phpBB: Cross-Site Scripting Vulnerability

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200505-10 / phpBB
Release Date	May 14, 2005
Latest Revision	May 14, 2005: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
www-apps/phpBB	< 2.0.15	>= 2.0.15	All supported architectures

Related bugreports: #90213

Synopsis

phpBB is vulnerable to a cross-site scripting attack that could allow arbitrary scripting code execution.

2. Impact Information

Background

phpBB is an Open Source bulletin board package.

Description

phpBB is vulnerable to a cross-site scripting vulnerability due to improper sanitization of user supplied input. Coupled with poor validation of BBCode URLs which may be included in a forum post, an unsuspecting user may follow a posted link triggering the vulnerability.

Impact

Successful exploitation of the vulnerability could cause arbitrary scripting code to be executed in the browser of a user.

3. Resolution Information

Workaround

There are no known workarounds at this time.

Resolution

All phpBB users should upgrade to the latest version:

Code Listing 3.1: Resolution

emerge --sync
emerge --ask --oneshot --verbose ">=www-apps/phpBB-2.0.15"

4. References

Page updated May 14, 2005

Summary: This is a Gentoo Linux Security Advisory

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