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STG Security Advisory: [SSA-20041215-15] Vulnerability of uploading files with multiple extensions in MoniWiki
From: <advisory () stgsecurity com>
Date: 15 Dec 2004 18:13:01 -0000
STG Security Advisory: [SSA-20041215-15] Vulnerability of uploading files with multiple extensions in MoniWiki Revision 1.0 Date Published: 2004-12-15 (KST) Last Update: 2004-12-15 Disclosed by SSR Team (advisory () stgsecurity com) Summary ======== MoniWiki is a wiki web application used by many Korean Linux users. However, an input validation flaw can cause malicious attackers to run arbitrary commands with the privilege of the HTTPD process, which is typically run as the nobody user. Vulnerability Class =================== Implementation Error: Input validation flaw Impact ====== High : arbitrary command execution. Affected Products ================ MoniWiki 1.0.9.2 and prior. Vendor Status: FIXED ==================== 2004-12-08 Vulnerability found. 2004-12-08 MoniWiki developer notified. 2004-12-09 First patch updated in CVS but didn't solve the problem. 2004-12-09 Second patch updated in CVS. 2004-12-15 Official release. Details ======= MoniWiki doesn't implemented in "UploadFile.php" to check multiple extensions of uploaded files, e.g. attack.php.hwp, so malicious attackers can upload arbitrary script files (php, pl, cgi, etc) to a web server. This is originated from a feature of Apache MIME module (mod_mime), which regards attack.php.hwp as a normal PHP file and execute the file through mod_php module with the privilege of the HTTPD process. cf. http://httpd.apache.org/docs/mod/mod_mime.html - "Files with Multiple Extensions" : it's a feature, not a bug. Solution ========= Update to patched version of UploadFile.php http://kldp.net/forum/forum.php?forum_id=2085 Vendor URL ========== http://kldp.net/projects/moniwiki/ Credits ====== Jeremy Bae at STG Security
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- STG Security Advisory: [SSA-20041215-15] Vulnerability of uploading files with multiple extensions in MoniWiki advisory (Dec 15)