Security-news May 2020

security-news@drupal.org

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Webform - Moderately critical - Cross site scripting - SA-CONTRIB-2020-013
by security-news＠drupal.org 06 May '20

06 May '20

View online: https://www.drupal.org/sa-contrib-2020-013 Project: Webform [1] Date: 2020-May-06 Security risk: *Moderately critical* 13∕25 AC:Basic/A:Admin/CI:Some/II:Some/E:Theoretical/TD:All [2] Vulnerability: Cross site scripting Description: The Webform module allows site builders to create forms. The module doesn't sufficiently prevent malicious code from being render via an options elements (i.e select menu, checkboxes, radios, etc...) under the scenario where the site builder allows the raw option value to be displayed. This vulnerability is mitigated by the fact that site builder must be allowed to build webform and select raw as the options element's submission display. Solution: Install the latest version: * If you use the Webform module for Drupal 8, upgrade to Webform 8.x-5.11 [3] Also see the Webform [4] project page. Reported By: * Dan Chadwick [5] Fixed By: * Jacob Rockowitz [6] * Dan Chadwick [7] Coordinated By: * Greg Knaddison [8] of the Drupal Security Team [1] https://www.drupal.org/project/webform [2] https://www.drupal.org/security-team/risk-levels [3] https://www.drupal.org/project/webform/releases/8.x-5.11 [4] https://www.drupal.org/project/webform [5] https://www.drupal.org/user/504278 [6] https://www.drupal.org/user/371407 [7] https://www.drupal.org/user/504278 [8] https://www.drupal.org/user/36762

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Webform - Moderately critical - Access bypass - SA-CONTRIB-2020-012
by security-news＠drupal.org 06 May '20

06 May '20

View online: https://www.drupal.org/sa-contrib-2020-012 Project: Webform [1] Date: 2020-May-06 Security risk: *Moderately critical* 13∕25 AC:Complex/A:None/CI:Some/II:Some/E:Theoretical/TD:Uncommon [2] Vulnerability: Access bypass Description: This module enables you to build forms and surveys in Drupal. The module doesn't sufficiently validate data submitted into Webform Signature element during webform submission creation. This allows a malicious user to generate and extract HMAC hashes for arbitrary data. Such HMAC hashes are used across multiple spots in Drupal 8 core and contrib modules. An extracted HMAC hash could be used to view restricted site content or log in as another user in certain situations. This vulnerability is mitigated by the fact that an attacker must be able to create a webform submission with "Signature" element and then be able to view the submission. For Drupal instances that have "Signature" webform element available to users with low trust, it is advised to change the value of the hash salt within settings.php file to a new random value. Below we reference the specific extract from settings.php that is advised for change in such Drupal instances: /** * Salt for one-time login links, cancel links, form tokens, etc. * * This variable will be set to a random value by the installer. All one-time * login links will be invalidated if the value is changed. Note that if your * site is deployed on a cluster of web servers, you must ensure that this * variable has the same value on each server. * * For enhanced security, you may set this variable to the contents of a file * outside your document root; you should also ensure that this file is not * stored with backups of your database. * * Example: * @code * $settings['hash_salt'] = file_get_contents('/home/example/salt.txt'); * @endcode */ $settings['hash_salt'] = 'new-value-here'; Solution: Install the latest version: * If you use the Webform module for Drupal 8, upgrade to Webform 8.x-5.11 [3] Also see the Webform [4] project page. Reported By: * Heine [5] of the Drupal Security Team Fixed By: * Jacob Rockowitz [6] Coordinated By: * Greg Knaddison [7] of the Drupal Security Team [1] https://www.drupal.org/project/webform [2] https://www.drupal.org/security-team/risk-levels [3] https://www.drupal.org/project/webform/releases/8.x-5.11 [4] https://www.drupal.org/project/webform [5] https://www.drupal.org/user/17943 [6] https://www.drupal.org/user/371407 [7] https://www.drupal.org/user/36762

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Webform - Critical - Remote Code Execution - SA-CONTRIB-2020-011
by security-news＠drupal.org 06 May '20

06 May '20

View online: https://www.drupal.org/sa-contrib-2020-011 Project: Webform [1] Date: 2020-May-06 Security risk: *Critical* 17∕25 AC:Basic/A:Admin/CI:All/II:All/E:Theoretical/TD:All [2] Vulnerability: Remote Code Execution Description: This module enables you to build forms and surveys in Drupal. The module doesn't sufficiently filter webform element properties (attributes) under the scenario of editing a webform. Malicious user could craft such an attribute (#element_validate, for example) that would invoke execution of undesired PHP code. This vulnerability is mitigated by the fact that an attacker must have a role with the permission "Edit own webform" (or "Edit any webform"). Solution: Install the latest version: * If you use the Webform module for Drupal 8, upgrade to Webform 8.x-5.11 [3] Also see the Webform [4] project page. Reported By: * Jacob Rockowitz [5] Fixed By: * Jacob Rockowitz [6] * Heine [7] of the Drupal Security Team * bucefal91 [8] Coordinated By: * Greg Knaddison [9] of the Drupal Security Team [1] https://www.drupal.org/project/webform [2] https://www.drupal.org/security-team/risk-levels [3] https://www.drupal.org/project/webform/releases/8.x-5.11 [4] https://www.drupal.org/project/webform [5] https://www.drupal.org/user/371407 [6] https://www.drupal.org/user/371407 [7] https://www.drupal.org/user/17943 [8] https://www.drupal.org/user/504128 [9] https://www.drupal.org/user/36762

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Security-news May 2020