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AUSCERT Security Bulletin
ASB-2015.0048.2
Two vulnerabilities have been corrected in WordPress 4.2.2
4 August 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: WordPress
Operating System: UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Cross-site Scripting -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2015-8834
Revision History: August 4 2016: Added CVE
May 7 2015: Initial Release
OVERVIEW
Two vulnerabilities have been identified in WordPress prior to
version 4.2.2. [1]
IMPACT
The vendor has provided the following details regarding the
vulnerability:
"The Genericons icon font package, which is used in a number of
popular themes and plugins, contained an HTML file vulnerable to a
cross-site scripting attack. All affected themes and plugins hosted
on WordPress.org (including the Twenty Fifteen default theme) have
been updated today by the WordPress security team to address this
issue by removing this nonessential file. To help protect other
Genericons usage, WordPress 4.2.2 proactively scans the wp-content
directory for this HTML file and removes it. Reported by Robert
Abela of Netsparker." [1]
The second vulnerability exists due to an incomplete fix for a
cross-site scripting vulnerability addressed in WordPress 4.2.1. [2]
"WordPress versions 4.2 and earlier are affected by a critical
cross-site scripting vulnerability, which could enable anonymous
users to compromise a site. WordPress 4.2.2 includes a comprehensive
fix for this issue." [1]
MITIGATION
The vendor strongly encourages users to update to the latest
version. [1]
REFERENCES
[1] WordPress 4.2.2 Security and Maintenance Release
https://wordpress.org/news/2015/05/wordpress-4-2-2/
[2] WordPress 4.2.1 Security Release
https://wordpress.org/news/2015/04/wordpress-4-2-1/
AusCERT has made every effort to ensure that the information contained
in this document is accurate. However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.
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Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
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