Nytro Posted December 20, 2012 Report Posted December 20, 2012 Drupal Core 6.x / 7.x Access Bypass / Code Execution Authored by Derek Wright, Damien Tournoud, Simon Rycroft | Site drupal.org Drupal core versions 6.x and 7.x suffer from access bypass and arbitrary PHP code execution vulnerabilities.View online: http://drupal.org/SA-CORE-2012-004 * Advisory ID: DRUPAL-SA-CORE-2012-004 * Project: Drupal core [1] * Version: 6.x, 7.x * Date: 2012-December-19 * Security risk: Moderately critical [2] * Exploitable from: Remote * Vulnerability: Access bypass, Arbitrary PHP code execution-------- DESCRIPTION ---------------------------------------------------------Multiple vulnerabilities were fixed in the supported Drupal core versions 6and 7..... Access bypass (User module search - Drupal 6 and 7)A vulnerability was identified that allows blocked users to appear in usersearch results, even when the search results are viewed by unprivilegedusers.This vulnerability is mitigated by the fact that the default Drupal core usersearch results only display usernames (and disclosure of usernames is notconsidered a security vulnerability [3]). However, since modules or themesmay override the search results to display more information from each user'sprofile, this could result in additional information about blocked usersbeing disclosed on some sites.CVE: Requested..... Access bypass (Upload module - Drupal 6)A vulnerability was identified that allows information about uploaded filesto be displayed in RSS feeds and search results to users that do not have the"view uploaded files" permission.This issue affects Drupal 6 only.CVE: Requested..... Arbitrary PHP code execution (File upload modules - Drupal 6 and 7)Drupal core's file upload feature blocks the upload of many files that can beexecuted on the server by munging the filename. A malicious user could name afile in a manner that bypasses this munging of the filename in Drupal's inputvalidation.This vulnerability is mitigated by several factors: The attacker would needthe permission to upload a file to the server. Certain combinations of PHPand filesystems are not vulnerable to this issue, though we did not performan exhaustive review of the supported PHP versions. Finally: the server wouldneed to allow execution of files in the uploads directory. Drupal core hasprotected against this with a .htaccess file protection in place fromSA-2006-006 - Drupal Core - Execution of arbitrary files in certain Apacheconfigurations [4]. Users of IIS should consider updating their web.config[5]. Users of Nginx should confirm that only the index.php and other knowngood scripts are executable. Users of other webservers should review theirconfiguration to ensure the goals are achieved in some other way.CVE: Requested.-------- CVE IDENTIFIER(S) ISSUED -------------------------------------------- * /A CVE identifier [6] will be requested, and added upon issuance, in accordance with Drupal Security Team processes./-------- VERSIONS AFFECTED --------------------------------------------------- * Drupal core 6.x versions prior to 6.27. * Drupal core 7.x versions prior to 7.18.-------- SOLUTION ------------------------------------------------------------Install the latest version: * If you use Drupal 6.x, upgrade to Drupal core 6.27 [7]. * If you use Drupal 7.x, upgrade to Drupal core 7.18 [8].Also see the Drupal core [9] project page.-------- REPORTED BY --------------------------------------------------------- * The access bypass issue in the User module search results was reported by Derek Wright [10] of the Drupal Security Team. * The access bypass issue in the Drupal 6 Upload module was reported by Simon Rycroft [11], and by Damien Tournoud [12] of the Drupal Security Team. * The arbitrary code execution issue was reported by Amit Asaravala [13].-------- FIXED BY ------------------------------------------------------------ * The access bypass issue in the User module search results was fixed by Derek Wright [14], Ivo Van Geertruyen [15], Peter Wolanin [16], and David Rothstein [17], all members of the Drupal Security Team. * The access bypass issue in the Drupal 6 Upload module was fixed by Michaël Dupont [18], and by Fox [19] and David Rothstein [20] of the Drupal Security Team. * The arbitrary code execution issue was fixed by Nathan Haug [21] and Justin Klein-Keane [22], and by John Morahan [23] and Greg Knaddison [24] of the Drupal Security team.-------- COORDINATED BY ------------------------------------------------------ * Jeremy Thorson [25] QA/Testing infrastructure * Ben Jeavons [26] of the Drupal Security Team * David Rothstein [27] of the Drupal Security Team * Gábor Hojtsy [28] of the Drupal Security Team * Greg Knaddison [29] of the Drupal Security Team * Fox [30] of the Drupal Security Team-------- CONTACT AND MORE INFORMATION ----------------------------------------The Drupal security team can be reached at security at drupal.org or via thecontact form at http://drupal.org/contact [31].Learn more about the Drupal Security team and their policies [32], writingsecure code for Drupal [33], and securing your site [34].[1] http://drupal.org/project/drupal[2] http://drupal.org/security-team/risk-levels[3] http://drupal.org/node/1004778[4] http://drupal.org/node/65409[5] http://drupal.org/node/1543392[6] http://cve.mitre.org/[7] http://drupal.org/drupal-6.27-release-notes[8] http://drupal.org/drupal-7.18-release-notes[9] http://drupal.org/project/drupal[10] http://drupal.org/user/46549[11] http://drupal.org/user/151544[12] http://drupal.org/user/22211[13] http://drupal.org/user/181407[14] http://drupal.org/user/46549[15] http://drupal.org/user/383424[16] http://drupal.org/user/49851[17] http://drupal.org/user/124982[18] http://drupal.org/user/400288[19] http://drupal.org/user/426416[20] http://drupal.org/user/124982[21] http://drupal.org/user/35821[22] http://drupal.org/user/302225[23] http://drupal.org/user/58170[24] http://drupal.org/user/36762[25] http://drupal.org/user/148199[26] http://drupal.org/user/91990[27] http://drupal.org/user/124982[28] http://drupal.org/user/4166[29] http://drupal.org/user/36762[30] http://drupal.org/user/426416[31] http://drupal.org/contact[32] http://drupal.org/security-team[33] http://drupal.org/writing-secure-code[34] http://drupal.org/security/secure-configurationSursa: Drupal Core 6.x / 7.x Access Bypass / Code Execution ? Packet Storm Quote
