SANS ISC: November 2016 Microsoft Patch Day

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Microsoft today released 13 bulletins (plus one bulletin from Adobe for Flash). 5 of the Microsoft bulletins, and the Adobe Flash bulletin are rated critical. There are a number of vulnerabilities that have either already been known, or have already been exploited:

MS16-129 and MS16-142 (Internet Explorer): An information disclosure (CVE-2016-7199) has already been publicly disclosed, but not been exploited yet. The vulnerability can leak information cross-origin. In addition there is a spoofing vulnerability that only affects Microsoft Edge that has been publicly disclosed ( CVE-2016-7209 ).

MS16-132 (Microsoft Graphics Component): This is yet another open type font issue (CVE-2016-7256). IT has already been exploited and I labeled this bulletin as "Patch Now" . The vulnerability can be used for remote code execution.

MS16-135 (Kernel Mode Drivers): A Win32k priviledge escalation vulnerability (CVE-2016-7255) has already been publicly disclosed and exploited. This one is a bit odd in that it sounds like what Google released as CVE-2016-7855. Trying to clarify if this is a typo. 

Full details: https://isc.sans.edu/mspatchdays.html?viewday=2016-11-08

Note that Microsoft didn't use the first two bulletins for the usual Internet Explorer and Edge cumulative updates. Instead, the first bulletin (MS16-129) is used for Edge, and the last one (MS16-142) is used for Internet Explorer. The Flash update uses the next to last bulletin (MS16-141). 

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Johannes B. Ullrich, Ph.D.
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