Microsoft Internet Explorer critical security flaw

Tuesday, April 29, 2014

See also: Update - Microsoft Internet Explorer critical security flaw

From: Jason Testart, Director, Information Security Services

On April 26th, Microsoft announced a critical security flaw with the Internet Explorer (IE) browser.  The flaw was discovered as cybercriminals were using it to target organizations in the USA.  The flaw affects IE versions 6 through 11 on Microsoft Windows.  It is not known when Microsoft will provide a fix.  

Given the criticality, it is recommended that IE users move to an alternate browser (such as Chrome or Firefox) and also set this as their default browser (Start > Control panel > Default programs).  Until a fix is released for this issue, use of the IE browser should be restricted to cases where institutional applications (e.g. FORE) require IE for proper/full functionality. 

Regardless of browser used, we encourage everyone to avoid clicking suspicious links in emails and to treat unsolicited phone calls offering computer support as fraudulent.

Windows XP users are advised to avoid the IE browser indefinitely as we do not expect Microsoft will be providing a fix for this issue on that platform.  Windows XP users are strongly encouraged to upgrade to a newer, supported operating system as soon as possible.

Help documents:

Questions/concerns? Please contact the IST Service Desk, helpdesk@uwaterloo.ca or ext. 44357.

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