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Last updated: 5/24/2016 5:39:40 AM

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Vulnerability Summary for CVE-2006-4759

Original release date: 09/13/2006
Last revised: 09/05/2008


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 NOTE: this issue was originally disputed by the vendor, but the dispute was withdrawn on 20060926.


CVSS Severity (version 2.0):
CVSS v2 Base Score: 3.6 LOW
Impact Subscore: 4.9
Exploitability Subscore: 3.9
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: High
Authentication: Required to exploit
Impact Type: Allows unauthorized modification; Allows disruption of service


Successful exploitation requires that the attacker has Administrative rights.

Vendor Statements (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: VIM
Name: 20060926 PunBB - more
External Source: VIM
Name: 20060925 PunBB - more
External Source: MISC
Name: http://www.security.nnov.ru/Odocument221.html
External Source: BUGTRAQ
Name: 20060911 ShAnKaR: multiple PHP application poison NULL byte vulnerability
Type: Advisory; Exploit
External Source: VIM
Name: 20060919 Dispute - CVE-2006-4759 - PunBB
External Source: BUGTRAQ
Name: 20060919 Re: ShAnKaR: multiple PHP application poison NULL byte vulnerability
External Source: CONFIRM
Name: http://forums.punbb.org/viewtopic.php?id=13255
External Source: XF
Name: phpbb-nullbyte-file-upload(28884)

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