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Trend Micro Products Web Management Authentication Bypass
Secunia Advisory: SA31373
Release Date: 2008-08-22
Last Update: 2008-08-29
Popularity: 6,189 views

Critical:
Moderately critical
Impact: Security Bypass
Brute force
Where: From local network
Solution Status: Partial Fix

Software:Trend Micro Client Server Messaging Security for SMB 3.x
Trend Micro OfficeScan Corporate Edition 7.x
Trend Micro OfficeScan Corporate Edition 8.x
Trend Micro Worry-Free Business Security 5.x

Binary Analysis: BA535 :: Available for 1 Credit

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CVE reference:CVE-2008-2433


Description:
Secunia Research has discovered a vulnerability in Trend Micro OfficeScan, which can be exploited by malicious people to bypass authentication.

The vulnerability is caused due to insufficient entropy in a random session token used to identify an authenticated manager using the web console. An attacker can impersonate a currently logged on manager by predicting the authentication token.

NOTE: This vulnerability can further be exploited to execute arbitrary code.

Solution:
Apply patches.

Trend Micro OfficeScan 8.0 Service Pack 1:
http://www.trendmicro.com/ftp/product....0_SP1_Win_EN_CriticalPatch_B2402.exe

Trend Micro OfficeScan 8.0:
http://www.trendmicro.com/ftp/product...CE_8.0_Win_EN_CriticalPatch_B1351.exe

Trend Micro OfficeScan 8.0 Service Pack 1 Patch 1:
http://www.trendmicro.com/ftp/product...Patch1_Win_EN_CriticalPatch_B3037.exe

Worry-Free Business Security 5.0:
http://www.trendmicro.com/ftp/product...FBS_50_WIN_EN_CriticalPatch_B1404.exe

Trend Micro OfficeScan 7.0:
http://www.trendmicro.com/ftp/product...CE_7.0_Win_EN_CriticalPatch_B1397.exe

Trend Micro OfficeScan 7.3:
http://www.trendmicro.com/ftp/product...CE_7.3_Win_EN_CriticalPatch_B1362.exe

Provided and/or discovered by:
Dyon Balding, Secunia Research

Changelog:
2008-08-29: Updated "Solution" section with patches for OfficeScan 7.0 and 7.3.

Original Advisory:
Trend Micro:
http://www.trendmicro.com/ftp/documen...Win_EN_CriticalPatch_B2402_readme.txt
http://www.trendmicro.com/ftp/documen...adme_WFBS5 0_EN_CriticalPatch1404.txt

Secunia Research:
http://secunia.com/secunia_research/2008-31/


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