Date: Tue, 16 Dec 2014 18:51:19 +0200 From: Henri Salo <henri@...v.fi> To: oss-security@...ts.openwall.com Cc: plugins@...dpress.org, moderators@...db.org, wpscanteam@...il.com Subject: CVE-2014-9119: DB Backup plugin for WordPress download.php file Parameter Remote Path Traversal File Access -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Product: WordPress plugin db-backup Plugin page: https://wordpress.org/plugins/db-backup/ Developer: Syed Amir Hussain "syedamirhussain91" Vulnerability Type: Remote Path Traversal File Access CWE-23: Relative Path Traversal Vulnerable Versions: 4.5 and earlier Fixed Version: N/A Vendor Notification: 2014-11-27 Public Disclosure: 2014-12-16 CVE Reference: CVE-2014-9119 Criticality: High Vulnerability details: DB Backup plugin for WordPress contains a flaw that allows traversing outside of a restricted path. The issue is due to the download.php script not properly sanitizing user input, specifically path traversal style attacks (e.g. '../'). With a specially crafted request, a remote attacker can gain read access to arbitrary files, limited by system operational access control. This vulnerability can be used to get WordPress authentication keys and salts, database address and credentials, which can be used in certain environments to elevate privileges and execute malicious PHP code. Root cause: Unsanitized user input to readfile() function. Proof-of-concept: /wp-content/plugins/db-backup/download.php?file=../../../wp-config.php Timeline: 2014-11-27: Reported to developer and WordPress plugins team. 2014-11-27: CVE assigned and reported to developer. 2014-11-28: Communication with developer and he said this will be fixed. 2014-12-02: Asked status from developer. 2014-12-03: Developer says this will be fixed by 7th. 2014-12-07: Asked status from developer. 2014-12-08: Developer responds. 2014-12-09: Asked more details from developer. 2014-12-10: More discussion about the solution and new disclosure date set. 2014-12-16: Agreed disclosure date was 15th, I don't understand issue with patching so public disclosure. Please note that there are hundreds of backup plugins in WordPress Plugin Directory. Notes: - - Remove plugin "db-backup" as deactivation does not fix the issue. - - Use another plugin until patch is available and new version is published. - - Sites I know using this plugin will be notified via abuse emails today. References: http://cwe.mitre.org/data/definitions/23.html https://scapsync.com/cwe/CWE-23 https://www.owasp.org/index.php/Path_Traversal https://www.owasp.org/index.php/Testing_for_Path_Traversal_%28OTG-AUTHZ-001%29 - -- Henri Salo -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iEYEARECAAYFAlSQYwcACgkQXf6hBi6kbk8uHwCeJfQd1Vjc2Rr6kzyFxF8rC4NW zbMAoKG4tidQkLM5qrnyIfHTVZPXbOdk =5Nmf -----END PGP SIGNATURE-----
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