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Date: Thu, 27 Feb 2014 14:14:59 +0100
From: Damien Cauquil <d.cauquil@...dream.com>
To: cve-assign@...re.org
CC: oss-security@...ts.openwall.com
Subject: Re: CVE request: PLOGGER 1.0RC1 multiple vulnerabilities
> Can you explain the race condition? For example: without the true
> image file, would the product extract the .php file but then delete it
> very soon afterward?
The zip file must at least contains a non-empty image file with a name
including a valid extension, and of course the exploit php file. Once
the zip uploaded, the web application tells the user it has found one or
many images, and asks for a validation. If this validation step is not
performed, all the unzipped files remain and the php file can be called
directly with a web browser.
Le 27/02/2014 14:07, cve-assign@...re.org a écrit :
>> We found two vulnerabilities in PLOGGER version 1.0RC1, including:
>
>
>> 1. Authenticated Arbitrary file upload vulnerability affecting PLOGGER
>> version 1.0RC1
>
>> This vulnerability allows an authenticated user to upload an arbitrary
>> PHP file on the remote web server in an accessible path, by sending a
>> specifically crafted zip file.
>
>> session.post('http://' + HOST + "/plog-admin/plog-upload.php",
>
>> ## Add true image file to block the race condition (mandatory not
>> null)
>
> Use CVE-2014-2223.
>
> Can you explain the race condition? For example: without the true
> image file, would the product extract the .php file but then delete it
> very soon afterward?
>
>
>
>> 2. CAPTCHA bypass vulnerability
>
>> A theme called "Lucid" provided in PLOGGER version 1.0RC1 implements a
>> weak CAPTCHA prone to a replay attack. By abusing this vulnerability,
>> an unauthenticated user may be able to post a huge number of comments.
>
>> The script generating the CAPTCHA image inserts a code in the current
>> user session, but this value is not unset while processing the form,
>> thus allowing an attacker to submit multiple times the form with
>> always the same captcha and associated code.
>
>> The vulnerable code is located in plog-comment.php, line 106.
>
> Use CVE-2014-2224.
>
>
--
Damien Cauquil
Directeur Recherche & Développement
CHFI | CEH | ECSA | CEI
Sysdream
108 avenue Gabriel Péri
93400 Saint Ouen
Tel: +33 (0) 1 78 76 58 21
www.sysdream.com
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