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AUSCERT External Security Bulletin Redistribution
ESB-2020.0964
Drupal project addresses two moderately critical vulnerabilities
19 March 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Drupal core
CKEditor
Publisher: Drupal
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Cross-site Scripting -- Remote with User Interaction
Resolution: Patch/Upgrade
Original Bulletin:
https://www.drupal.org/sa-core-2020-001
https://www.drupal.org/sa-contrib-2020-007
Comment: This bulletin contains two (2) Drupal security advisories.
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Drupal core - Moderately critical - Third-party library - SA-CORE-2020-001
Project: Drupal core
Date: 2020-March-18
Security risk: Moderately critical 13/25
AC:Complex/A:User/CI:Some/II:Some/E:Proof/TD:Default
Vulnerability: Third-party library
Version: 8.8.x-dev
8.7.x-dev
Description:
The Drupal project uses the third-party library CKEditor , which has released a
security improvement that is needed to protect some Drupal configurations.
Vulnerabilities are possible if Drupal is configured to use the WYSIWYG
CKEditor for your site's users. When multiple people can edit content, the
vulnerability can be used to execute XSS attacks against other people,
including site admins with more access.
The latest versions of Drupal update CKEditor to 4.14 to mitigate the
vulnerabilities.
Solution:
Install the latest version:
o If you are using Drupal 8.8.x, upgrade to Drupal 8.8.4 .
o If you are using Drupal 8.7.x, upgrade to Drupal 8.7.12 .
Versions of Drupal 8 prior to 8.7.x have reached end-of-life and do not receive
security coverage.
The CKEditor module can also be disabled to mitigate the vulnerability until
the site is updated.
Note for Drupal 7 users
Drupal 7 core is not affected by this release; however, users who have
installed the third-party CKEditor library (for example, with a contributed
module) should ensure that the downloaded library is updated to CKEditor 4.14
or higher, or that CDN URLs point to a version of CKEditor 4.14 or higher.
Disabling all WYSIWYG modules can mitigate the vulnerability until the site is
updated.
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CKEditor - WYSIWYG HTML editor - Moderately critical - Cross site scripting -
SA-CONTRIB-2020-007
Project: CKEditor - WYSIWYG HTML editor
Date: 2020-March-18
Security risk: Moderately critical
11/25 AC:Complex/A:User/CI:Some/II:Some/E:Theoretical/TD:Uncommon
Vulnerability: Cross site scripting
Description:
The CKEditor module (and its predecessor, FCKeditor module) allows Drupal to
replace textarea fields with CKEditor 3.x/4.x (FCKeditor 2.x in case of
FCKeditor module) - a visual HTML editor, sometimes called WYSIWYG editor.
Due to the usage of the JavaScript `eval()` function on non-filtered data in
admin section, it was possible for a user with permission to create content
visible in the admin area to inject specially crafted malicious script which
causes Cross Site Scripting (XSS).
The problem existed in CKEditor module for Drupal, not in JavaScript libraries
with the same names.
Solution:
Install the latest version:
o If you use the CKEditor module for Drupal 7.x, upgrade to CKEditor 7.x-1.19
Also see the CKEditor- WYSIWYG HTML editor project page
Reported By:
o Yonatan Offek
Fixed By:
o Robert Mikolajuk
Coordinated By:
o Greg Knaddison of the Drupal Security Team
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