Alert - Active Exploitation of a Vulnerability in Microsoft Silverlight

Number: AL16-001
Date: 13 January 2016

Purpose

The purpose of this alert is to bring attention to a recently disclosed vulnerability VulnerabilityA flaw or weakness in the design or implementation of an information system or its environment that could be exploited to adversely affect an organization's assets or operations. in Microsoft Silverlight that is under active exploitation.

Assessment

CCIRC is aware of attacks exploiting a recently patched critical vulnerability in Microsoft Silverlight. Identified as CVE-2016-0034, this vulnerability can allow for remote code execution if a user visits a webpage containing a specially crafted Silverlight application.

Suggested action

Due to the elevated risk presented by this vulnerability, CCIRC recommends that system administrators test and deploy the vendor-released updates to affected applications accordingly. CCIRC recommends that priority is given to this patch.

References

CCIRC Advisory AV15-006: Microsoft Critical Security Bulletins Summary for January Microsoft Critical Security Bulletins Summary for January 2016
http://www.publicsafety.gc.ca/cnt/rsrcs/cybr-ctr/2016/av16-005-en.aspx

Microsoft Security Bulletin MS16-006 - Security Update for Silverlight to Address Remote Code Execution (3126036):
https://technet.microsoft.com/library/security/MS16-006

SecureList: The Mysterious Case of CVE-2016-0034: the hunt for a Microsoft Silverlight 0-day
https://securelist.com/blog/research/73255/the-mysterious-case-of-cve-2016-0034-the-hunt-for-a-microsoft-silverlight-0-day/