National Cyber-Alert System

Vulnerability Summary for CVE-2006-4759

Overview

PunBB 1.2.12 does not properly handle an avatar directory pathname ending in %00, which allows remote authenticated administrative users to upload arbitrary files and execute code, as demonstrated by a query to admin_options.php with an avatars_dir parameter ending in %00. NOTE: this issue was originally disputed by the vendor, but the dispute was withdrawn on 20060926.

Impact

CVSS Severity (version 2.0):

CVSS Version 2 Metrics:

Solution

Successful exploitation requires that the attacker has Administrative rights.}

Vendor Statments (disclaimer)

Official Statement from PunBB (09/28/2006)

PunBB 1.2.13 has been released to fix this vulnerability. The updated version is available at http://punbb.org/downloads.php.

References to Advisories, Solutions, and Tools

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External Source: XF

Name: phpbb-nullbyte-file-upload(28884)

Hyperlink:http://xforce.iss.net/xforce/xfdb/28884

External Source: BUGTRAQ

Name: 20060919 Re: ShAnKaR: multiple PHP application poison NULL byte vulnerability

Hyperlink:http://www.securityfocus.com/archive/1/archive/1/446420/100/0/threaded

External Source: BUGTRAQ

Name: 20060911 ShAnKaR: multiple PHP application poison NULL byte vulnerability

Type: Advisory

Hyperlink:http://www.securityfocus.com/archive/1/archive/1/445788/100/0/threaded

External Source: MISC

Name: http://www.security.nnov.ru/Odocument221.html

Hyperlink:http://www.security.nnov.ru/Odocument221.html

External Source: VIM

Name: 20060926 PunBB - more

Hyperlink:http://www.attrition.org/pipermail/vim/2006-September/001055.html

External Source: VIM

Name: 20060925 PunBB - more

Hyperlink:http://www.attrition.org/pipermail/vim/2006-September/001052.html

External Source: VIM

Name: 20060919 Dispute - CVE-2006-4759 - PunBB

Hyperlink:http://www.attrition.org/pipermail/vim/2006-September/001041.html

External Source: CONFIRM

Name: http://forums.punbb.org/viewtopic.php?id=13255

Hyperlink:http://forums.punbb.org/viewtopic.php?id=13255