20391 : phpBB usercp_register.php signature_bbcode_uid Variable Arbitrary PHP Code Execution
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
7	555	over 6 years ago	over 3 years ago	0 times	90%

Timeline

Discovery Date	Disclosure Date
2005-08-14	2005-10-31

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
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
VUPEN 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

	22791
	3163

Credit

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

CVSSv2 Score

CVSSv2 Base Score = 7.5
Source: nvd.nist.gov | Generated: 2005-11-03 | Disagree?

Blogs

This product uses the Daylife API but is not endorsed or certified by Daylife.

This section lists the latest news and blogs found via the daylife API (and for older items, the technorati API), which mention or otherwise discuss this vulnerability.

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