Posts Tagged: Patch Tuesday June 2019


12
Jun 19

Microsoft Patch Tuesday, June 2019 Edition

Microsoft¬†on Tuesday released updates to fix 88 security vulnerabilities in its Windows operating systems and related software. The most dangerous of these include four flaws for which there is already exploit code available. There’s also a scary bug affecting all versions of Microsoft Office that can be triggered by a malicious link or attachment. And of course Adobe has its customary monthly security update for Flash Player.

Microsoft says it has so far seen no exploitation against any of the four flaws that were disclosed publicly prior to their patching this week — nor against any of the 88 bugs quashed in this month’s release. All four are privilege escalation flaws: CVE-2019-1064 and CVE-2019-1069 affect Windows 10 and later; CVE-2019-1053 and CVE-2019-0973 both affect all currently supported versions of Windows.

Most of the critical vulnerabilities — those that can be exploited by malware or miscreants to infect systems without any action on the part of the user — are present in Microsoft’s browsers Internet Explorer and Edge.

According to Allan Liska, senior solutions architect at Recorded Future, serious vulnerabilities¬†in this month’s patch batch reside in Microsoft Word (CVE-2019-1034 and CVE-2019-1035).

“This is another memory corruption vulnerability that requires an attacker to send a specially crafted Microsoft Word document for a victim to open, alternatively an attacker could convince a victim to click on a link to a website hosting a malicious Microsoft Word document,” Liska wrote. “This vulnerability affects all versions of Microsoft Word on Windows and Mac as well as Office 365. Given that Microsoft Word Documents are a favorite exploitation tool of cybercriminals, if this vulnerability is reverse engineered it could be widely exploited.” Continue reading →