Vulnerabilidade de segurança no software phpBB

Categoria: Alertas

quinta, 30 junho 2005 16:08

Sistemas Operativos Implicados:	Windows XP/NT/2K/Me/98/95, Linux, FreeBSD/OpenBSD, NetBSD
Aplicações Implicadas:	Indefinido

Foi descoberta uma vulnerabilidade de segurança nas versões phpBB 2.0.15 e anteriores, que permite execução de código remoto.
É aconselhável fazer upgrade para a versão 2.0.16 . -----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

===========================================================================
A U S C E R T A L E R T

AL-2005.015 -- AUSCERT ALERT
phpBB vulnerability allows arbitrary code execution
30 June 2005

===========================================================================

AusCERT Alert Summary
---------------------

Product: phpBB 2.0.15 and prior
Operating System: Linux variants
UNIX variants
Windows
Impact: Execute Arbitrary Code/Commands
Access: Remote/Unauthenticated

Original Bulletin: http://www.phpbb.com/phpBB/viewtopic.php?t=302011

OVERVIEW:

The popular web bulletin board system, phpBB, contains a vulnerability
allowing remote execution of code. AusCERT believes that this
vulnerability may be actively exploited by attackers in the near future,
or potentially incorporated in a self-propagating worm.

IMPACT:

Systems running vulnerable versions of phpBB may allow remote arbitrary
code execution. Potential impacts could include defacing any hosted
websites, installing malware such as backdoors and botnet clients, or
disabling the vulnerable system.

In addition, an attacker may incorporate exploits targeting this
vulnerability into a self-propagating worm designed to locate and
compromise vulnerable systems. This behaviour was previously used in
December 2004 by the Santy worm, described in AL-2004.044 [1].

MITIGATION:

Upgrade to phpBB 2.0.16, which is available from the phpBB website [2].
The phpBB web site additionally outlines a code change that will fix
this vulnerability [3].

AusCERT also recommends that network administrators audit their
networks to determine if any vulnerable versions of phpBB exist, and
either remove or update them.

REFERENCES:

[1] http://www.auscert.org.au/render.html?it=4653
[2] http://www.phpbb.com/downloads.php
[3] http://www.phpbb.com/phpBB/viewtopic.php?t=302011


AusCERT has made every effort to ensure that the information contained
in this document is accurate. However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation"s site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.

If you believe that your computer system has been compromised or attacked in
any way, we encourage you to let us know by completing the secure National IT
Incident Reporting Form at:

http://www.auscert.org.au/render.html?it=3192

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Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: Este endereçod e email está protegido contra piratas. Necessita ativar o JavaScript para o visualizar.
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
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