pub , dua li tsis pub yog faib los tuav. Kev siv a tsis pub dhau tso cai rau tus neeg tawm tsam los tswj lossis tsoo cov txheej txheem lossis hloov kho nws qhov hloov pauv sab hauv.
Tsis tas li ntawd, Java puas muaj kev cuam tshuam rau kev tawm tsam tsis txaus? C++ yog tshwj xeeb yooj yim rau buffer overflow . Txawm li cas los xij, Java yog tsim los zam lub tsis pub dhau los ntawm kev txheeb xyuas cov ciam teb ntawm a tsis pub (zoo li ib qho array) thiab tiv thaiv kev nkag mus dhau ntawm cov ciam teb.
Raws li kev sib raug zoo, vim li cas thiaj li muaj qhov tsis zoo ntawm qhov tsis txaus ntseeg?
Cov ntsiab lus tseem ceeb ntawm Tsis Muaj Dej Qhov no yuam kev tshwm sim thaum muaj yog ntau cov ntaub ntawv hauv a tsis pub dua li nws ua tau tuav, ua rau cov ntaub ntawv dej ntws nyob rau hauv ib qho chaw cia khoom. Qhov no qhov 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.
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 *.
Pom zoo:
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Dab tsi yog qhov tshwm sim tshwm sim?
Ib qho 'kev mob tshwm sim' yog txhua yam uas cuam tshuam rau qee yam sab nraud ntawm qhov kev ua haujlwm raug tua. Cov haujlwm uas ua haujlwm yam tsis muaj kev phiv yog hu ua 'ntshiab' ua haujlwm: lawv siv cov lus sib cav, thiab lawv rov qab muaj nuj nqis. Tsis muaj dab tsi ntxiv tshwm sim thaum ua haujlwm
Kuv yuav ua li cas thiaj li txwv tsis pub kuv lub taskbar tsis tshwm puv npo?
Siv F11 Keyboard Shortcut Tsuas yog nias tus yuam sij F11 ntawm koj cov keyboard, thiab lub qhov rais ntawm lub app koj siv yuav mus rau hauv hom puv npo tam sim ntawd. F11 shortcut ua haujlwm txhua qhov Windows versions. Yog li yog tias koj muaj VLC thiab File Explorer qhib, ob qho tib si yuav mus puv npo zais qhov ua haujlwm