20391 : phpBB usercp_register.php signature_bbcode_uid Variable Arbitrary PHP Code Execution
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Views All Time

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Info

Last Modified

7 months ago

Percent Complete

100%

Disclosure

Oct 31, 2005

Discovery

Aug 14, 2005

Dates

Exploit

Unknown

Solution

Unknown

Description

phpbb contains a flaw that allows remote code execution. This flaw exists because the application does not validate the 'signature_bbcode_uid' variable upon submission to the 'usercp_register.php' script. This could allow a user to execute remote code, leading to a loss of integrity.

Classification

Location: Remote/Network Access Required
Attack Type: Input Manipulation
Impact: Loss of Integrity
Exploit: Exploit Unknown
OSVDB: Web Related

Technical

This vulnerability is only present when the register_globals PHP option is set to 'on', which has not been the default setting for PHP installs since version 4.2.0 (22-Apr-2002). This can be exploited if magic_quotes_gpc is turned on or off.

Solution

Upgrade to version 2.0.18 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.

Products

phpBB Group

phpBB

2.0.17

References

Security Tracker: 1015121
Secunia Advisory ID: 17366 18098
CVE ID: 2005-3420 (see also: NVD)
Related OSVDB ID: 20386 20387 20388 20389 20390
FrSIRT Advisory: ADV-2005-2250
Mail List Post: http://archives.neohapsis.com/archives/fulldisclosure/2005-10/0637.html
Vendor Specific Advisory URL: http://www.debian.org/security/2005/dsa-925
Other Advisory URL: http://www.hardened-php.net/advisory_172005.75.html

Tools & Filters

Nessus	22791

Credit

Stefan Esser - sesserhardened-php.net - www.hardened-php.net

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