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Microsoft: Critical Windows and Internet Explorer patches incoming

08 Aug 2014
Critical Internet Explorer flaws found

Microsoft will release two critical fixes for vulnerabilities in its Windows and Internet Explorer (IE) services for its August Patch Tuesday.

The August Patch Tuesday update is due to arrive on 12 August and will feature at least nine security fixes. The IE and Windows patches are the only two to hold a "critical" rating from Microsoft and leave users open to remote code-execution attacks.

Wolfgang Kandek, CTO of Qualys, said the IE flaw is the more serious of the two as it affects all versions of the web browser, while the Windows bug is limited to a more specific set of users.

"The most critical patch is bulletin one, which affects all versions of IE. Since browsers are the attackers' favorite targets, this patch should be top of your list. An attacker could exploit this vulnerability through a malicious webpage," he explained.

"Bulletin two is a critical update for Windows and affects Windows 7 and Windows 8, plus the Media Center TV Pack for Vista. I believe it must be addressing bugs in the graphics-processing pipeline, most likely in an online video component."

The remaining seven vulnerabilities related to Microsoft's Office, SQL server, Windows, Server and .Net framework services. Each holds an "important" rating from Microsoft and leaves users open to a mix of remote code-execution, elevation of privilege and security-bypass exploits.

Tripwire manager of security research Tyler Reguly, highlighted the security-bypass flaws as being particularly troubling and praised Microsoft for its rapid response.

"We've seen more and more updates classified as ‘security feature bypass' over the past 12 months and it's great to see Microsoft fixing these issues. Many of these patches resolve known ASLR [Address Space Layout Randomisation] and DEP [Data Execution Prevention] bypasses, that exploit authors use to successfully exploit other vulnerabilities," he said.

IE has been a constant source of new vulnerabilities in recent months. Microsoft issued a separate fix for a critical vulnerability in IE in its July Patch Tuesday. Prior to that the company was forced to issue 59 IE fixes as part of its June Patch Tuesday update.

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Alastair Stevenson

Alastair has worked as a reporter covering security and mobile issues at V3 since March 2012. Before entering the field of journalism Alastair had worked in numerous industries as both a freelance copy writer and artist.

View Alastair's Google+ profile

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