栈溢出入门之CVE-2012-0158漏洞分析

PGg0IGlkPSJ0b2MtMCI+5ryP5rSe5Y6f55CG77yaPC9oND48bGk+6L+Z5Liq5ryP5rSe5Y+R55Sf5Zyob2ZmaWNl55qE5LiA5Liq57uE5Lu2TVNDT01DVEwuT0NY77yM5aSa5Liq54mI5pysb2ZmaWNl55qE6K+l5qih5Z2X6YO95a2Y5Zyo6L+Z5Liq5ryP5rSe77yMTVNDT01DVEwuT0NY6L+Z5Liq5ryP5rSe5qih5Z2X5pivb2ZmaWNl6Kej5p6QYWN0aXZlWOaOp+S7tueUqOWIsOeahOS4gOS4quWKqOaAgeW6k++8jOW9k+S4gOS4qm9mZmljZeaWh+aho+S4reWMheWQq2FjdGl2ZVjov5nnsbvmjqfku7blhYPntKDnmoTor53vvIzmr5TlpoLmjInpkq7jgIHliJfooajjgIHmoJHlvaLmjqfku7bml7bvvIzmlofmoaPpgJrov4dvZmZpY2XmiZPlvIDml7bvvIxNU0NPTUNUTC5PQ1jlsLHkvJrooqvoh6rliqjovb3lhaVvZmZpY2XnqIvluo/nmoTov5vnqIvnqbrpl7TooqvosIPnlKjmnaXop6PmnpDlkozmmL7npLrmjqfku7bjgII8YnIvPiMjIyMg5ryP5rSe57G75Z6L77ya57yT5Yay5Yy65qCI5rqi5Ye644CCPC9saT48bGk+5rWL6K+V546v5aKD77yaWFBTUDIrb2ZmaWNlMjAwN+OAgjwvbGk+PGxpPuiwg+ivleWZqO+8mkltbXVuaXR5IERlYnVnZ2Vy44CCPC9saT48cD7lhYjnlKjkuIDkuKpQT0PmnaXop4Llr5/muqLlh7rlj5HnlJ/nmoTml7blgJnmoIjkuK3nmoTmlbDmja7liIbluIPjgILpppblhYjmiZPlvIBXSU5XT1JELkVYRe+8jOeEtuWQjueUqEltbXVuaXR5IApEZWJ1Z2dlcumZhOWKoFdJTldPUkQuRVhF77yM54S25ZCORjnov5DooYzvvIzkuYvlkI7lsIZQT0PmtYvor5XmlofmoaNwb2MuZG9j5ouW6L+bV0lOV09SRC5FWEXvvIzlpoLlm77vvJrnqIvluo/lnKgweDQxNDE0MTQx6L+Z5aSE5Zyw5Z2A5pat5LiL77yM6L+Z5piv5LiA5Liq5peg5pWI55qE5YaF5a2Y5Zyw5Z2A77yM5omA5Lul56iL5bqP5peg5rOV57un57ut6L+Q6KGM77yM5qC55o2u5qCI5rqi5Ye655qE5Yip55So5pa55byP5Yik5pat77yMMHg0MTQxNDE0Mei/meS4quS9jee9ruW6lOivpeaYr+WHveaVsOi/lOWbnuWcsOWdgOS4gOexu+eahOaVsOaNruOAguaOpeedgOinguWvn+i/meS4qui/lOWbnuWcsOWdgOWxnuS6juWTquS4quWHveaVsO+8jOWcqOWPs+S4i+inkueahOagiOWMuuWPs+mUrj0+4oCdRm9sbG93CiBpbiAKRHVtcOKAnSzlnKjlt6bovrnnmoTlhoXlrZjmlbDmja7ljLrlh7rnjrDomZrmi5/lnLDlnYDlr7nlupTnmoTmnLrlmajnoIHvvIzlnKjor6XljLrlj7PplK49PuKAnURpc2Fzc2VtYmxl4oCd5bCx55yL5Yiw5LqG5a+55bqU55qE5rGH57yW5oyH5Luk77yM5ZCR5LiK5Zue5rqv5bCx55yL6IO95Yiw5Ye95pWwc3ViXzI3NUM4OUM344CCPC9wPjxwPjxpbWcgc3JjPSJodHRwczovL2Jicy56a2FxLmNuL3VwbG9hZC91c2VyZmlsZS8xOTMyLzIzNzliNThkODA4NmY0MTNlNWYyZDFjNDIzNWJmYWMxLnBuZyIvPjwvcD48cD48YnIvPjwvcD48cD7mvI/mtJ7lrZjlnKjnmoTkvY3nva7mmK9NU0NPTUNUTC5PQ1jmqKHlnZfvvIzlm6DmraRzdWJfMjc1Qzg5QzfkuZ/lsLHlr7nlupTkuo5NU0NPTUNUTC5PQ1jnmoTkvY3nva7vvIzmjqXkuIvmnaXkuIvmlq3ngrnnnIvnnIvmlbDmja7mmK/mgI7kuYjlpI3liLbliLDnvJPlhrLljLrnmoTvvIzlpoLmnpznm7TmjqXlnKjov5nph4zkuIvmlq3ngrnmmK/msqHms5Xmlq3kuIvnmoTvvIzlr7nmr5TkuabkuIrnmoTliIbmnpDlj6/nn6XvvIxNU0NPTUNUTOaooeWdl+aYr+WcqOaJk+W8gHBvYy5kb2Pml7bmiY3liqDovb3vvIzov5nph4zlhYjigJxBbHQrReKAneaJvuWIsE1TQ09NQ1RM5a+55bqU55qE6Lev5b6E77yM5YaN55SoSW1tdW5pdHkKIERlYnVnZ2Vy5Yqg6L296L+Q6KGM77yM54S25ZCOYnAgMHgyNzVDODlDN++8jOS5i+WQjuWcqOWKoOi9vXBvYy5kb2PlsLHlj6/ku6XlnKhzdWJfMjc1Qzg5Qzfmlq3kuIvjgII8L3A+PHA+PGJyLz48L3A+PHA+PGltZyBzcmM9Imh0dHBzOi8vYmJzLnprYXEuY24vdXBsb2FkL3VzZXJmaWxlLzE5MzIvMDQyYzVmYjg5ZDVkYzJkOWIxZjYzOTIxZGI5MmExZDYucG5nIi8+PC9wPjxwPui/memHjOS4gOWFseiwg+eUqOS6huS4pOasoXN1Yl8yNzVDODc2RO+8mjwvcD48cD48aW1nIHNyYz0iaHR0cHM6Ly9iYnMuemthcS5jbi91cGxvYWQvdXNlcmZpbGUvMTkzMi80MWZlMjA5MmM4NzU4Njg4NjU3Y2NjYTViNzkzYzAzMy5wbmciLz48L3A+PHA+PGJyLz48L3A+PHA+5ZCM5pe25bCGTVNDT01DVEwuT0NY5qih5Z2X5ZyoSURB5Y+N57yW6K+R55SoRjXnnIvnnIvov5nmrrXku6PnoIHnmoTln7rmnKznlKjpgJTvvJo8L3A+PHA+PGltZyBzcmM9Imh0dHBzOi8vYmJzLnprYXEuY24vdXBsb2FkL3VzZXJmaWxlLzE5MzIvMWQ2MDViOTY2MDVlZWI4ZTU5NzJhMDg3MDI1NDJmZWQucG5nIi8+PC9wPjxwPjxici8+PC9wPjxwPklEQeS4reeahOS8quS7o+eggeKAnGlmKFY1ID09IAoxNzg0ODM1OTA3KeKAneS4re+8jDE3ODQ4MzU5MDflr7nlupTnmoTljYHlha3ov5vliLbkuLoweDZBNjI2RjQz77yM5a+55bqU55qEQVNDSUnnoIHkuLrigJxqYm9D4oCd77yM5oyJ54Wn5bCP56uv5a2Y5YKo6KeE5YiZ6YCG6L+H5p2l5bCx5piv4oCcQ29iauKAne+8jOWcqEltbXVuaXR5CiAKRGVidWdnZXLkuK1GN+i3n+i/m3N1Yl8yNzVDODc2ROWPr+S7peefpemBk++8jOesrOS4gOasoeiwg+eUqHN1Yl8yNzVDODc2ROaYr+WkjeWItuS6huKAnENvYmpk4oCdLOi/meW6lOivpeaYr+WIpOaWreeoi+W6j+aOpeedgOimgeWkhOeQhueahOWvueixoeWQjeWtl+aYr+S4jeaYr+KAnENvYmrigJ3vvIznlLFNU0NPTUNUTOeahOe7k+aehOWPr+efpe+8jOi/meaYr01TQ09NQ1RMLk9DWOaooeWdl+eahOesrOS6jOS4quWvueixoeOAgkNvYmo6OmxvYWTnlKjmnaXor7vlj5bmlbDmja7jgII8L3A+PHA+PGJyLz48L3A+PHA+PGltZyBzcmM9Imh0dHBzOi8vYmJzLnprYXEuY24vdXBsb2FkL3VzZXJmaWxlLzE5MzIvZjI0MThhNzE2ZmQ4YzBmN2ZjMjM1Zjc2OGU5OGQ0ODUucG5nIi8+PC9wPjxwPjxpbWcgc3JjPSJodHRwczovL2Jicy56a2FxLmNuL3VwbG9hZC91c2VyZmlsZS8xOTMyLzc2MTllNGQ2MjBiYTI3MmExNjk5OWEwMTQ0OGUyOTUyLnBuZyIvPjwvcD48cD48YnIvPjwvcD48cD7kuYvlkI7lho3ot5/ov5vnrKzkuozkuKpzdWJfMjc1Qzg3NkTvvJrlj5HnjrDkuobmuqLlh7rnmoTnjrDlnLrlsLHlnKjov5nkuKrlh73mlbDvvIzlr7nmr5TliJrlvIDlp4vliqDovb3ml7bnmoTmoIjnirbmgIHvvIwweDI3NUM4N0NC5aSE55qE5oyH5Luk5bCG5pWw5o2u5aSN5Yi25Yiw5qCI5Lit77yM5bm26KaG55uW5LqG5qCI5LitMHgwMDEyNEMwQ+WkhOeahOi/lOWbnuWcsOWdgOOAgjwvcD48cD48YnIvPjwvcD48cD48aW1nIHNyYz0iaHR0cHM6Ly9iYnMuemthcS5jbi91cGxvYWQvdXNlcmZpbGUvMTkzMi8yZTQxZjdlOTUxZjdmOWFlZmQzZThiMTUwMTVmYWRhOC5wbmciLz48L3A+PHA+PGJyLz48L3A+PHA+PGltZyBzcmM9Imh0dHBzOi8vYmJzLnprYXEuY24vdXBsb2FkL3VzZXJmaWxlLzE5MzIvMjQ4M2EwYzAxMTdjYjAzNGIyNjBhNmNmYmExNDUyYzYucG5nIi8+PC9wPjxwPjxici8+PC9wPjxwPuWcqElEQeS4reeahOS8quS7o+eggeS4re+8jOimgeaJp+ihjOesrOS6jOS4qnN1Yl8yNzVDODc2RO+8jOmcgOimgea7oei2s+KAnGlmICggdjUgPT0gMHg2QTYyNkY0MyAmJiAKZHdCeXRlcyA+PSA4ICnigJ3vvIzlpoLmnpxkd0J5dGXlsI/kuo445bCx5LiN5omn6KGM44CC5q2k5pe25ZyoSW1tdW5pdHkgCkRlYnVnZ2Vy5Lit5Y+v5Lul55yL5Yiw77yac3M6W0VCUC1DXT09MHgwMDAwODI4Mizov5nov5zov5zlpKfkuo4477yM5ruh6Laz5LqG6L+Z6YeM5Yik5pat5p2h5Lu277yM6L+Z5qC3Q29iajo6bG9hZOWwseWPr+S7peivu+WPluWkmuS9meeahOaVsOaNru+8jOi/meS4quaEj+aAneWlveWDj+WwseaYr+mdnuW+l+iuqeS9oOa6ouWHuuS4jeWPr+S6hu+8jOWOn+acrOeahOWIpOaWreadoeS7tuW6lOivpeaYr+KAnGlmCiAoIHY1ID09IDB4NkE2MjZGNDMgJiYgZHdCeXRlcyA8PSA4IAop4oCd77yM5q2j5piv6L+Z5Liq6K+v5YaZ55qE5aSn5LqO5L2/5b6X5aSa5L2Z55qE5pWw5o2u5Lmf6IO96KKr5aSN5Yi25Yiw5qCI5LitPC9wPjxwPjxici8+PC9wPjxwPjxpbWcgc3JjPSJodHRwczovL2Jicy56a2FxLmNuL3VwbG9hZC91c2VyZmlsZS8xOTMyL2MxMTQxYWMzZDIwY2IyOWFmZjk5M2I3MDAxMTQxNDI2LnBuZyIvPjwvcD48cD48YnIvPjwvcD48bGk+PHA+5o6l552A55So5LiA5Liq5Y+v5Lul5by55Ye66K6h566X5Zmo55qEd29yZOaWh+aho+WGjeeci+eci+a6ouWHuueahOWPkeeUn+WSjOWIqeeUqO+8mjwvcD48L2xpPjxsaT48cD7lhYjmnaXliLDmuqLlh7rlj5HnlJ/nmoTlnLDmlrnvvIzlnKjosIPor5XlmajnnIvliLDvvIzmmK/ku45EUzpbRVNJXei/meS4quS9jee9ruW8gOWni+WkjeWItu+8jOWcqOWGheWtmOS4rei3n+maj+eci+eci++8jOWPr+S7peeci+WIsOi/meauteS7o+eggeeUqOS6hjB4N0ZGQTQ1MTLvvIzljbPigJ1qbXAgZXNw4oCd5L2c5Li66Lez5p2/5Zyw5Z2A77yM6YKj5LmIc2hlbGxjb2Rl55qE6LW35aeL5L2N572u5bCx5pivZXNw55qE5YC844CCPC9wPjwvbGk+PHA+PGJyLz48L3A+PHA+PGltZyBzcmM9Imh0dHBzOi8vYmJzLnprYXEuY24vdXBsb2FkL3VzZXJmaWxlLzE5MzIvZDViMWFkNmM5ZDliMzVmZGYwOWQwZTE2YTFjYTY2Y2MucG5nIi8+PC9wPjxwPjxici8+PC9wPjxwPuaVsOaNruiiq+mAmui/h+a6ouWHuuiiq+WkjeWItuWIsOagiOS4re+8mjwvcD48cD48aW1nIHNyYz0iaHR0cHM6Ly9iYnMuemthcS5jbi91cGxvYWQvdXNlcmZpbGUvMTkzMi82N2E3NzhiNzcwZTU0OTNkMDcwMTQ5MGZhOTg1NzYxMi5wbmciLz48L3A+PHA+PGJyLz48L3A+PHA+6YCa6L+H4oCcam1wIGVzcOKAnei3s+WbnuagiOS4reaJp+ihjHNoZWxsY29kZe+8jEVTUOatpOaXtueahOWAvOS4ujB4MDAxMjRDNkM8L3A+PHA+PGltZyBzcmM9Imh0dHBzOi8vYmJzLnprYXEuY24vdXBsb2FkL3VzZXJmaWxlLzE5MzIvYWE0YTgzNmExNmNhMTVjOGRhY2JlMTBkZTBlMjEyYTQucG5nIi8+PC9wPjxwPjxici8+PC9wPjxwPuagiOS4reeahHNoZWxsY29kZeiiq+W9k+S9nOS7o+eggeaJp+ihjO+8mjwvcD48cD48aW1nIHNyYz0iaHR0cHM6Ly9iYnMuemthcS5jbi91cGxvYWQvdXNlcmZpbGUvMTkzMi9lOWNlZTExY2EzMjdhNDRhNGM4ZWQ2M2Y4OWFmZmM5Ni5wbmciLz48L3A+PHA+PGJyLz48L3A+PHA+5by55Ye66K6h566X5ZmoOjwvcD48cD48aW1nIHNyYz0iaHR0cHM6Ly9iYnMuemthcS5jbi91cGxvYWQvdXNlcmZpbGUvMTkzMi82YTFiNjlkZWM3MDVmZjI1NTBlMDk2ZmMzYjYyY2NkZi5wbmciLz48L3A+PHA+PGJyLz48L3A+PHA+5L+u5aSN5ZCO55qE5Ye95pWw5ZyoSURB5Lit5aaC5LiL77yM5Zyo5paw55qE5Yik5pat5p2h5Lu25Lit77yM4oCcQ29iajo6bG9hZOKAneivu+WPlueahOmVv+W6puW/hemhu+S4ujjlrZfoioLvvIzlkKbliJnkuI3ov5vooYzlpI3liLY8L3A+PHA+PGltZyBzcmM9Imh0dHBzOi8vYmJzLnprYXEuY24vdXBsb2FkL3VzZXJmaWxlLzE5MzIvMDQ3NDY2OTc2YjY0NjFmMGZjOWViZGYyYzYyZjI2NWQucG5nIi8+PC9wPjxwPjxici8+PC9wPjxwPui9rOiHquWFiOefpeekvuWMujxici8+PC9wPg==